55  ls -l
   56  filename=y-modified.txt
   57  echo "${filename%.txt}.sh"
   58  echo "${filename%.txt}"
   59  echo "${filename%.*}"
   60  echo "${filename%.*}.sh"
   61  mv $filename "${filename%.*}.sh"
   62  ls -l
   63  echo $filename
   64  echo ${filename/d/x}
   65  echo ${filename//d/x}
   66  echo ${filename//d?/__}
   67  test "$var1" = "$var2"; echo $?
   68  test "$var1" = "$var2" || echo cool
   69  test "$var1" = "$var2" && echo cool
   70  test "$var1" = "$var1" && echo cool
   71  test "$var1" = "$var1" || echo cool
   72  echo this should succeed || echo ERROR
   73  if [ "$var1" != "$var2" ] && -e /etc/passwd; then echo cool; fi
   74  if [ "$var1" != "$var2" ] && [ -e /etc/passwd ]; then echo cool; fi
   75  if [ "$var1" != "$var2" ] && [ -e /etc/passw ]; then echo cool; fi
   76  if [ "$var1" != "$var2" ] || [ -e /etc/passw ]; then echo cool; fi
   77  jobs
   78  man man
   79  jobs
   80  man ls &
   81  jobs
   82  fg
   83  fg
   84  [ -e /etc/passwd ] || { echo a; echo b; }
   85  [ -e /etc/paswd ] || { echo a; echo b; }
   86  [ -e /etc/paswd ] || (echo a; echo b)
   87  [ -e /etc/paswd ] || (cd /tmp; echo a; echo b)
   88  [ -e /etc/paswd ] || { cd /tmp; echo a; echo b; }
   89  cd -
   90  [ -e /etc/paswd ] || { x=1; echo a; echo b; }; echo $x
   91  [ -e /etc/paswd ] || (y=1; echo a; echo b); echo $y
   92  [ -e /etc/paswd ] || { cd /tmp; echo a; echo b };  }
   93  [ -e /etc/paswd ] || { cd /tmp; echo a; echo b; }
   94  x='ls *'
   95  echo $x
   96  $x
   97  clear
   98  fun() { echo this is a function; ls; }
   99  fun
  100  fun() { echo this is a function $1; ls $2; }
  101  fun
  102  fun abc
  103  fun abc /tmp
  104  cd -
  105  cd ~
  106  fun abc /tmp
  107  fun abc 
  108  fun() { abc=1; echo this is a function $1; ls $2; }
  109  echo $abc
  110  fun
  111  echo $abc
  112  fun() { local abc; abc=1; echo this is a function $1; ls $2; }
  113  fun() { local abc; abc=2; echo this is a function $1; ls $2; }
  114  echo $abc
  115  fun
  116  echo $abc
  117  fun() { local abc; abc=2; echo this is a function $1; ls $2; return 0; }
  118  fun; echo $?
  119  fun() { local abc; abc=2; echo this is a function $1; ls $2; return 1; }
  120  fun; echo $?
  121  if fun; then echo ok; fi
  122  if ! fun; then echo ok; fi
  123  vi skript.sh 
  124  ./skript.sh 
  125  cat skript.sh 
  126  jobs
  127  fg
  128  vi design1.sh
  129  vi design2.sh
  130  clear
  131  echo Hello | grep ell
  132  echo Hello | grep el*
  133  echo Hello | grep ^el*
  134  echo Hello | grep ^Hel*
  135  echo Hello | grep ^Hel*o
  136  echo Hello | grep '^Hel*o$'
  137  echo Hellox | grep '^Hel*o$'
  138  echo Hellox | grep '^Hel*o'
  139  echo Hellllllllo | grep '^Hel*o$'
  140  echo Helo | grep '^Hel*o$'
  141  echo Heo | grep '^Hel*o$'
  142  echo Heo | grep '^[Hh]el*o$'
  143  echo heo | grep '^[Hh]el*o$'
  144  echo Heo | grep '^Hel.*o$'
  145  echo Helo | grep '^Hel.*o$'
  146  echo Helasdfjkhfqwero | grep '^Hel.*o$'
  147  echo Helasdfjkhfqwero | grep '.'
  148  echo  | grep '.'
  149  echo ab | grep '.'
  150  echo a | grep '.'
  151  echo  | grep '.'
  152  echo abc | grep '^.*@.*$'
  153  echo abc@xyz | grep '^.*@.*$'
  154  echo abc@xyz | grep '^.*@.*\..*$'
  155  echo abc@xyz.cz | grep '^.*@.*\..*$'
  156  echo abc@xyz.abccz | grep '^.*@.*\..*$'
  157  echo abc@xyz.cz | grep '^.*@.*\..*$'
  158  getent passwd | cut -d: -f5
  159  getent passwd | cut -d: -f5 | head
  160  getent passwd | cut -d: -f5 | less
  161  getent passwd | cut -d: -f5 | grep '^[A-Z][a-z]* [A-Z].*' | less
  162  getent passwd | cut -d: -f5 | grep '^[A-Z][a-z]* [A-Z].*[a-z]$' | less
  163  getent passwd | cut -d: -f5 | grep '^[A-Z][a-z]* [A-Z].*[a-z]$' | less
  164  getent passwd | cut -d: -f5 | grep '^[A-Z][a-z]* [A-Z].*[a-z]$' | grep -v Manager | less
  165  getent passwd | cut -d: -f5 | grep -v '^[A-Z][a-z]* [A-Z].*[a-z]$' 
  166  history >history-`date +%F`.txt
  167  read x
  168  echo $x
  169  help getopts
  170  cd ~
  171  ./design2.sh -h
  172  ./design2.sh -b 50
  173  ./design2.sh -b 50 -a
  174  echo Hello | grep ello
  175  echo Hello | grep lo
  176  echo Hello | grep '^Hello$'
  177  echo "Hello world" | grep '^Hello$'
  178  echo "Hello world" | grep '^Hello'
  179  echo "Hello world" | grep 'ello'
  180  echo "Hello world" | grep 'el*o'
  181  echo "Hellllllllllo world" | grep 'el*o'
  182  echo "Helo world" | grep 'el*o'
  183  echo "Heo world" | grep 'el*o'
  184  echo "Heo world" | grep 'el*o world'
  185  echo "Heoworld" | grep 'el*o world'
  186  echo "Heoworld" | grep 'el*o ?world'
  187  echo "Heoworld" | egrep 'el*o ?world'
  188  echo "Heoworld" | grep '^He.*world$'
  189  echo "Hello world" | grep '^He.*world$'
  190  echo "Hey world" | grep '^He.*world$'
  191  echo "Hey world" | grep '^[hH]e.*world$'
  192  echo "hey world" | grep '^[hH]e.*world$'
  193  echo "" | grep '.'
  194  echo " " | grep '.'
  195  echo "lll" | grep '.'
  196  echo "lll" | grep '^.$'
  197  echo "l" | grep '^.$'
  198  echo "l" | grep '^.*$'
  199  echo "lll" | grep '^.*$'
  200  echo "lll" | grep '^.*@.*$'
  201  echo "xxx@abc" | grep '^.*@.*$'
  202  echo "xxx@" | grep '^.*@.*$'
  203  echo "xxx@abc" | grep '^[a-z].*@.*[a-z]$'
  204  echo "xxx@" | grep '^[a-z].*@.*[a-z]$'
  205  echo "0@" | grep '^[a-z].*@.*[a-z]$'
  206  echo "xxx@abc" | grep '^[a-z].*@.*[a-z]$'
  207  echo "xxx@abc" | grep '^[a-z].*@.*\..*[a-z]$'
  208  echo "xxx@abc.cz" | grep '^[a-z].*@.*\..*[a-z]$'
  209  echo "xxx@abc.czorgorgr" | grep '^[a-z].*@.*\..*[a-z]$'
  210  echo "x x x@abc.czorgorgr" | grep '^[a-z].*@.*\..*[a-z]$'
  211  getent passwd 
  212  getent passwd | sort
  213  getent passwd | sort | less
  214  getent passwd 
  215  getent passwd | cut -d ":" -f 7
  216  getent passwd | cut -d ":" -f 7 | uniq
  217  getent passwd | cut -d ":" -f 7 | sort | uniq
  218  getent passwd | cut -d ":" -f 7 | sort | uniq -c
  219  getent passwd 
  220  getent passwd | sort -t: -k3
  221  getent passwd | sort -t: -k3 -n
  222  getent passwd | sort -t: -k3 -n | tail
  223  getent passwd | cut -d ":" -f 7 | sort | uniq -c
  224  getent passwd | cut -d : -f 5 | cut -d : -f 1 | sort | uniq -c 
  225  getent passwd | cut -d : -f 5 | cut -d " " -f 1 | sort | uniq -c 
  226  getent passwd | cut -d : -f 5 | cut -d " " -f 1 | sort | uniq -c | uniq
  227  getent passwd | cut -d : -f 5 | cut -d " " -f 1 | sort | uniq -c | sort -r 
  228  getent passwd | cut -d : -f 5 | cut -d " " -f 1 | sort | uniq -c | sort -r -n
  229  getent passwd | cut -d : -f 5 | cut -d " " -f 1 | sort | uniq -c | sort -r -n | head -n 10
  230  getent passwd | cut -d : -f 5    # | cut -d " " -f 1 | sort | uniq -c | sort -r -n | head -n 10
  231  getent passwd | cut -d : -f 5 | cut -d " " -f 1 # | sort | uniq -c | sort -r -n | head -n 10
  232  getent passwd | cut -d : -f 5 | cut -d " " -f 1 | sort | uniq -c # | sort -r -n | head -n 10
  233  getent passwd | cut -d : -f 5 | cut -d " " -f 1 | sort | uniq -c | sort -r -n # | head -n 10
  234  getent passwd | cut -d : -f 5 | cut -d " " -f 1 | sort | uniq -c | sort -r -n | head -n 10
  235  getent passwd | less
  236  getent passwd | less
  237  getent passwd | cut -d : -f 5 | cut -d " " -f 2 | sort | uniq -c | sort -r -n | head -n 10
  238  getent passwd | cut -d : -f 5 | cut -d " " -f 2- | sort | uniq -c | sort -r -n | head -n 10
  239  #getent passwd | cut -d : -f 5 | cut -d " " -f 2- | sort | uniq -c | sort -r -n | head -n 10
  240  getent passwd | cut -d : -f 5 | sort | uniq -c | sort -r -n | head -n 10
  241  echo *?[abc]
  242  echo *
  243  echo *.txt
  244  ls -l *.txt
  245  for i in *.txt; do echo $i; done
  246  echo /bin/l?
  247  echo /bin/l*
  248  echo /bin/l*[se]
  249  ls -l
  250  cat z.txt 
  251  vi text.txt
  252  cp text.txt text-modified.txt
  253  vi text-modified.txt 
  254  diff text.txt text-modified.txt 
  255  diff -u text.txt text-modified.txt 
  256  find
  257  find /tmp
  258  find . -name '*.txt'
  259  find . -name *.txt
  260  echo find . -name *.txt
  261  echo find . -name "*.txt"
  262  find . -name "*.txt"
  263  man find
  264  stat x.txt 
  265  stat -c %s x.txt 
  266  var1=abc
  267  echo "${#var}"
  268  echo "${#var1}"
  269  var1=abcdef
  270  echo "${#var1}"
  271  var1=abcdefghi
  272  echo "${#var1}"
  273  echo "${var1:0:3}"
  274  echo "${var1:1:3}"
  275  var1=abcdefghiabcdefghi
  276  echo "${var1#*d}"
  277  echo "${var1##*d}"
  278  echo "${var1%f*}"
  279  echo $var1
  280  echo "${var1%f*}"
  281  echo "${var1%%f*}"
  282  ls -l
  283  filename=text-modified.txt
  284  echo $filename
  285  echo "${filename%.txt}"
  286  echo "${filename%.*}"
  287  echo "${filename%.*}.sh"
  288  echo mv "$filename" "${filename%.*}.sh"
  289  mv "$filename" "${filename%.*}.sh"
  290  ls -l
  291  echo "${filename/d/x}"
  292  echo $filename
  293  echo "${filename/d/x}"
  294  echo "${filename//d/x}"
  295  echo "${filename//e?/__}"
  296  echo a; echo b
  297  [ -e /etc/passwd ]; echo $?
  298  [ -e /etc/paswd ] || echo $?
  299  [ -e /etc/passwd ] && echo $?
  300  [ -e /etc/passwd ] || echo $?
  301  [ -e /etc/paswd ] && echo $?
  302  [ -e /etc/paswd ] && echo ahoj
  303  [ -e /etc/passwd ] && echo ahoj
  304  ls -l || echo something that should not fail has failed
  305  ls -l /nonexistent || echo something that should not fail has failed
  306  if [ -e /etc/passwd ] || [ -e /etc/paswd ]; then echo ok; fi
  307  if [ -e /etc/passwd ] && [ -e /etc/paswd ]; then echo ok; fi
  308  if [ -e /etc/passwd ] && [ -e /etc/passwd ]; then echo ok; fi
  309  [ -e /etc/passwd ] && { echo a; echo b; }
  310  [ -e /etc/paswd ] && { echo a; echo b; }
  311  [ -e /etc/passwd ] && (echo a; echo b)
  312  [ -e /etc/passwd ] && (cd /tmp; echo a; echo b)
  313  [ -e /etc/passwd ] && { cd /tmp; echo a; echo b; }
  314  cd -
  315  [ -e /etc/passwd ] && {cd /tmp; echo a; echo b; }
  316  [ -e /etc/passwd ] && {cd /tmp; echo a; echo b }
  317  [ -e /etc/passwd ] && { cd /tmp; echo a; echo b };  };
  318  fun() { echo hello world; ls }
  319  fun() { echo hello world; ls; }
  320  fun
  321  fun() { echo hello world $1; ls "$2"; }
  322  fun
  323  fun hi
  324  fun hi ~
  325  function fun() { echo hello world $1; ls "$2"; }
  326  fun() { echo hello world $1; ls "$2"; }
  327  fun() { echo hello world $1; ls "$2"; }
  328  fun | tr a b
  329  fun | tr e e
  330  fun | tr e E
  331  fun() { echo hello world $1; ls "$2"; return 1; }
  332  echo $?
  333  fun
  334  echo $?
  335  fun() { echo hello world $1; ls "$2"; return 0; }
  336  fun
  337  echo $?
  338  ls
  339  cd ~
  340  ls
  341  vi skript.sh 
  342  fun() { a=1 echo hello world $1; ls "$2"; return 0; }
  343  fun() { a=1; echo hello world $1; ls "$2"; return 0; }
  344  echo $a
  345  fun
  346  echo $a
  347  fun() { local a; a=2; echo hello world $1; ls "$2"; return 0; }
  348  echo $a
  349  fun
  350  echo $a
  351  ./design1.sh 
  352  vim ./design1.sh 
  353  cat ./design1.sh 
  354  ./design1.sh 
  355  vim design2.sh 
  356  ls -l
  357  exit
  358  xrandr
  359  vim code1.sh
  360  rm \\
  361  fg
  362  vi design2.sh \
  363  vi design2.sh 
  364  vim code1.sh
  365  fg
  366  vim code1.sh
  367  getent passwd
  368  getent passwd | sort
  369  getent passwd | sort | less
  370  getent passwd | sort 
  371  getent passwd | sort -t: -k3
  372  getent passwd | sort -t: -k3 -n
  373  getent passwd | 
  374  getent passwd | sort -t: -k3 -n | less
  375  getent passwd | cut -d: -f 7 
  376  getent passwd | cut -d: -f 7 | uniq
  377  getent passwd | cut -d: -f 7 | sort | uniq
  378  getent passwd | cut -d: -f 7 | sort | uniq -c
  379  getent passwd 
  380  getent passwd | cut -d: -f 5
  381  getent passwd | cut -d: -f 5 | cut -d" " -f 1
  382  getent passwd | cut -d: -f 5 | cut -d" " -f 1 | sort | uniq -c
  383  getent passwd | cut -d: -f 5 | cut -d" " -f 1 | sort | uniq -c | sort -n -r
  384  getent passwd | cut -d: -f 5 | cut -d" " -f 1 | sort | uniq -c | sort -n -r | head
  385  getent passwd | less
  386  getent passwd | cut -d: -f 5 | cut -d" " -f 2 | sort | uniq -c | sort -n -r | head
  387  getent passwd | cut -d: -f 5 | rev | cut -d" " -f 1 | rev | sort | uniq -c | sort -n -r | head
  388  getent passwd | cut -d: -f 5 | sort | uniq -c | sort -n -r | head
  389  ls -l
  390  rm y-modified.sh 
  391  cp y.txt y-modified.txt
  392  cat y.txt 
  393  vim y-modified.txt
  394  diff y.txt y-modified.txt
  395  diff -u y.txt y-modified.txt
  396  find
  397  find /tmp
  398  find /tmp -name '*.txt'
  399  find . -name '*.txt'
  400  find . -name 'a*'
  401  man find
  402  stat text
  403  stat text.txt 
  404  stat -c %s text.txt 
  405  x=$(stat -c %s text.txt)
  406  echo $((x/10))
  407  var1=abcdefghi
  408  echo ${#var1}
  409  echo ${var1}
  410  echo ${#var1}
  411  echo ${var1#abc}
  412  echo ${var1#abd}
  413  echo ${var1#*d}
  414  var1=abcdefghiabcdefghi
  415  var1=abcdefghiabcdefghi
  416  echo ${var1}
  417  echo ${var1#*d}
  418  echo ${var1##*d}
  419  echo ${var1}
  420  echo ${var1%ghi}
  421  echo ${var1%ghj}
  422  echo ${var1%e*}
  423  echo ${var1%%e*}
  424  if [ "$var1" = "${var1#a}" ]; then echo nezacina a-ckem; fi
  425  if ! [ "$var1" = "${var1#a}" ]; then echo zacina a-ckem; fi
  426  filename=y-modified.txt 
  427  echo $filename
  428  echo "${filename%.txt}.sh"
  429  echo "${filename%.*}.sh"
  430  mv "$filename" "${filename%.*}.sh"
  431  ls -l
  432  echo "$filename"
  433  echo "${filename/d/x}"
  434  echo "${filename//d/x}"
  435  echo "${filename//i?/__}"
  436  echo a; echo b
  437  [ -e /etc/passwd ] || echo lala
  438  [ -e /etc/paswd ] || echo lala
  439  [ -e /etc/passwd ] && echo lala
  440  [ -e /etc/paswd ] && echo lala
  441  [ -e /etc/passwd ] && { echo a; echo b; }
  442  [ -e /etc/passwd ] && (echo a; echo b)
  443  [ -e /etc/passwd ] && (cd /tmp; echo a; echo b)
  444  [ -e /etc/passwd ] && (cd /tmp; echo a; pwd)
  445  [ -e /etc/passwd ] && { cd /tmp; echo a; pwd; }
  446  cd -
  447  [ -e /etc/passwd ] && {cd /tmp; echo a; pwd }
  448  [ -e /etc/passwd ] && { cd /tmp; echo a; pwd };  ;|
  449  [ -e /etc/passwd ] && { cd /tmp; echo a; pwd };  ;|
  450  [ -e /etc/passwd ] && { cd /tmp; echo a; pwd };  }
  451  cd -
  452  fun() { echo a; ls; }
  453  fun
  454  fun() { echo a $1; ls $2; }
  455  fun ahoj /tmp
  456  fun() { echo a $1; ls $2; return 0; }
  457  fun; echo $?
  458  fun() { echo a $1; ls $2; return 1; }
  459  fun; echo $?
  460  fun() { var=1; echo a $1; ls $2; return 1; }
  461  fun
  462  echo $var
  463  fun() { local var; var=2; echo a $1; ls $2; return 1; }
  464  fun
  465  echo $var
  466  function fun() { local var; var=2; echo a $1; ls $2; return 1; }
  467  fun() { local var; var=2; echo a $1; ls $2; return 1; }
  468  echo Hello | grep Hello
  469  echo Hello | grep 'H.*o'
  470  echo aHelwloe | grep 'H.*o'
  471  echo aHelwle | grep 'H.*o'
  472  echo aHelwloe | grep '^H.*o$'
  473  echo Helwlo | grep '^H.*o$'
  474  echo Hello | grep '^Hel*o$'
  475  echo Hellllllllo | grep '^Hel*o$'
  476  echo Heo | grep '^Hel*o$'
  477  echo Heo | grep '^[Hh]el*o$'
  478  echo heo | grep '^[Hh]el*o$'
  479  echo heo | grep '.'
  480  echo | grep '.'
  481  echo abc@xyz | grep '^.*@.*$'
  482  echo abc@xyz.cz | grep '^.*@.*$'
  483  echo abc@xyz.cz | grep '^.*@.*\..*$'
  484  echo abc@xyz | grep '^.*@.*\..*$'
  485  echo "a abc@xyz.cz x" | grep '^.*@.*\..*$'
  486  echo "a abc@xyz.cz x" | grep '^[a-z0-9.+-]*@[a-z0-9.-]*\.[a-z0-9.-]*$'
  487  echo "abc@xyz.cz" | grep '^[a-z0-9.+-]*@[a-z0-9.-]*\.[a-z0-9.-]*$'
  488  echo "abc@felk.c-v-u-t.cz" | grep '^[a-z0-9.+-]*@[a-z0-9.-]*\.[a-z0-9.-]*$'
  489  chmod +x code1.sh 
  490  ./code1.sh 
  491  ./code1.sh 
  492  ./code1.sh 
  493  ./code1.sh 
  494  ./code1.sh 
  495  ./design2.sh 
  496  ./design2.sh -h
  497  help getopts
  498  ./design2.sh -h\
  499  ./design2.sh -a
  500  ./design2.sh -b 10 -a
  501  echo $((1 + 1))
  502  echo $RANDOM
  503  echo $RANDOM
  504  echo $RANDOM
  505  echo $RANDOM
  506  echo $RANDOM
  507  echo $RANDOM
  508  echo $RANDOM
  509  echo $RANDOM
  510  echo $RANDOM
  511  echo $RANDOM
  512  echo $RANDOM
  513  echo $RANDOM
  514  echo $RANDOM
  515  echo $RANDOM
  516  echo $((RANDOM % 100)
  517  echo $((RANDOM % 100))
  518  echo $((RANDOM % 100))
  519  echo $((RANDOM % 100))
  520  echo $((RANDOM % 100))
  521  echo $((RANDOM % 100))
  522  echo $((RANDOM % 100))
  523  echo $((RANDOM % 100))
  524  echo $((RANDOM % 100))
  525  echo $((RANDOM % 100))
  526  echo $((RANDOM % 100))
  527  echo $((RANDOM % 100))
  528  echo $((RANDOM % 100))
  529  echo $((RANDOM % 100))
  530  echo $((RANDOM % 100))
  531  echo $((RANDOM % 100))
  532  echo $((RANDOM % 100))
  533  echo $((RANDOM % 100))
  534  echo $((RANDOM % 100))
  535  echo $((RANDOM % 100))
  536  echo $((RANDOM % 100))
  537  vim guess.sh
  538  wget http://pasky.or.cz/cp/relaxplay.tar.gz
  539  cd ~
  540  rm relaxplay.tar.gz 
  541  wget http://pasky.or.cz/cp/relaxplay.tar.gz
  542  ls -l relaxplay.tar.gz
  543  tar tvvf relaxplay.tar.gz
  544  tar t
  545  tar tf relaxplay.tar.gz
  546  tar tvvf relaxplay.tar.gz
  547  tar xvvf relaxplay.tar.gz
  548  cd relax\ play/
  549  ls
  550  vi relaxplay15_03_10.csv
  551  cat relaxplay09_12_10.csv relaxplay10_01_11.csv | wc -l
  552  cat relaxplay09_12_10.csv | wc -l
  553  cat * | wc -l
  554  history >>/tmp/h.txt
   41  echo "${#var1}"
   42  var1=abcdefg
   43  echo "${#var1}"
   44  echo "${var1:0:3}"
   45  echo "${var1:1:3}"
   46  echo "${var1#*d}"
   47  var1=abcdefgabcdefg
   48  echo "${var1#*d}"
   49  echo "${var1#*de}"
   50  echo "${var1##*d}"
   51  echo "${var1%e*}"
   52  echo "$var1"
   53  echo "${var1%e*}"
   54  echo "${var1%%e*}"
   55  ls -l
   56  filename=y-modified.txt
   57  echo "${filename%.txt}.sh"
   58  echo "${filename%.txt}"
   59  echo "${filename%.*}"
   60  echo "${filename%.*}.sh"
   61  mv $filename "${filename%.*}.sh"
   62  ls -l
   63  echo $filename
   64  echo ${filename/d/x}
   65  echo ${filename//d/x}
   66  echo ${filename//d?/__}
   67  test "$var1" = "$var2"; echo $?
   68  test "$var1" = "$var2" || echo cool
   69  test "$var1" = "$var2" && echo cool
   70  test "$var1" = "$var1" && echo cool
   71  test "$var1" = "$var1" || echo cool
   72  echo this should succeed || echo ERROR
   73  if [ "$var1" != "$var2" ] && -e /etc/passwd; then echo cool; fi
   74  if [ "$var1" != "$var2" ] && [ -e /etc/passwd ]; then echo cool; fi
   75  if [ "$var1" != "$var2" ] && [ -e /etc/passw ]; then echo cool; fi
   76  if [ "$var1" != "$var2" ] || [ -e /etc/passw ]; then echo cool; fi
   77  jobs
   78  man man
   79  jobs
   80  man ls &
   81  jobs
   82  fg
   83  fg
   84  [ -e /etc/passwd ] || { echo a; echo b; }
   85  [ -e /etc/paswd ] || { echo a; echo b; }
   86  [ -e /etc/paswd ] || (echo a; echo b)
   87  [ -e /etc/paswd ] || (cd /tmp; echo a; echo b)
   88  [ -e /etc/paswd ] || { cd /tmp; echo a; echo b; }
   89  cd -
   90  [ -e /etc/paswd ] || { x=1; echo a; echo b; }; echo $x
   91  [ -e /etc/paswd ] || (y=1; echo a; echo b); echo $y
   92  [ -e /etc/paswd ] || { cd /tmp; echo a; echo b };  }
   93  [ -e /etc/paswd ] || { cd /tmp; echo a; echo b; }
   94  x='ls *'
   95  echo $x
   96  $x
   97  clear
   98  fun() { echo this is a function; ls; }
   99  fun
  100  fun() { echo this is a function $1; ls $2; }
  101  fun
  102  fun abc
  103  fun abc /tmp
  104  cd -
  105  cd ~
  106  fun abc /tmp
  107  fun abc 
  108  fun() { abc=1; echo this is a function $1; ls $2; }
  109  echo $abc
  110  fun
  111  echo $abc
  112  fun() { local abc; abc=1; echo this is a function $1; ls $2; }
  113  fun() { local abc; abc=2; echo this is a function $1; ls $2; }
  114  echo $abc
  115  fun
  116  echo $abc
  117  fun() { local abc; abc=2; echo this is a function $1; ls $2; return 0; }
  118  fun; echo $?
  119  fun() { local abc; abc=2; echo this is a function $1; ls $2; return 1; }
  120  fun; echo $?
  121  if fun; then echo ok; fi
  122  if ! fun; then echo ok; fi
  123  vi skript.sh 
  124  ./skript.sh 
  125  cat skript.sh 
  126  jobs
  127  fg
  128  vi design1.sh
  129  vi design2.sh
  130  clear
  131  echo Hello | grep ell
  132  echo Hello | grep el*
  133  echo Hello | grep ^el*
  134  echo Hello | grep ^Hel*
  135  echo Hello | grep ^Hel*o
  136  echo Hello | grep '^Hel*o$'
  137  echo Hellox | grep '^Hel*o$'
  138  echo Hellox | grep '^Hel*o'
  139  echo Hellllllllo | grep '^Hel*o$'
  140  echo Helo | grep '^Hel*o$'
  141  echo Heo | grep '^Hel*o$'
  142  echo Heo | grep '^[Hh]el*o$'
  143  echo heo | grep '^[Hh]el*o$'
  144  echo Heo | grep '^Hel.*o$'
  145  echo Helo | grep '^Hel.*o$'
  146  echo Helasdfjkhfqwero | grep '^Hel.*o$'
  147  echo Helasdfjkhfqwero | grep '.'
  148  echo  | grep '.'
  149  echo ab | grep '.'
  150  echo a | grep '.'
  151  echo  | grep '.'
  152  echo abc | grep '^.*@.*$'
  153  echo abc@xyz | grep '^.*@.*$'
  154  echo abc@xyz | grep '^.*@.*\..*$'
  155  echo abc@xyz.cz | grep '^.*@.*\..*$'
  156  echo abc@xyz.abccz | grep '^.*@.*\..*$'
  157  echo abc@xyz.cz | grep '^.*@.*\..*$'
  158  getent passwd | cut -d: -f5
  159  getent passwd | cut -d: -f5 | head
  160  getent passwd | cut -d: -f5 | less
  161  getent passwd | cut -d: -f5 | grep '^[A-Z][a-z]* [A-Z].*' | less
  162  getent passwd | cut -d: -f5 | grep '^[A-Z][a-z]* [A-Z].*[a-z]$' | less
  163  getent passwd | cut -d: -f5 | grep '^[A-Z][a-z]* [A-Z].*[a-z]$' | less
  164  getent passwd | cut -d: -f5 | grep '^[A-Z][a-z]* [A-Z].*[a-z]$' | grep -v Manager | less
  165  getent passwd | cut -d: -f5 | grep -v '^[A-Z][a-z]* [A-Z].*[a-z]$' 
  166  history >history-`date +%F`.txt
  167  read x
  168  echo $x
  169  help getopts
  170  cd ~
  171  ./design2.sh -h
  172  ./design2.sh -b 50
  173  ./design2.sh -b 50 -a
  174  echo Hello | grep ello
  175  echo Hello | grep lo
  176  echo Hello | grep '^Hello$'
  177  echo "Hello world" | grep '^Hello$'
  178  echo "Hello world" | grep '^Hello'
  179  echo "Hello world" | grep 'ello'
  180  echo "Hello world" | grep 'el*o'
  181  echo "Hellllllllllo world" | grep 'el*o'
  182  echo "Helo world" | grep 'el*o'
  183  echo "Heo world" | grep 'el*o'
  184  echo "Heo world" | grep 'el*o world'
  185  echo "Heoworld" | grep 'el*o world'
  186  echo "Heoworld" | grep 'el*o ?world'
  187  echo "Heoworld" | egrep 'el*o ?world'
  188  echo "Heoworld" | grep '^He.*world$'
  189  echo "Hello world" | grep '^He.*world$'
  190  echo "Hey world" | grep '^He.*world$'
  191  echo "Hey world" | grep '^[hH]e.*world$'
  192  echo "hey world" | grep '^[hH]e.*world$'
  193  echo "" | grep '.'
  194  echo " " | grep '.'
  195  echo "lll" | grep '.'
  196  echo "lll" | grep '^.$'
  197  echo "l" | grep '^.$'
  198  echo "l" | grep '^.*$'
  199  echo "lll" | grep '^.*$'
  200  echo "lll" | grep '^.*@.*$'
  201  echo "xxx@abc" | grep '^.*@.*$'
  202  echo "xxx@" | grep '^.*@.*$'
  203  echo "xxx@abc" | grep '^[a-z].*@.*[a-z]$'
  204  echo "xxx@" | grep '^[a-z].*@.*[a-z]$'
  205  echo "0@" | grep '^[a-z].*@.*[a-z]$'
  206  echo "xxx@abc" | grep '^[a-z].*@.*[a-z]$'
  207  echo "xxx@abc" | grep '^[a-z].*@.*\..*[a-z]$'
  208  echo "xxx@abc.cz" | grep '^[a-z].*@.*\..*[a-z]$'
  209  echo "xxx@abc.czorgorgr" | grep '^[a-z].*@.*\..*[a-z]$'
  210  echo "x x x@abc.czorgorgr" | grep '^[a-z].*@.*\..*[a-z]$'
  211  getent passwd 
  212  getent passwd | sort
  213  getent passwd | sort | less
  214  getent passwd 
  215  getent passwd | cut -d ":" -f 7
  216  getent passwd | cut -d ":" -f 7 | uniq
  217  getent passwd | cut -d ":" -f 7 | sort | uniq
  218  getent passwd | cut -d ":" -f 7 | sort | uniq -c
  219  getent passwd 
  220  getent passwd | sort -t: -k3
  221  getent passwd | sort -t: -k3 -n
  222  getent passwd | sort -t: -k3 -n | tail
  223  getent passwd | cut -d ":" -f 7 | sort | uniq -c
  224  getent passwd | cut -d : -f 5 | cut -d : -f 1 | sort | uniq -c 
  225  getent passwd | cut -d : -f 5 | cut -d " " -f 1 | sort | uniq -c 
  226  getent passwd | cut -d : -f 5 | cut -d " " -f 1 | sort | uniq -c | uniq
  227  getent passwd | cut -d : -f 5 | cut -d " " -f 1 | sort | uniq -c | sort -r 
  228  getent passwd | cut -d : -f 5 | cut -d " " -f 1 | sort | uniq -c | sort -r -n
  229  getent passwd | cut -d : -f 5 | cut -d " " -f 1 | sort | uniq -c | sort -r -n | head -n 10
  230  getent passwd | cut -d : -f 5    # | cut -d " " -f 1 | sort | uniq -c | sort -r -n | head -n 10
  231  getent passwd | cut -d : -f 5 | cut -d " " -f 1 # | sort | uniq -c | sort -r -n | head -n 10
  232  getent passwd | cut -d : -f 5 | cut -d " " -f 1 | sort | uniq -c # | sort -r -n | head -n 10
  233  getent passwd | cut -d : -f 5 | cut -d " " -f 1 | sort | uniq -c | sort -r -n # | head -n 10
  234  getent passwd | cut -d : -f 5 | cut -d " " -f 1 | sort | uniq -c | sort -r -n | head -n 10
  235  getent passwd | less
  236  getent passwd | less
  237  getent passwd | cut -d : -f 5 | cut -d " " -f 2 | sort | uniq -c | sort -r -n | head -n 10
  238  getent passwd | cut -d : -f 5 | cut -d " " -f 2- | sort | uniq -c | sort -r -n | head -n 10
  239  #getent passwd | cut -d : -f 5 | cut -d " " -f 2- | sort | uniq -c | sort -r -n | head -n 10
  240  getent passwd | cut -d : -f 5 | sort | uniq -c | sort -r -n | head -n 10
  241  echo *?[abc]
  242  echo *
  243  echo *.txt
  244  ls -l *.txt
  245  for i in *.txt; do echo $i; done
  246  echo /bin/l?
  247  echo /bin/l*
  248  echo /bin/l*[se]
  249  ls -l
  250  cat z.txt 
  251  vi text.txt
  252  cp text.txt text-modified.txt
  253  vi text-modified.txt 
  254  diff text.txt text-modified.txt 
  255  diff -u text.txt text-modified.txt 
  256  find
  257  find /tmp
  258  find . -name '*.txt'
  259  find . -name *.txt
  260  echo find . -name *.txt
  261  echo find . -name "*.txt"
  262  find . -name "*.txt"
  263  man find
  264  stat x.txt 
  265  stat -c %s x.txt 
  266  var1=abc
  267  echo "${#var}"
  268  echo "${#var1}"
  269  var1=abcdef
  270  echo "${#var1}"
  271  var1=abcdefghi
  272  echo "${#var1}"
  273  echo "${var1:0:3}"
  274  echo "${var1:1:3}"
  275  var1=abcdefghiabcdefghi
  276  echo "${var1#*d}"
  277  echo "${var1##*d}"
  278  echo "${var1%f*}"
  279  echo $var1
  280  echo "${var1%f*}"
  281  echo "${var1%%f*}"
  282  ls -l
  283  filename=text-modified.txt
  284  echo $filename
  285  echo "${filename%.txt}"
  286  echo "${filename%.*}"
  287  echo "${filename%.*}.sh"
  288  echo mv "$filename" "${filename%.*}.sh"
  289  mv "$filename" "${filename%.*}.sh"
  290  ls -l
  291  echo "${filename/d/x}"
  292  echo $filename
  293  echo "${filename/d/x}"
  294  echo "${filename//d/x}"
  295  echo "${filename//e?/__}"
  296  echo a; echo b
  297  [ -e /etc/passwd ]; echo $?
  298  [ -e /etc/paswd ] || echo $?
  299  [ -e /etc/passwd ] && echo $?
  300  [ -e /etc/passwd ] || echo $?
  301  [ -e /etc/paswd ] && echo $?
  302  [ -e /etc/paswd ] && echo ahoj
  303  [ -e /etc/passwd ] && echo ahoj
  304  ls -l || echo something that should not fail has failed
  305  ls -l /nonexistent || echo something that should not fail has failed
  306  if [ -e /etc/passwd ] || [ -e /etc/paswd ]; then echo ok; fi
  307  if [ -e /etc/passwd ] && [ -e /etc/paswd ]; then echo ok; fi
  308  if [ -e /etc/passwd ] && [ -e /etc/passwd ]; then echo ok; fi
  309  [ -e /etc/passwd ] && { echo a; echo b; }
  310  [ -e /etc/paswd ] && { echo a; echo b; }
  311  [ -e /etc/passwd ] && (echo a; echo b)
  312  [ -e /etc/passwd ] && (cd /tmp; echo a; echo b)
  313  [ -e /etc/passwd ] && { cd /tmp; echo a; echo b; }
  314  cd -
  315  [ -e /etc/passwd ] && {cd /tmp; echo a; echo b; }
  316  [ -e /etc/passwd ] && {cd /tmp; echo a; echo b }
  317  [ -e /etc/passwd ] && { cd /tmp; echo a; echo b };  };
  318  fun() { echo hello world; ls }
  319  fun() { echo hello world; ls; }
  320  fun
  321  fun() { echo hello world $1; ls "$2"; }
  322  fun
  323  fun hi
  324  fun hi ~
  325  function fun() { echo hello world $1; ls "$2"; }
  326  fun() { echo hello world $1; ls "$2"; }
  327  fun() { echo hello world $1; ls "$2"; }
  328  fun | tr a b
  329  fun | tr e e
  330  fun | tr e E
  331  fun() { echo hello world $1; ls "$2"; return 1; }
  332  echo $?
  333  fun
  334  echo $?
  335  fun() { echo hello world $1; ls "$2"; return 0; }
  336  fun
  337  echo $?
  338  ls
  339  cd ~
  340  ls
  341  vi skript.sh 
  342  fun() { a=1 echo hello world $1; ls "$2"; return 0; }
  343  fun() { a=1; echo hello world $1; ls "$2"; return 0; }
  344  echo $a
  345  fun
  346  echo $a
  347  fun() { local a; a=2; echo hello world $1; ls "$2"; return 0; }
  348  echo $a
  349  fun
  350  echo $a
  351  ./design1.sh 
  352  vim ./design1.sh 
  353  cat ./design1.sh 
  354  ./design1.sh 
  355  vim design2.sh 
  356  ls -l
  357  exit
  358  xrandr
  359  vim code1.sh
  360  rm \\
  361  fg
  362  vi design2.sh \
  363  vi design2.sh 
  364  vim code1.sh
  365  fg
  366  vim code1.sh
  367  getent passwd
  368  getent passwd | sort
  369  getent passwd | sort | less
  370  getent passwd | sort 
  371  getent passwd | sort -t: -k3
  372  getent passwd | sort -t: -k3 -n
  373  getent passwd | 
  374  getent passwd | sort -t: -k3 -n | less
  375  getent passwd | cut -d: -f 7 
  376  getent passwd | cut -d: -f 7 | uniq
  377  getent passwd | cut -d: -f 7 | sort | uniq
  378  getent passwd | cut -d: -f 7 | sort | uniq -c
  379  getent passwd 
  380  getent passwd | cut -d: -f 5
  381  getent passwd | cut -d: -f 5 | cut -d" " -f 1
  382  getent passwd | cut -d: -f 5 | cut -d" " -f 1 | sort | uniq -c
  383  getent passwd | cut -d: -f 5 | cut -d" " -f 1 | sort | uniq -c | sort -n -r
  384  getent passwd | cut -d: -f 5 | cut -d" " -f 1 | sort | uniq -c | sort -n -r | head
  385  getent passwd | less
  386  getent passwd | cut -d: -f 5 | cut -d" " -f 2 | sort | uniq -c | sort -n -r | head
  387  getent passwd | cut -d: -f 5 | rev | cut -d" " -f 1 | rev | sort | uniq -c | sort -n -r | head
  388  getent passwd | cut -d: -f 5 | sort | uniq -c | sort -n -r | head
  389  ls -l
  390  rm y-modified.sh 
  391  cp y.txt y-modified.txt
  392  cat y.txt 
  393  vim y-modified.txt
  394  diff y.txt y-modified.txt
  395  diff -u y.txt y-modified.txt
  396  find
  397  find /tmp
  398  find /tmp -name '*.txt'
  399  find . -name '*.txt'
  400  find . -name 'a*'
  401  man find
  402  stat text
  403  stat text.txt 
  404  stat -c %s text.txt 
  405  x=$(stat -c %s text.txt)
  406  echo $((x/10))
  407  var1=abcdefghi
  408  echo ${#var1}
  409  echo ${var1}
  410  echo ${#var1}
  411  echo ${var1#abc}
  412  echo ${var1#abd}
  413  echo ${var1#*d}
  414  var1=abcdefghiabcdefghi
  415  var1=abcdefghiabcdefghi
  416  echo ${var1}
  417  echo ${var1#*d}
  418  echo ${var1##*d}
  419  echo ${var1}
  420  echo ${var1%ghi}
  421  echo ${var1%ghj}
  422  echo ${var1%e*}
  423  echo ${var1%%e*}
  424  if [ "$var1" = "${var1#a}" ]; then echo nezacina a-ckem; fi
  425  if ! [ "$var1" = "${var1#a}" ]; then echo zacina a-ckem; fi
  426  filename=y-modified.txt 
  427  echo $filename
  428  echo "${filename%.txt}.sh"
  429  echo "${filename%.*}.sh"
  430  mv "$filename" "${filename%.*}.sh"
  431  ls -l
  432  echo "$filename"
  433  echo "${filename/d/x}"
  434  echo "${filename//d/x}"
  435  echo "${filename//i?/__}"
  436  echo a; echo b
  437  [ -e /etc/passwd ] || echo lala
  438  [ -e /etc/paswd ] || echo lala
  439  [ -e /etc/passwd ] && echo lala
  440  [ -e /etc/paswd ] && echo lala
  441  [ -e /etc/passwd ] && { echo a; echo b; }
  442  [ -e /etc/passwd ] && (echo a; echo b)
  443  [ -e /etc/passwd ] && (cd /tmp; echo a; echo b)
  444  [ -e /etc/passwd ] && (cd /tmp; echo a; pwd)
  445  [ -e /etc/passwd ] && { cd /tmp; echo a; pwd; }
  446  cd -
  447  [ -e /etc/passwd ] && {cd /tmp; echo a; pwd }
  448  [ -e /etc/passwd ] && { cd /tmp; echo a; pwd };  ;|
  449  [ -e /etc/passwd ] && { cd /tmp; echo a; pwd };  ;|
  450  [ -e /etc/passwd ] && { cd /tmp; echo a; pwd };  }
  451  cd -
  452  fun() { echo a; ls; }
  453  fun
  454  fun() { echo a $1; ls $2; }
  455  fun ahoj /tmp
  456  fun() { echo a $1; ls $2; return 0; }
  457  fun; echo $?
  458  fun() { echo a $1; ls $2; return 1; }
  459  fun; echo $?
  460  fun() { var=1; echo a $1; ls $2; return 1; }
  461  fun
  462  echo $var
  463  fun() { local var; var=2; echo a $1; ls $2; return 1; }
  464  fun
  465  echo $var
  466  function fun() { local var; var=2; echo a $1; ls $2; return 1; }
  467  fun() { local var; var=2; echo a $1; ls $2; return 1; }
  468  echo Hello | grep Hello
  469  echo Hello | grep 'H.*o'
  470  echo aHelwloe | grep 'H.*o'
  471  echo aHelwle | grep 'H.*o'
  472  echo aHelwloe | grep '^H.*o$'
  473  echo Helwlo | grep '^H.*o$'
  474  echo Hello | grep '^Hel*o$'
  475  echo Hellllllllo | grep '^Hel*o$'
  476  echo Heo | grep '^Hel*o$'
  477  echo Heo | grep '^[Hh]el*o$'
  478  echo heo | grep '^[Hh]el*o$'
  479  echo heo | grep '.'
  480  echo | grep '.'
  481  echo abc@xyz | grep '^.*@.*$'
  482  echo abc@xyz.cz | grep '^.*@.*$'
  483  echo abc@xyz.cz | grep '^.*@.*\..*$'
  484  echo abc@xyz | grep '^.*@.*\..*$'
  485  echo "a abc@xyz.cz x" | grep '^.*@.*\..*$'
  486  echo "a abc@xyz.cz x" | grep '^[a-z0-9.+-]*@[a-z0-9.-]*\.[a-z0-9.-]*$'
  487  echo "abc@xyz.cz" | grep '^[a-z0-9.+-]*@[a-z0-9.-]*\.[a-z0-9.-]*$'
  488  echo "abc@felk.c-v-u-t.cz" | grep '^[a-z0-9.+-]*@[a-z0-9.-]*\.[a-z0-9.-]*$'
  489  chmod +x code1.sh 
  490  ./code1.sh 
  491  ./code1.sh 
  492  ./code1.sh 
  493  ./code1.sh 
  494  ./code1.sh 
  495  ./design2.sh 
  496  ./design2.sh -h
  497  help getopts
  498  ./design2.sh -h\
  499  ./design2.sh -a
  500  ./design2.sh -b 10 -a
  501  cd ~
  502  vi guess.sh
  503  chmod +x ./guess.sh 
  504  ./guess.sh 
  505  fg
  506  ./guess.sh 
  507  fg
  508  ./guess.sh 
  509  fg
  510  cd Downloads/
  511  tar xf aim-kit.tar.bz2 
  512  cd aim-kit
  513  vi statistics.awk 
  514  cd ~
  515  vi guess.sh 
  516  echo abc | egrep '[:digit:]'
  517  echo 4abc | egrep '[:digit:]'
  518  echo 4abc | egrep '[[:digit:]]'
  519  echo abc | egrep '[[:digit:]]'
  520  echo abc | egrep '[[:alnum:]]'
  521  echo 3abc | egrep '[[:alnum:]]'
  522  echo 3abc | egrep '[a-zA-Z0-9]'
  523  echo ab5c | egrep '[[:digit:]]'
  524  echo ab5c | egrep '^[[:digit:]]+$'
  525  echo ab5 | egrep '^[[:digit:]]+$'
  526  echo 5ab5 | egrep '^[[:digit:]]+$'
  527  echo 55 | egrep '^[[:digit:]]+$'
  528  echo  | egrep '^[[:digit:]]+$'
  529  echo 0 | egrep '^[[:digit:]]+$'
  530  echo 1231231231231231231240 | egrep '^[[:digit:]]+$'
  531  fg
  532  ./guess.sh 
  533  fg
  534  ./guess.sh 
  535  fg
  536  help [[
  537  fg
  538  ./guess.sh 
  539  fg
  540  history >>/tmp/h.txt
   43  echo "${#var1}"
   44  echo "${var1:0:3}"
   45  echo "${var1:1:3}"
   46  echo "${var1#*d}"
   47  var1=abcdefgabcdefg
   48  echo "${var1#*d}"
   49  echo "${var1#*de}"
   50  echo "${var1##*d}"
   51  echo "${var1%e*}"
   52  echo "$var1"
   53  echo "${var1%e*}"
   54  echo "${var1%%e*}"
   55  ls -l
   56  filename=y-modified.txt
   57  echo "${filename%.txt}.sh"
   58  echo "${filename%.txt}"
   59  echo "${filename%.*}"
   60  echo "${filename%.*}.sh"
   61  mv $filename "${filename%.*}.sh"
   62  ls -l
   63  echo $filename
   64  echo ${filename/d/x}
   65  echo ${filename//d/x}
   66  echo ${filename//d?/__}
   67  test "$var1" = "$var2"; echo $?
   68  test "$var1" = "$var2" || echo cool
   69  test "$var1" = "$var2" && echo cool
   70  test "$var1" = "$var1" && echo cool
   71  test "$var1" = "$var1" || echo cool
   72  echo this should succeed || echo ERROR
   73  if [ "$var1" != "$var2" ] && -e /etc/passwd; then echo cool; fi
   74  if [ "$var1" != "$var2" ] && [ -e /etc/passwd ]; then echo cool; fi
   75  if [ "$var1" != "$var2" ] && [ -e /etc/passw ]; then echo cool; fi
   76  if [ "$var1" != "$var2" ] || [ -e /etc/passw ]; then echo cool; fi
   77  jobs
   78  man man
   79  jobs
   80  man ls &
   81  jobs
   82  fg
   83  fg
   84  [ -e /etc/passwd ] || { echo a; echo b; }
   85  [ -e /etc/paswd ] || { echo a; echo b; }
   86  [ -e /etc/paswd ] || (echo a; echo b)
   87  [ -e /etc/paswd ] || (cd /tmp; echo a; echo b)
   88  [ -e /etc/paswd ] || { cd /tmp; echo a; echo b; }
   89  cd -
   90  [ -e /etc/paswd ] || { x=1; echo a; echo b; }; echo $x
   91  [ -e /etc/paswd ] || (y=1; echo a; echo b); echo $y
   92  [ -e /etc/paswd ] || { cd /tmp; echo a; echo b };  }
   93  [ -e /etc/paswd ] || { cd /tmp; echo a; echo b; }
   94  x='ls *'
   95  echo $x
   96  $x
   97  clear
   98  fun() { echo this is a function; ls; }
   99  fun
  100  fun() { echo this is a function $1; ls $2; }
  101  fun
  102  fun abc
  103  fun abc /tmp
  104  cd -
  105  cd ~
  106  fun abc /tmp
  107  fun abc 
  108  fun() { abc=1; echo this is a function $1; ls $2; }
  109  echo $abc
  110  fun
  111  echo $abc
  112  fun() { local abc; abc=1; echo this is a function $1; ls $2; }
  113  fun() { local abc; abc=2; echo this is a function $1; ls $2; }
  114  echo $abc
  115  fun
  116  echo $abc
  117  fun() { local abc; abc=2; echo this is a function $1; ls $2; return 0; }
  118  fun; echo $?
  119  fun() { local abc; abc=2; echo this is a function $1; ls $2; return 1; }
  120  fun; echo $?
  121  if fun; then echo ok; fi
  122  if ! fun; then echo ok; fi
  123  vi skript.sh 
  124  ./skript.sh 
  125  cat skript.sh 
  126  jobs
  127  fg
  128  vi design1.sh
  129  vi design2.sh
  130  clear
  131  echo Hello | grep ell
  132  echo Hello | grep el*
  133  echo Hello | grep ^el*
  134  echo Hello | grep ^Hel*
  135  echo Hello | grep ^Hel*o
  136  echo Hello | grep '^Hel*o$'
  137  echo Hellox | grep '^Hel*o$'
  138  echo Hellox | grep '^Hel*o'
  139  echo Hellllllllo | grep '^Hel*o$'
  140  echo Helo | grep '^Hel*o$'
  141  echo Heo | grep '^Hel*o$'
  142  echo Heo | grep '^[Hh]el*o$'
  143  echo heo | grep '^[Hh]el*o$'
  144  echo Heo | grep '^Hel.*o$'
  145  echo Helo | grep '^Hel.*o$'
  146  echo Helasdfjkhfqwero | grep '^Hel.*o$'
  147  echo Helasdfjkhfqwero | grep '.'
  148  echo  | grep '.'
  149  echo ab | grep '.'
  150  echo a | grep '.'
  151  echo  | grep '.'
  152  echo abc | grep '^.*@.*$'
  153  echo abc@xyz | grep '^.*@.*$'
  154  echo abc@xyz | grep '^.*@.*\..*$'
  155  echo abc@xyz.cz | grep '^.*@.*\..*$'
  156  echo abc@xyz.abccz | grep '^.*@.*\..*$'
  157  echo abc@xyz.cz | grep '^.*@.*\..*$'
  158  getent passwd | cut -d: -f5
  159  getent passwd | cut -d: -f5 | head
  160  getent passwd | cut -d: -f5 | less
  161  getent passwd | cut -d: -f5 | grep '^[A-Z][a-z]* [A-Z].*' | less
  162  getent passwd | cut -d: -f5 | grep '^[A-Z][a-z]* [A-Z].*[a-z]$' | less
  163  getent passwd | cut -d: -f5 | grep '^[A-Z][a-z]* [A-Z].*[a-z]$' | less
  164  getent passwd | cut -d: -f5 | grep '^[A-Z][a-z]* [A-Z].*[a-z]$' | grep -v Manager | less
  165  getent passwd | cut -d: -f5 | grep -v '^[A-Z][a-z]* [A-Z].*[a-z]$' 
  166  history >history-`date +%F`.txt
  167  read x
  168  echo $x
  169  help getopts
  170  cd ~
  171  ./design2.sh -h
  172  ./design2.sh -b 50
  173  ./design2.sh -b 50 -a
  174  echo Hello | grep ello
  175  echo Hello | grep lo
  176  echo Hello | grep '^Hello$'
  177  echo "Hello world" | grep '^Hello$'
  178  echo "Hello world" | grep '^Hello'
  179  echo "Hello world" | grep 'ello'
  180  echo "Hello world" | grep 'el*o'
  181  echo "Hellllllllllo world" | grep 'el*o'
  182  echo "Helo world" | grep 'el*o'
  183  echo "Heo world" | grep 'el*o'
  184  echo "Heo world" | grep 'el*o world'
  185  echo "Heoworld" | grep 'el*o world'
  186  echo "Heoworld" | grep 'el*o ?world'
  187  echo "Heoworld" | egrep 'el*o ?world'
  188  echo "Heoworld" | grep '^He.*world$'
  189  echo "Hello world" | grep '^He.*world$'
  190  echo "Hey world" | grep '^He.*world$'
  191  echo "Hey world" | grep '^[hH]e.*world$'
  192  echo "hey world" | grep '^[hH]e.*world$'
  193  echo "" | grep '.'
  194  echo " " | grep '.'
  195  echo "lll" | grep '.'
  196  echo "lll" | grep '^.$'
  197  echo "l" | grep '^.$'
  198  echo "l" | grep '^.*$'
  199  echo "lll" | grep '^.*$'
  200  echo "lll" | grep '^.*@.*$'
  201  echo "xxx@abc" | grep '^.*@.*$'
  202  echo "xxx@" | grep '^.*@.*$'
  203  echo "xxx@abc" | grep '^[a-z].*@.*[a-z]$'
  204  echo "xxx@" | grep '^[a-z].*@.*[a-z]$'
  205  echo "0@" | grep '^[a-z].*@.*[a-z]$'
  206  echo "xxx@abc" | grep '^[a-z].*@.*[a-z]$'
  207  echo "xxx@abc" | grep '^[a-z].*@.*\..*[a-z]$'
  208  echo "xxx@abc.cz" | grep '^[a-z].*@.*\..*[a-z]$'
  209  echo "xxx@abc.czorgorgr" | grep '^[a-z].*@.*\..*[a-z]$'
  210  echo "x x x@abc.czorgorgr" | grep '^[a-z].*@.*\..*[a-z]$'
  211  getent passwd 
  212  getent passwd | sort
  213  getent passwd | sort | less
  214  getent passwd 
  215  getent passwd | cut -d ":" -f 7
  216  getent passwd | cut -d ":" -f 7 | uniq
  217  getent passwd | cut -d ":" -f 7 | sort | uniq
  218  getent passwd | cut -d ":" -f 7 | sort | uniq -c
  219  getent passwd 
  220  getent passwd | sort -t: -k3
  221  getent passwd | sort -t: -k3 -n
  222  getent passwd | sort -t: -k3 -n | tail
  223  getent passwd | cut -d ":" -f 7 | sort | uniq -c
  224  getent passwd | cut -d : -f 5 | cut -d : -f 1 | sort | uniq -c 
  225  getent passwd | cut -d : -f 5 | cut -d " " -f 1 | sort | uniq -c 
  226  getent passwd | cut -d : -f 5 | cut -d " " -f 1 | sort | uniq -c | uniq
  227  getent passwd | cut -d : -f 5 | cut -d " " -f 1 | sort | uniq -c | sort -r 
  228  getent passwd | cut -d : -f 5 | cut -d " " -f 1 | sort | uniq -c | sort -r -n
  229  getent passwd | cut -d : -f 5 | cut -d " " -f 1 | sort | uniq -c | sort -r -n | head -n 10
  230  getent passwd | cut -d : -f 5    # | cut -d " " -f 1 | sort | uniq -c | sort -r -n | head -n 10
  231  getent passwd | cut -d : -f 5 | cut -d " " -f 1 # | sort | uniq -c | sort -r -n | head -n 10
  232  getent passwd | cut -d : -f 5 | cut -d " " -f 1 | sort | uniq -c # | sort -r -n | head -n 10
  233  getent passwd | cut -d : -f 5 | cut -d " " -f 1 | sort | uniq -c | sort -r -n # | head -n 10
  234  getent passwd | cut -d : -f 5 | cut -d " " -f 1 | sort | uniq -c | sort -r -n | head -n 10
  235  getent passwd | less
  236  getent passwd | less
  237  getent passwd | cut -d : -f 5 | cut -d " " -f 2 | sort | uniq -c | sort -r -n | head -n 10
  238  getent passwd | cut -d : -f 5 | cut -d " " -f 2- | sort | uniq -c | sort -r -n | head -n 10
  239  #getent passwd | cut -d : -f 5 | cut -d " " -f 2- | sort | uniq -c | sort -r -n | head -n 10
  240  getent passwd | cut -d : -f 5 | sort | uniq -c | sort -r -n | head -n 10
  241  echo *?[abc]
  242  echo *
  243  echo *.txt
  244  ls -l *.txt
  245  for i in *.txt; do echo $i; done
  246  echo /bin/l?
  247  echo /bin/l*
  248  echo /bin/l*[se]
  249  ls -l
  250  cat z.txt 
  251  vi text.txt
  252  cp text.txt text-modified.txt
  253  vi text-modified.txt 
  254  diff text.txt text-modified.txt 
  255  diff -u text.txt text-modified.txt 
  256  find
  257  find /tmp
  258  find . -name '*.txt'
  259  find . -name *.txt
  260  echo find . -name *.txt
  261  echo find . -name "*.txt"
  262  find . -name "*.txt"
  263  man find
  264  stat x.txt 
  265  stat -c %s x.txt 
  266  var1=abc
  267  echo "${#var}"
  268  echo "${#var1}"
  269  var1=abcdef
  270  echo "${#var1}"
  271  var1=abcdefghi
  272  echo "${#var1}"
  273  echo "${var1:0:3}"
  274  echo "${var1:1:3}"
  275  var1=abcdefghiabcdefghi
  276  echo "${var1#*d}"
  277  echo "${var1##*d}"
  278  echo "${var1%f*}"
  279  echo $var1
  280  echo "${var1%f*}"
  281  echo "${var1%%f*}"
  282  ls -l
  283  filename=text-modified.txt
  284  echo $filename
  285  echo "${filename%.txt}"
  286  echo "${filename%.*}"
  287  echo "${filename%.*}.sh"
  288  echo mv "$filename" "${filename%.*}.sh"
  289  mv "$filename" "${filename%.*}.sh"
  290  ls -l
  291  echo "${filename/d/x}"
  292  echo $filename
  293  echo "${filename/d/x}"
  294  echo "${filename//d/x}"
  295  echo "${filename//e?/__}"
  296  echo a; echo b
  297  [ -e /etc/passwd ]; echo $?
  298  [ -e /etc/paswd ] || echo $?
  299  [ -e /etc/passwd ] && echo $?
  300  [ -e /etc/passwd ] || echo $?
  301  [ -e /etc/paswd ] && echo $?
  302  [ -e /etc/paswd ] && echo ahoj
  303  [ -e /etc/passwd ] && echo ahoj
  304  ls -l || echo something that should not fail has failed
  305  ls -l /nonexistent || echo something that should not fail has failed
  306  if [ -e /etc/passwd ] || [ -e /etc/paswd ]; then echo ok; fi
  307  if [ -e /etc/passwd ] && [ -e /etc/paswd ]; then echo ok; fi
  308  if [ -e /etc/passwd ] && [ -e /etc/passwd ]; then echo ok; fi
  309  [ -e /etc/passwd ] && { echo a; echo b; }
  310  [ -e /etc/paswd ] && { echo a; echo b; }
  311  [ -e /etc/passwd ] && (echo a; echo b)
  312  [ -e /etc/passwd ] && (cd /tmp; echo a; echo b)
  313  [ -e /etc/passwd ] && { cd /tmp; echo a; echo b; }
  314  cd -
  315  [ -e /etc/passwd ] && {cd /tmp; echo a; echo b; }
  316  [ -e /etc/passwd ] && {cd /tmp; echo a; echo b }
  317  [ -e /etc/passwd ] && { cd /tmp; echo a; echo b };  };
  318  fun() { echo hello world; ls }
  319  fun() { echo hello world; ls; }
  320  fun
  321  fun() { echo hello world $1; ls "$2"; }
  322  fun
  323  fun hi
  324  fun hi ~
  325  function fun() { echo hello world $1; ls "$2"; }
  326  fun() { echo hello world $1; ls "$2"; }
  327  fun() { echo hello world $1; ls "$2"; }
  328  fun | tr a b
  329  fun | tr e e
  330  fun | tr e E
  331  fun() { echo hello world $1; ls "$2"; return 1; }
  332  echo $?
  333  fun
  334  echo $?
  335  fun() { echo hello world $1; ls "$2"; return 0; }
  336  fun
  337  echo $?
  338  ls
  339  cd ~
  340  ls
  341  vi skript.sh 
  342  fun() { a=1 echo hello world $1; ls "$2"; return 0; }
  343  fun() { a=1; echo hello world $1; ls "$2"; return 0; }
  344  echo $a
  345  fun
  346  echo $a
  347  fun() { local a; a=2; echo hello world $1; ls "$2"; return 0; }
  348  echo $a
  349  fun
  350  echo $a
  351  ./design1.sh 
  352  vim ./design1.sh 
  353  cat ./design1.sh 
  354  ./design1.sh 
  355  vim design2.sh 
  356  ls -l
  357  exit
  358  xrandr
  359  vim code1.sh
  360  rm \\
  361  fg
  362  vi design2.sh \
  363  vi design2.sh 
  364  vim code1.sh
  365  fg
  366  vim code1.sh
  367  getent passwd
  368  getent passwd | sort
  369  getent passwd | sort | less
  370  getent passwd | sort 
  371  getent passwd | sort -t: -k3
  372  getent passwd | sort -t: -k3 -n
  373  getent passwd | 
  374  getent passwd | sort -t: -k3 -n | less
  375  getent passwd | cut -d: -f 7 
  376  getent passwd | cut -d: -f 7 | uniq
  377  getent passwd | cut -d: -f 7 | sort | uniq
  378  getent passwd | cut -d: -f 7 | sort | uniq -c
  379  getent passwd 
  380  getent passwd | cut -d: -f 5
  381  getent passwd | cut -d: -f 5 | cut -d" " -f 1
  382  getent passwd | cut -d: -f 5 | cut -d" " -f 1 | sort | uniq -c
  383  getent passwd | cut -d: -f 5 | cut -d" " -f 1 | sort | uniq -c | sort -n -r
  384  getent passwd | cut -d: -f 5 | cut -d" " -f 1 | sort | uniq -c | sort -n -r | head
  385  getent passwd | less
  386  getent passwd | cut -d: -f 5 | cut -d" " -f 2 | sort | uniq -c | sort -n -r | head
  387  getent passwd | cut -d: -f 5 | rev | cut -d" " -f 1 | rev | sort | uniq -c | sort -n -r | head
  388  getent passwd | cut -d: -f 5 | sort | uniq -c | sort -n -r | head
  389  ls -l
  390  rm y-modified.sh 
  391  cp y.txt y-modified.txt
  392  cat y.txt 
  393  vim y-modified.txt
  394  diff y.txt y-modified.txt
  395  diff -u y.txt y-modified.txt
  396  find
  397  find /tmp
  398  find /tmp -name '*.txt'
  399  find . -name '*.txt'
  400  find . -name 'a*'
  401  man find
  402  stat text
  403  stat text.txt 
  404  stat -c %s text.txt 
  405  x=$(stat -c %s text.txt)
  406  echo $((x/10))
  407  var1=abcdefghi
  408  echo ${#var1}
  409  echo ${var1}
  410  echo ${#var1}
  411  echo ${var1#abc}
  412  echo ${var1#abd}
  413  echo ${var1#*d}
  414  var1=abcdefghiabcdefghi
  415  var1=abcdefghiabcdefghi
  416  echo ${var1}
  417  echo ${var1#*d}
  418  echo ${var1##*d}
  419  echo ${var1}
  420  echo ${var1%ghi}
  421  echo ${var1%ghj}
  422  echo ${var1%e*}
  423  echo ${var1%%e*}
  424  if [ "$var1" = "${var1#a}" ]; then echo nezacina a-ckem; fi
  425  if ! [ "$var1" = "${var1#a}" ]; then echo zacina a-ckem; fi
  426  filename=y-modified.txt 
  427  echo $filename
  428  echo "${filename%.txt}.sh"
  429  echo "${filename%.*}.sh"
  430  mv "$filename" "${filename%.*}.sh"
  431  ls -l
  432  echo "$filename"
  433  echo "${filename/d/x}"
  434  echo "${filename//d/x}"
  435  echo "${filename//i?/__}"
  436  echo a; echo b
  437  [ -e /etc/passwd ] || echo lala
  438  [ -e /etc/paswd ] || echo lala
  439  [ -e /etc/passwd ] && echo lala
  440  [ -e /etc/paswd ] && echo lala
  441  [ -e /etc/passwd ] && { echo a; echo b; }
  442  [ -e /etc/passwd ] && (echo a; echo b)
  443  [ -e /etc/passwd ] && (cd /tmp; echo a; echo b)
  444  [ -e /etc/passwd ] && (cd /tmp; echo a; pwd)
  445  [ -e /etc/passwd ] && { cd /tmp; echo a; pwd; }
  446  cd -
  447  [ -e /etc/passwd ] && {cd /tmp; echo a; pwd }
  448  [ -e /etc/passwd ] && { cd /tmp; echo a; pwd };  ;|
  449  [ -e /etc/passwd ] && { cd /tmp; echo a; pwd };  ;|
  450  [ -e /etc/passwd ] && { cd /tmp; echo a; pwd };  }
  451  cd -
  452  fun() { echo a; ls; }
  453  fun
  454  fun() { echo a $1; ls $2; }
  455  fun ahoj /tmp
  456  fun() { echo a $1; ls $2; return 0; }
  457  fun; echo $?
  458  fun() { echo a $1; ls $2; return 1; }
  459  fun; echo $?
  460  fun() { var=1; echo a $1; ls $2; return 1; }
  461  fun
  462  echo $var
  463  fun() { local var; var=2; echo a $1; ls $2; return 1; }
  464  fun
  465  echo $var
  466  function fun() { local var; var=2; echo a $1; ls $2; return 1; }
  467  fun() { local var; var=2; echo a $1; ls $2; return 1; }
  468  echo Hello | grep Hello
  469  echo Hello | grep 'H.*o'
  470  echo aHelwloe | grep 'H.*o'
  471  echo aHelwle | grep 'H.*o'
  472  echo aHelwloe | grep '^H.*o$'
  473  echo Helwlo | grep '^H.*o$'
  474  echo Hello | grep '^Hel*o$'
  475  echo Hellllllllo | grep '^Hel*o$'
  476  echo Heo | grep '^Hel*o$'
  477  echo Heo | grep '^[Hh]el*o$'
  478  echo heo | grep '^[Hh]el*o$'
  479  echo heo | grep '.'
  480  echo | grep '.'
  481  echo abc@xyz | grep '^.*@.*$'
  482  echo abc@xyz.cz | grep '^.*@.*$'
  483  echo abc@xyz.cz | grep '^.*@.*\..*$'
  484  echo abc@xyz | grep '^.*@.*\..*$'
  485  echo "a abc@xyz.cz x" | grep '^.*@.*\..*$'
  486  echo "a abc@xyz.cz x" | grep '^[a-z0-9.+-]*@[a-z0-9.-]*\.[a-z0-9.-]*$'
  487  echo "abc@xyz.cz" | grep '^[a-z0-9.+-]*@[a-z0-9.-]*\.[a-z0-9.-]*$'
  488  echo "abc@felk.c-v-u-t.cz" | grep '^[a-z0-9.+-]*@[a-z0-9.-]*\.[a-z0-9.-]*$'
  489  chmod +x code1.sh 
  490  ./code1.sh 
  491  ./code1.sh 
  492  ./code1.sh 
  493  ./code1.sh 
  494  ./code1.sh 
  495  ./design2.sh 
  496  ./design2.sh -h
  497  help getopts
  498  ./design2.sh -h\
  499  ./design2.sh -a
  500  ./design2.sh -b 10 -a
  501  man regex
  502  man 7 regex
  503  man pcre
  504  echo 'abc@xyz.cz' | egrep '^[a-zA-Z0-9.+_-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2-4}$'
  505  echo 'abc@xyz.cz' | egrep '^[a-zA-Z0-9.+_-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,4}$'
  506  echo 'abc@x*yz.cz' | egrep '^[a-zA-Z0-9.+_-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,4}$'
  507  echo 'a2b+c@x-y.ez.cz' | egrep '^[a-zA-Z0-9.+_-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,4}$'
  508  echo 'kok a2b+c@x-y.ez.cz ancdefeefe' | egrep '^[a-zA-Z0-9.+_-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,4}$'
  509  echo 'kok a2b+c@x-y.ez.cz ancdefeefe' | egrep '[a-zA-Z0-9.+_-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,4}'
  510  echo 'kok a2b+c@x-y.ez.cz ancdefeefe' | egrep -o '[a-zA-Z0-9.+_-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,4}'
  511  echo "Petr Baudis" | sed 's/Petr/Pavel/'
  512  cd ~
  513  echo "Petr Baudis" | sed 's/Petr/Pavel/'
  514  echo "Petr Baudis" | sed 's#Petr#Pavel#'
  515  echo "Petr Baudis" | sed 's/Petr/Pavel/'
  516  getent passwd # | sed 's/Petr/Pavel/'
  517  getent passwd | sed 's/Petr/Pavel/'
  518  getent passwd | sed 's/M[^ ]*/Pavel/'
  519  getent passwd #| sed 's/M[^ ]*/Pavel/'
  520  getent passwd | sed 's/M[^ ]*/Pavel/'
  521  getent passwd | sed 's/M[^ :]*/Pavel/'
  522  getent passwd | sed -r 's/M([^ :]*)/P\1/'
  523  getent passwd | sed -r 's/.*M([^ :]*).*/P\1/'
  524  getent passwd #| sed -r 's/.*M([^ :]*).*/P\1/'
  525  getent passwd | sed -r 's/.*M([^ :]*).*/P\1/'
  526  getent passwd | sed -nr 's/.*M([^ :]*).*/P\1/'
  527  getent passwd | sed -nr 's/.*M([^ :]*).*/P\1/p'
  528  man sed
  529  ps axu | awk '{ print $2 }'
  530  ps axu | awk '/^root/ { print $1 } { print $2 }'
  531  ps axu
  532  ps axu | awk '/^root/ { print "Ahoj" } { print $2 }'
  533  ps axu | awk 'BEGIN { x = 0 } /^root/ { x += $2 } { print $2 } END { print "Sum is" $x }'
  534  ps axu | awk 'BEGIN { x = 0 } /^root/ { x += $2 } { print $2 } END { print "Sum is" x }'
  535  ps axu | awk 'BEGIN { x = 0 } /^root/ { x += $2 } { print $2 } END { print "Sum is " x }'
  536  ps axu | awk 'BEGIN { x = 0 } /^root/ { x ++ } { print $2 } END { print "Count is " x }'
  537  cd Downloads/
  538  ls -l
  539  cd aim-kit
  540  ls -l
  541  vi statistics.awk 
  542  history >>/tmp/h.txt