bash scripting oct20

##### showing includes
[root@localhost bash-scripting]# cat mainscript
#!/bin/bash

. includes

echo the color is $COLOR
[root@localhost bash-scripting]# cat includes
COLOR=red


##### SCRIPT 10 FIX
#!/bin/bash

COUNTER=$1
COUNTER=$(( COUNTER * 60 ))

minusone(){
        COUNTER=$(( COUNTER - 1 ))
        sleep 1
}

while [ $COUNTER -gt 0 ]
do
        echo you still have $COUNTER seconds left
        minusone
done

[ $COUNTER = 0 ] && echo time is up && minusone
[ $COUNTER = "-1" ] && echo you now are one second late && minusone

while true
do
        echo you now are ${COUNTER#-} seconds late
        minusone
done


#### HISTORY
root@localhost bash-scripting]# history
    1  yum install -y git vim bash-completion
    2  git clone https://github.com/sandervanvugt/bash-scripting
    3  history
    4  ls
    5  cd bash-scripting/
    6  ls
    7  vim script1
    8  vim ~/.vimrc
    9  vim script1
   10  vim ~/.vimrc
   11  vim script1
   12  ls /etc/hosts
   13  echo $?
   14  ls kejrhgkehrkhb
   15  echo $?
   16  vim script1
   17  script1
   18  echo $PATH
   19  ./script1
   20  ls -l
   21  chmod +x s*
   22  ls -l
   23  ./script1
   24  echo $?
   25  pwd
   26  echo $PATH
   27  PATH=$PATH:$(pwd)
   28  script1
   29  echo $PATH
   30  history
   31  vim script2
   32  script2
   33  pwd
   34  cat script2
   35  source script2
   36  cd bash-scripting/
   37  vim script2
   38  source script2
   39  pwd
   40  cd -
   41  . script2
   42  cd -
   43  yum install -y network-scripts
   44  ls
   45  vim mainscript
   46  vim includes
   47  chmod +x mainscript
   48  ./mainscript
   49  vim includes
   50  ./mainscript
   51  cat mainscript
   52  cat includes
   53  cd /etc/init.d/
   54  ls
   55  history | head
   56  vim network
   57  cd /etc/sysconfig/
   58  ls
   59  ls -l
   60  vim rsyslog
   61  cd
   62  cd bash-scripting/
   63  history
   64  file /usr/bin/passwd
   65  file /etc/hosts
   66  script1
   67  file script1
   68  grep COUNT *
   69  ./countdown 12
   70  vim script3
   71  ./script3 a b c d e f g h i j k l
   72  cat script3
   73  /root/bash-scripting/script3 a b c d e f g h i j k l
   74  true --help
   75  false --help
   76  vim script4
   77  ./script4 a b c d e
   78  cat script4
   79  vim ex5min.txt
   80  ./countdown 4
   81  vim ex5.sh
   82  bash ex5.sh bob bill joan
   83  cat ex5.sh
   84  ls
   85  vim script5
   86  vim script6
   87  ./script6 /usr/bin/blah
   88  vim script6
   89  ./script6 /usr/bin/blah
   90  ./countdown 12
   91  ls
   92  vim script7
   93  which sed
   94  ls -l /bin/sed
   95  ls -l /bin/awk
   96  ls -l /bin/gawk
   97  help
   98  vim script7
   99  vim script6
  100  history | grep PATH
  101  vim script5
  102  cd /lib/modules
  103  ls
  104  ls -l
  105  uname -r
  106  cd `uname -r`
  107  cd ..
  108  cd $(uname -r)
  109  cd
  110  cd bash-scripting/
  111  vim script5
  112  vim script8
  113  cut -d : -f 1 /etc/passwd
  114  vim script8
  115  useradd alexander
  116  useradd alex
  117  useradd xander
  118  ./script8 alex
  119  ./script8 lex
  120  cat script8
  121  cut -d : -f 1 /etc/passwd | grep alex >/dev/null && echo alex exists
  122  cut -d : -f 1 /etc/passwd | grep bea >/dev/null && echo alex exists
  123* cut -d : -f 1 /etc/passwd | grep bea >/dev/null || echo
  124  cut -d : -f 1 /etc/passwd | grep alex >/dev/null && echo alex exists || echo alex does not exist
  125  vim ex6.sh
  126  chmod +x ex6.sh
  127  ./ex6.sh lex
  128  ./ex6.sh alex
  129  cat ex6.sh
  130  man test
  131  vim script9
  132  ./script9
  133  echo $?
  134  ./script9 hello
  135  vim script10
  136  vim countdown
  137  ./countdown 1
  138  vim hv.sh
  139  chmod +x hv.sh
  140  ./hv.sh 1
  141  bash -x hv.sh 1
  142  vim hv.sh
  143  ./hv.sh
  144  ./hv.sh 1
  145  vim hv.sh
  146  ./hv.sh 5
  147  ./countdown 1
  148  echo $(( 4 + 4 ))
  149  echo $( 4 + 4 )
  150  ls $(which passwd)
  151  [ -f /etc/passwd ] && echo it exists
  152  [-f /etc/passwd] && echo it exists
  153  ls /etc/hosts
  154  ls/etc/hosts
  155  ./countdown 12
  156  vim script10
  157  ./script10 1
  158  wc script10
  159  bash -x script10
  160  vim script10
  161  ./script10 1
  162  vim script10
  163  ./script10 1
  164  bash -x ./script10 1
  165  vim script10
  166  ./script10 1
  167  vim script10
  168  ./script10 5
  169  vim script10
  170  ls
  171  vim kube-setup.sh
  172  cd ..
  173  git clone https://github.com/sandervanvugt/ckad
  174  cd ckad
  175  vim kube-setup.sh
  176  hostnamectl
  177  vim kube-setup.sh
  178  ./kube-setup.sh
  179  cd ../bash-scripting/
  180  ls
  181  cat rene
  182  vim rene
  183  ./rene
  184  cd /etc/init.d/
  185  vim network
  186  cd
  187  cd bash-scripting/
  188  ./countdown 5
  189  history