Bash 4H dec20

t@localhost bash-scripting]# cat script2b
#!/bin/bash

. ./colors

echo the color is set to $COLOR
[root@localhost bash-scripting]# cat colors
COLOR=pink

######[root@localhost bash-scripting]# for i in lab{1..4}; do echo '########' $i; cat $i; done
######## lab1
cat: lab1: No such file or directory
######## lab2
[istacey@is-centos8-VM04 bash-scripting2]$ cat /home/istacey/sysconfig/planets
PLANET=mars
[istacey@is-centos8-VM04 bash-scripting2]$ cat planets.sh
#!/bin/bash
# Sourcing
. /home/istacey/sysconfig/planets
echo "Your current planet is $PLANET"
[istacey@is-centos8-VM04 bash-scripting2]$ ./planets.sh
Your current planet is mars
######## lab3
#!/bin/bash

echo useradd $1
######## lab4
#!/bin/bash

echo the number of arguments is $#

for file in "$@"
do
	touch $file
done
[root@localhost bash-scripting]# cat lab5
#!/bin/bash
touch $(date +%d-%m-%Y)
[root@localhost bash-scripting]# cat lab6
cat: lab6: No such file or directory
[root@localhost bash-scripting]# cat lab7
#!/bin/bash

NAME="$*"

echo The complete name is ${NAME}
echo The last name is ${NAME#*[[:space:]]}
echo The first name is ${NAME%' '*}

######[root@localhost bash-scripting]# cat lab7
#!/bin/bash

NAME="$*"

echo The complete name is ${NAME}
echo The last name is ${NAME#*[[:space:]]}
echo The first name is ${NAME%' '*}

[root@localhost bash-scripting]# cat laB8
#!/bin/bash
echo enter a name
read NAME

if useradd $NAME
then
	echo user created successfully
else
	echo user not created successfully
fi


#######[root@localhost bash-scripting]# cat script9b
#!/bin/bash

[ -z $1 ] && echo you have to provide && exit 9

echo the argument is $1

[ -f $1 ] && echo its a file || echo $1 is not a file

########[root@localhost bash-scripting]# cat lab9
#!/bin/bash

if ! [[ $(stat -c "%A" /etc/shadow) =~ "r" ]]
then
	echo read permission is not set
else

	echo read permission is set
fi
[root@localhost bash-scripting]# cat lab10
#!/bin/bash

[ $1 ] || echo give a number && read NUM

while [ $NUM -gt 0 ]
do
        touch $NUM
        NUM=$(( NUM - 1 ))
done

######[root@localhost bash-scripting]# cat script12
#!/bin/bash

echo are you good?

read GOOD

GOOD=$(echo $GOOD | tr [:upper:] [:lower:])

case $GOOD in
yes|oui)
	echo that\'s nice
	;;
no)
	echo that\'s not so nice
	;;
*)
	echo okay
	;;
esac

###HISTORY    1  yum install -y git vim bash-completion
    2  git clone https://github.com/sandervanvugt/bash-scripting
    3  cd bash-scripting/
    4  ls
    5  vim script1
    6  script1
    7  echo $PATH
    8  pwd
    9  ./script1
   10  chmod +x script1
   11  ./script1
   12  ls
   13  echo $?
   14  ls kuerhiughiuhuih
   15  echo $?
   16  help
   17  cd /usr/bin
   18  ls
   19  which ls
   20  which cd
   21  type cd
   22  type ls
   23  echo $?
   24  cd
   25  cd bash-scripting/
   26  ./countdown 2
   27  vim lab1.sh
   28  chmod +x lab1.sh
   29  ./lab1.sh
   30  cat lab1.sh
   31  ls
   32  vim script2
   33  ./script2
   34  chmod +x script*
   35  ./script2
   36  cat script2
   37  . script2
   38  pwd
   39  cd -
   40  vim script2b
   41  vim colors
   42  chmod + script2b
   43  ./script2b
   44  chmod +x script2b
   45  ./script2b
   46  vim colors
   47  ./script2b
   48  yum search network
   49  yum search network | grep script
   50  yum install -y network-scripts
   51  cd /etc/init.d
   52  ls
   53  vim network
   54  cd /etc/sysconfig/
   55  ls
   56  cd network-scripts/
   57  ls
   58  cat ifcfg-ens33
   59  cd
   60  cd bash-scripting/
   61  vim script2
   62  cat script2b
   63  cat colors
   64  ./countdown 12
   65  history
   66  sleep 30; ./countdown 11
   67  vim lab2
   68  vim script3
   69  ./script3 a b c d e f g h i j k l m n b
   70  cat script3
   71  vim script3
   72  ./script3 a b c d e f g h i j k l m
   73  grep '^root$' /etc/* 2>/dev/null
   74  ./countdown 3
   75  vim lab3
   76  chmod +x lab3
   77  vim lab3
   78  ./lab3 sander van vugt
   79  ./lab3 "sander van vugt"
   80  vim script4
   81  ./script4 a  b c d
   82  vim script4
   83  ./script4 a  b c d
   84  vim script4
   85  touch hello
   86  ls -l hello
   87  ./countdown 3
   88  vim lab4
   89  chmod +x lab4
   90  ./lab4
   91  ./lab4 a b c d
   92  ls
   93  for i in a b c d; do rm $i; done
   94  for i in a b c d; do rm -f $i; done
   95*
   96  ls
   97  for i in lab{1..4}; do cat $i; done
   98  for i in lab{1..4}; do echo ######## $i; cat $i; done
   99  for i in lab{1..4}; do echo '######## $i'; cat $i; done
  100  for i in lab{1..4}; do echo '########' $i; cat $i; done
  101  history
  102  vim script5
  103  cd /lib/modules
  104  ls
  105  ls -l
  106  uname -r
  107  cd ~/bash-scripting/
  108  vim script5
  109  ./script5
  110  ./countdown 2
  111  date
  112  date +%d-%m-%Y
  113  vim lab5
  114  chmod +x lab5
  115  ./lab5
  116  ls
  117  vim script6
  118  ./script6 /usr/bin/blah
  119  vim script6
  120  ./script6 /usr/bin/blah
  121  cat script7
  122  ./countdown 3
  123  vim lab7
  124  chmod +x lab7
  125  ./lab7 sander van
  126  vim lab7
  127  ./lab7 sander van
  128  vim lab7
  129  ./lab7 sander van
  130  vim lab7
  131  ./lab7 sander van
  132  vim lab7
  133  ./lab7 sander van
  134  vim lab7
  135  ./lab7 sander van
  136  vim lab7
  137  cat lab5
  138  cat lab6
  139  cat lab7
  140  vim script7
  141  vim script8
  142  cut -d : -f 1 /etc/passswd
  143  cut -d : -f 1 /etc/passwd
  144  useradd alexander
  145  useradd alex
  146  useradd lex
  147  useradd xander
  148  grep lex /etc/passwd
  149  cut -f 1 -d : /etc/passwd | grep '^lex$'
  150  ./script8 lex
  151  ./script8 alexa
  152  vim /etc/init.d/network
  153  vim script8
  154  ./script8 alexa
  155  ./script8 alex
  156  vim script8
  157  ./countdown 2
  158  vim laB8
  159  chmod +x laB8
  160  ./laB8
  161  vim laB8
  162  ./laB8
  163  vim laB8
  164  ./laB8
  165  cat lab7
  166  cat laB8
  167  man test
  168  test -f /etc/hosts
  169  echo $0
  170  echo $?
  171  test -f /etc/hosts
  172  echo $?
  173  test -f kuwrhkug
  174  echo $?
  175  [ -f khiuhiuh ]
  176  echo $?
  177  [ -f /etc/hosts ]
  178  echo $?
  179  man test
  180  [[ -f /etc/hosts ]]
  181  echo $?
  182  [[ -f khkuhkuh ]]
  183  echo $?
  184  [ 0 == 0 ]
  185  [ 0 == 1 ]
  186  echo $?
  187  [[ 0 == 1 ]]
  188  vim script9
  189  ./script9
  190  ./script9 juh
  191  vim script9b
  192  chmod +x script9b
  193  ./script9b
  194  ./script9b khk
  195  vim script9b
  196  ./script9b khk
  197  ./script9b /etc/hosts
  198  vim script9b
  199  ./script9b /etc/hosts
  200  ./script9b khk
  201  cat script9b
  202  vim /etc/init.d/network
  203  ./countdown 12
  204  [ -r /etc/shadow ] && echo "File is insecure" || echo "File is secure"
  205  ls -l /etc/shadow
  206  man test
  207  [ -w /etc/shadow ] && echo "File is insecure" || echo "File is secure"
  208  [ -x /etc/shadow ] && echo "File is insecure" || echo "File is secure"
  209  vim countdown
  210  vim script10
  211  ./script10 5
  212  ./countdown 5
  213  vim lab9
  214  ./lab9
  215  vim lab9
  216  vim lab10
  217  ./lab10
  218  chmod +x lab10
  219  ./lab10
  220  ls
  221  cat lab9
  222  cat lab10
  223  vim script11
  224  ./script11 1
  225  bash -x ./script11 1
  226  vim script11
  227  ./script11
  228  bash -x ./script11 1
  229  vim script11
  230  ./script11
  231  bash -x ./script11
  232  vim script11
  233  ./script11
  234  ./script11 1
  235  vim script11
  236  vim script12
  237  ./script12
  238  vim script12
  239  ./script12
  240  vim script12
  241  ./script12
  242  cat script12
  243  history