bash4h july21

   99  git  clone https://github.com/sandervanvugt/bash-scripting
  100  cd bash-scripting/
  101  ls
  102  cat script1
  103  history
  104  echo she-bang
  105  echo STARTING B4H
  106  history
  107  env
  108  mycolor=red
  109  echo $mycolor
  110  bash
  111  export mycolor=blue
  112  bash
  113  sudo vim /etc/profile
  114  ls /etc/profile.d/
  115  sudo vim /etc/bash.bashrc
  116  cd
  117  ls -a
  118  cat .profile
  119  cat .bashrc
  120  cd bash-scripting/
  121  history
  122  echo $mycolor
  123  echo ${mycolor}
  124  echo ${mycolor}123
  125  echo $mycolor123
  126  ls
  127  echo $?
  128  ls uhreiughiuhui
  129  echo $?
  130  man ls
  131  echo $mycolor
  132  mycolor=
  133  echo $mycolor
  134  MYPATH=$PATH
  135  echo $MYPATH
  136  MYPATH=$PATH:/usr/locla/whatever
  137  echo $MYPATH
  138  cat /etc/os-release
  139  echo $SHELL
  140  ls
  141  vim script1
  142  vim 1_cpu-hog
  143  time ./script12
  144  ls
  145  file pm
  146  script8
  147  pwd
  148  echo $PATH
  149  ./script8
  150  ./script1
  151  ls -l
  152  chmod +x script*
  153  ls -l
  154  ./script1
  155  vim hello
  156  ./hello
  157  bash hello
  158  cat hello
  159  ls
  160  cat hello-world
  161  help
  162  type true
  163  type pwd
  164  type time
  165  type ls
  166  type useradd
  167  echo the value of my $PATH is $PATH
  168  echo the value of my \$PATH is $PATH
  169  echo the value of my '$PATH' is $PATH
  170  ls
  171  vim script2
  172  ./script2
  173  cat script2
  174  vim script2
  175  source script2
  176  cd -
  177  . script2
  178  cd -
  179  ls
  180  ./countdown 12
  181  vim countdown
  182  ./countdown 0
  183  vim script10
  184  ssh [email protected]
  185  vim decouple.sh
  186  vim /tmp/colors
  187  chmod +x decouple.sh
  188  ./decouple.sh
  189  vim /tmp/colors
  190  ./decouple.sh
  191  ls
  192  mv readtit readit
  193  cat readit
  194  vim decouple.sh
  195  cat decouple.sh
  196  cat /tmp/colors
  197  echo $(( 10 * 60 ))
  198  echo ${ 10 * 60 }
  199  vim script3
  200  ./script3 a b c d e f g h i j k l
  201  vim script4
  202  cat script4
  203  ./script4 a b c d
  204  ./script4 a b c d e f g h i j k l m n o p q r s t
  205  vim makeuser.sh
  206  chmod +x makeuser.sh
  207  ./makeuser.sh
  208  ./makeuser.sh bob bill linda lisa
  209  cat makeuser.sh
  210  sudo -i
  211  echo mylog > $(date +%d-%m-%Y).log
  212  ls
  213  ssh [email protected]
  214  ls
  215  vim kube-setup.sh
  216  cd ..
  217  git clone https://github.com/sandervanvugt/cka
  218  cd cka
  219  vim setup-docker.sh
  220  ssh [email protected]
  221  cat /etc/os-release
  222  cd ../bash-scripting/
  223  vim detectos
  224  chmod +x detectos
  225  ./detectos
  226  vim detectos
  227  ./detectos
  228  vim detectos
  229  ./detectos
  230  cat detectos
  231  ssh [email protected]
  232  cat detectos
  233  ./countdown 12
  234  echo hello
  235  echo hello >/dev/null
  236  vim script10
  237  ./script10
  238  vim script10
  239  vim script6
  240  ./script6 /usr/bin/blah
  241  vim script6
  242  ./script6 /usr/bin/blah
  243  vim script7
  244  ./script7
  245  vim pm
  246  ./pm
  247  cat pm
  248  time pm
  249  time ./pm
  250  mv pm spm
  251  vim spm
  252  echo hello | sed 's/hello/bye/'
  253  vim spm
  254  ./spm
  255  time ./spm
  256  ./countdown 12
  257  man test
  258  test -f ihkih
  259  echo $?
  260  test -f /etc/hosts
  261  echo $?
  262  [ -f ihuih ]
  263  echo $?
  264  [ -f /etc/hosts ]
  265  echo $?
  266  vim script8
  267  cat /etc/passwd
  268  vim script8
  269  ./script8 st
  270  ./script8 student
  271  tail /etc/passwd
  272  tail /etc/passwd | cut -d : -f 1
  273  tail /etc/passwd | cut -f 1
  274  vim script8
  275  vim users
  276  grep ale users
  277  grep alex users
  278  grep '^alex$' users
  279  vim script8
  280  type bc
  281  vim script8
  282  vim script9
  283  ./script9
  284  echo $?
  285  vim script9
  286  ./script9
  287  echo $?
  288  vim script9
  289  ./script9 ih
  290  vim script8
  291  grep a* a*
  292  ls
  293  grep 'a*' s*
  294  grep a* s*
  295  vim script8
  296  cat script9
  297  [ -f /etc/hosts ] || echo doesnt exist
  298  [ -d /etc/hosts ] || echo doesnt exist
  299  [ -f /etc/hosts ] && echo does exist
  300  ssh [email protected]
  301  history
  302  vim script10
  303  ls
  304  vim script11
  305  ./script11 1
  306  vim script11
  307  bash -x script11
  308  vim script11
  309  ./script11 1
  310  vim script11
  311  ./script11 1
  312  bash -x ./script11 1
  313  vim script11
  314  ./script11 1
  315  vim script11
  316  ./script11 1
  317  vim script12
  318  ./script12
  319  vim script12
  320  echo hello | tr [a-z] [A-Z]
  321  echo hello | tr [:lower:] [:upper:]
  322  echo hello | tr [a-m] [n-z]
  323  echo hello | tr [a-z] [z-a]
  324  vim script12
  325  ./script12
  326  vim script12
  327  history