bash june23

    1  echo $SHELL
    2  env
    3  echo $USER
    4  echo $PATH
    5  key=value
    6  echo $key
    7  bash
    8  export key=vlaue
    9  echo $key
   10  bash
   11  echo ${key}
   12  echo ${key}1
   13  echo $key1
   14  ls
   15  echo $?
   16  ls uhiuhgiuiuh
   17  echo $?
   18  vim hello
   19  ls -l hello
   20  ./hello
   21  chmod +x hello
   22  ./hello
   23  history
   24  hello
   25  echo $PATH
   26  ./hello
   27  history
   28  cat hello
   29  echo $PATH
   30  echo $SHELL
   31  chsh --help
   32  #chsh -s /bin/bash
   33  help
   34  type ls
   35  type useradd
   36  type shift
   37  which tcsh
   38  which csh
   39  sudo dnf install zsh
   40  chsh -s /bin/zsh
   41  echo $SHELL
   42  grep student /etc/passwd
   43  history
   44  chsh -s /bin/bash
   45  grep student /etc/passwd
   46  vim changeshell
   47  chmod +x changeshell
   48  ./changeshell
   49  mkdir newdir
   50  cd newdir/
   51  touch my file
   52  ls -l
   53  touch "my file"
   54  ls
   55  echo "the current $SHELL is $SHELL"
   56  echo 'the current $SHELL is $SHELL'
   57  echo "the current \$SHELL is $SHELL"
   58  cd
   59  sudo dnf install git -y
   60  git clone https://github.com/sandervanvugt/bash-scripting
   61  cd bash-scripting/
   62  ls
   63  du -hs
   64  cat countdown
   65  ./countdown 12
   66  vim countdown
   67  $((2+4))
   68  echo $((2+4))
   69  vim countdown
   70  echo (( 2 + 4 ))
   71  echo $(( 2 + 4 ))
   72  set a=3
   73  set a=3; $(( a * 2 ))
   74  a=3
   75  $((a * 2))
   76  echo $((a * 2))
   77  echo $(($a * 2))
   78  declare -r STATE=yes
   79  echo $STATE
   80  STATE=green
   81  ls
   82  vim readit
   83  ./readit
   84  chmod +x *
   85  ./readit
   86  pwd
   87  vim sourceit
   88  chmod +x sourceit
   89  ./sourceit
   90  vim vars
   91  ./sourceit
   92  vim vars
   93  ./sourceit
   94  ls -l /etc/sysconfig/
   95  cat /etc/sysconfig/raid-check
   96  history
   97  vim script3
   98  ./script3 a b c d e f g h i j k l m n
   99  cat script3
  100  export AWS_SECRET_KEY=abcde
  101  vim script4
  102  ./script4 a b c d
  103  vim script4
  104  for user in bob bill betty; do echo the username is $user; done
  105  history
  106  tar -czvf /tmp/backup-$(date +%d-%m-%y).tgz /etc
  107  ls -l /tmp
  108  history
  109  man date
  110  cd /usr/lib
  111  ls
  112  cd ../lib64
  113  ls
  114  cd ..
  115  cd lib
  116  ls
  117  cd mod
  118  cd modules
  119  ls
  120  uname -r
  121  ls -l $(uname -r)
  122  ls -l `uname -r`
  123  cd
  124  cd bash-scripting/
  125  ./countdown 12
  126  ls
  127  vim setupftp
  128  ./setupftp
  129  ls
  130  cd ..
  131  git clone https://github.com/sandervanvugt/cka
  132  cd cka/
  133  ls
  134  vim setup-container.sh
  135  cd ..
  136  history
  137  cd bash-scripting/
  138  vim script6
  139  ./script6 /usr/bin/whatever
  140  vim script6
  141  ./script6 /usr/bin/blah
  142  vim script7
  143  echo $(( 2 * 19 ))
  144  man test
  145  test -f /etc/hosts
  146  echo $?
  147  [ -f /etc/hosts ]
  148  echo $?
  149  [ -f /etc/hostwegwegs ]
  150  echo $?
  151  if [ -f /etc/hosts ]; then it exists; fi
  152  if [ -f /etc/hosts ]; then echo it exists; fi
  153  if [-f /etc/hosts]; then echo it exists; fi
  154  cd/etc
  155  if [ -f /etc/hosts]; then echo it exists; fi
  156  if [ -f /etc/hostwergers ]; then echo it exists; fi
  157  [ -f /etc/hosts ] && echo it exists
  158  [ -f /etc/hosts ] || echo it exists
  159  [ -f /etc/hoguyfguysts ] || echo it exists
  160  vim /etc/bashrc
  161  ./countdown 12
  162  ls
  163  vim else1
  164  ./else1
  165  ./else1 hh
  166  vim else2
  167  ./else2 h
  168  ./else2 /etc/hosts
  169  vim else2
  170  ./else2 uguiiug
  171  ./else2 /etc/hosts
  172  vim numcheck
  173  ./numcheck
  174  vim script10
  175  ./script10 5
  176  man true
  177  vim script11
  178  ./script11
  179  bash -x script11
  180  vim script11
  181  ./script11
  182  bash -x ./script11
  183  vim script11
  184  ./script11
  185  ./script11 1
  186  vim script11
  187  ./script11 1
  188  ls
  189  vim 1_cpu-hog
  190  ps -eo pcpu,pid -o comm=
  191  vim 1_cpu-hog
  192  ./1_cpu-hog
  193  vim 1_cpu-hog
  194  ./1_cpu-hog
  195  vim 1_cpu-hog
  196  ./1_cpu-hog
  197  vim 1_cpu-hog
  198  ./1_cpu-hog
  199  vim 1_cpu-hog
  200  ls
  201  vim case
  202  ./case
  203  vim case
  204  ./case
  205  vim /etc/bashrc
  206  history