bash scripting march 23

[student@localhost ~]$ history
    1  echo $key
    2  exit
    3  echo $newvar
    4  exit
    5  cd bash-scripting/
    6  ./countdown 3
    7  ./countdown 12
    8  ./countdown 14
    9  sudo dnf update -y
   10  key=value
   11  echo $key
   12  bash
   13  export newvar=red
   14  echo $newvar
   15  bash
   16  which bash
   17  echo $SHELL
   18  echo ${SHELL}
   19  echo ${SHELL}123
   20  echo $SHELL123
   21  export newvar=
   22  ls
   23  echo $?
   24  ls iuhiugiugh
   25  echo $?
   26  echo $SHELL
   27  chsh
   28  vim hello
   29  hello
   30  echo $PATH
   31  pwd
   32  ./hello
   33  ls -l
   34  chmod +x hello
   35  ./hello
   36  history
   37  sudo dnf install -y git
   38  git clone https://github.com/sandervanvugt/bash-scripting
   39  cd bash-scripting/
   40  ls
   41  help
   42  history
   43  cd
   44  touch my file
   45  ls
   46  touch "my file"
   47  ls
   48  echo the current $SHELL is $SHELL
   49  echo 'the current $SHELL' is $SHELL
   50  echo the current \$SHELL is $SHELL
   51  ls
   52  cd bash-scripting/
   53  cat script1
   54  cat script2
   55  declare -r ANSWER=yes
   56  echo $ANSWER
   57  ANSWER=no
   58  ls
   59  vim readtit
   60  ./readtit
   61  chmod +x readtit
   62  ./readtit
   63  cat readtit
   64  pwd
   65  . readtit
   66  pwd
   67  cd
   68  vim myverycomplexdemoscript
   69  vim colors
   70  vim myverycomplexdemoscript
   71  chmod +x myverycomplexdemoscript
   72  ./myverycomplexdemoscript
   73  vim myverycomplexdemoscript
   74  vim colors
   75  ./myverycomplexdemoscript
   76  cd bash-scripting/
   77  ls
   78  ./countdown 12
   79  cat countdown
   80  vim countdown
   81  echo $(( 2 x 4 ))
   82  echo $(( 2 * 4 ))
   83  echo $(( 2 - 4 ))
   84  echo $(( 2 / 4 ))
   85  vim countdown
   86  ./countdown 0
   87  vim countdown
   88  ls -l
   89  chmod +x script*
   90  vim script3
   91  cat script3
   92  ./script3 a b c d e f g h i j k l
   93  ./script3 a b
   94  vim script4
   95  .sc
   96  ./script4 a b c d
   97  cat script4
   98  vim script4
   99  ./script4 a b c d
  100  vim script4
  101  date +%d-%m-%y
  102  sudo tar cvf backup-$(date +%d-%m-%y).tar /etc
  103  ls -lrt
  104  sudo tar cvf backup-`date +%d-%m-%Y`.tar /etc
  105  ls -lrt
  106  ls
  107  vim setupftp
  108  ./setupftp
  109  cat setupftp
  110  ls -l hosts
  111  vim script6
  112  ./script6 /usr/bin/blah
  113  vim script6
  114  ./script6 /usr/nbin/blah
  115  cat script7
  116  ls
  117  cat pm
  118  vim pm
  119  ./pm
  120  cat script7
  121  vim quick
  122  for i in $(cat quick); do echo $i; done
  123  for i in $(cat quick); do echo $i | tr [:lower:] [:upper:] ; done
  124  echo $(( 3 * 3 ))
  125  man test
  126  test -f iuhiug
  127  echo $?
  128  test -f trapme
  129  echo $?
  130  vim countdown
  131  ./countdown
  132  vim countdown
  133  ./countdown
  134  echo $?
  135  ./countdown 1
  136  vim countdown
  137  ./countdown
  138  vim countdown
  139  [ -f blah ] && echo blah exists
  140  [ -f blah ] || echo blah exists
  141  vim countdown
  142  ./countdown
  143  ./countdown 1
  144  vim countdown
  145  vim else1
  146  vim else2
  147  vim script10
  148  vim numeric
  149  vim script10
  150  vim script
  151  vim script10
  152  ./script10 5
  153  vim numcheck
  154  ./numcheck
  155  vim numcheck
  156  vim for
  157  cd
  158  git clone https://github.com/sandervanvugt/rhce8-live
  159  cd rhce8-live/
  160  find . -name "*yaml"
  161  cd ..
  162  mkdir rhce9-live
  163  vim moveyaml.sh
  164  chmod +x moveyaml.sh
  165  ./moveyaml.sh
  166  vim moveyaml.sh
  167  ./moveyaml.sh
  168  vim moveyaml.sh
  169  ./moveyaml.sh
  170  vim moveyaml.sh
  171  ./moveyaml.sh
  172  vim moveyaml.sh
  173  ./moveyaml.sh
  174  ls rhce9-live/
  175  cat moveyaml.sh
  176  echo hello | tr [:lower:] [:upper:]
  177  echo hello | tr [a-k] [l-z]
  178  vim case
  179  cd bash-scripting/
  180  vim case
  181  ./case
  182  vim case
  183  ./case
  184  vim case
  185  ./case
  186  vim case
  187  ./case
  188  cat script11
  189  ./script11 1
  190  vim script11
  191  ./script11 1
  192  vim script11
  193  ./script11 1
  194  bash -x script11 1
  195  vim script11
  196  bash -x script11 1
  197  ls
  198  vim 1_cpu-hog
  199  lscpu
  200  sudo -i
  201  ls
  202  while true; do true; done &
  203  ./1_cpu-hog
  204  vim 1_cpu-hog
  205  ./1_cpu-hog
  206  vim 1_cpu-hog
  207  ./1_cpu-hog
  208  journalctl
  209  fg
  210  vim 1_cpu-hog
  211  ./1_cpu-hog
  212  vim 1_cpu-hog
  213  ./1_cpu-hog
  214  cat 1_cpu-hog
  215  grep reboot *
  216  ls
  217  cd ..
  218  git clone https://github.com/sandervanvugt/coolbash
  219  git clone https://github.com/sandervanvugt/coolscripts
  220  git clone https://github.com/sandervanvugt/cool-bash
  221  cd cool-bash/
  222  ls
  223  vim 4b_reboot.sh
  224  sudo ./4b_reboot.sh
  225  ls -lrt /tmp
  226  history