Bash Programming Examples

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bash

echo "The last modified file is"
ls -t | head -1

Q5 gpg

bash

#!/bin/bash
# The script assumes that the passwords are stored in a file called 'dict'
# Note that after gpg executes you can check the result using the return code variable $?
cat words1.txt | while read PASS; do

    #  --batch  Represents input using the command line
    res=$(gpg --batch --passphrase $PASS -d secret.txt.gpg 2>/dev/null)
    
    if [ 0 -eq $? ] # if the return value is 0, then no error
    then
        echo YAY found secet! $res
        exit
    fi
done

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bash

# Hello World Program in Bash Shell
echo $#
echo "Hello World!"

greatest of three numbers

bash

# Hello World Program in Bash Shell
a=10
b=20
c=30
if [ $a -gt $b ]
then
if [ $a -gt $c ]
then
echo "$a is maximum"
else 
echo "$c is maximum"
fi
else
if [ $b -gt $c ]
then
echo "$b is maximum"
else
echo "$c is maximum"
fi
fi

arg foo 0.02

bash

# Hello World Program in Bash Shell
demo1(){
    echo "\$1: ${1}, \$2: ${2}"
}
demo2(){
  echo $1 | sed "s/.*\?s\([0-9]\+\)e\([0-9]\+\).*/S\1E\2.$2/i"
}
demo3(){
  local input=$1
  local ext=$2
  local pattern=".*\?s\([0-9]\+\)e\([0-9]\+\).*"
  echo $input | sed "s/${pattern}/S\1E\2.${ext}/i"
}



if [ -z "$1" ]; then
  bash -f $0 irgendetwasblabla-S01E01-blabla.srt mp4
  exit 0
fi
echo "\$1: ${1}, \$2: ${2}"
demo1 "bar" "foo"
demo2 $1 $2
demo3 $1 $2
echo "\$1: ${1}, \$2: ${2}"

arg foo 0.01

bash

# Hello World Program in Bash Shell
demo1(){
    echo "\$1: ${1}, \$2: ${2}"
}
demo2(){
  echo $1 | sed "s/.*\?s\([0-9]\+\)e\([0-9]\+\).*/S\1E\2.$2/i"
}
demo3(){
  input=$1
  ext=$2
  pattern=".*\?s\([0-9]\+\)e\([0-9]\+\).*"
  echo $input | sed "s/${pattern}/S\1E\2.${ext}/i"
}



if [ -z "$1" ]; then
  bash -f $0 irgendetwasblabla-S01E01-blabla.srt mp4
  exit 0
fi
echo "\$1: ${1}, \$2: ${2}"
demo1 "bar" "foo"
demo2 $1 $2
demo3 $1 $2
echo "\$1: ${1}, \$2: ${2}"

argument

bash

def get_parser():
    parser = argparse.ArgumentParser(description='scanless, public port scan scrapper')
    parser.add_argument('-v', '--version', help='display the current version',
                        action='store_true')
    parser.add_argument('-t', '--target', help='ip or domain to scan',
                        type=str)
    parser.add_argument('-s', '--scanner', help='scanner to use (default: hackertarget)',
                        type=str, default='hackertarget')
    parser.add_argument('-r', '--random', help='use a random scanner',
                        action='store_true')
    parser.add_argument('-l', '--list', help='list scanners',
                        action='store_true')
    parser.add_argument('-a', '--all', help='use all the scanners',
                        action='store_true')
return parser

sheel_test

bash

u=pwd
echo "enter the host::"
read h
su
system77
cd /home/$h
ls
echo "enter filename ::"
read f
cp $f $u
cat $u

1 Practical - (4 March 19)

bash

# Hello World Program in Bash Shell

echo "Hello World!"

date
cal
free
df
free
ls
mkdir Sandy
ls
cd
pwd
cd Sandy
mkdir Folder_One
cd
pwd

mkdir MarleySucks
ls
mkdir Playground
ls
cd Playground

ls
mkdir dir1

Execute Bash Shell Online

bash

# Test of STDIN input conversion

declare -a inputValues
function deleteEndLine {
   local size=${#1}
   let size-=1
   local final=${1:0:$size}
   echo "$final"
}

function readAllInputVariables {
   read endInput
   while [ "$endInput" != "ENDOFINPUT" ]
   do
      endInput="$(deleteEndLine $endInput)"
      inputValues+=($endInput)
      read endInput
   done
}

function baseSum {
   local basicSum=0
   if [$1 -eq 1];
   then
      basicSum=1
      echo "$basicSum"
   else
      local nextValue
      let nextValue=$1-1
      let basicSum=$1+"$(baseSum $nextValue)"
      echo "$basicSum"
   fi
}

readAllInputVariables
echo "ESTOY AQUIIIII"
finalSum="$(baseSum ${inputValues[0]})"
echo "$finalSum"

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