Shell Scripting
Shell Scripting Tutorial for Beginners 21 - Select loop
SELECT COMMAND Constructs simple menu from word list. It Allows user to enter a number instead of a word. So User enters sequence number correspondin…
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Shell Scripting
Shell Scripting Tutorial for Beginners 20 - FOR loop to execute commands
#!/bin/bash # for loops echo "all the files in directory--------" for item in * do if [ -f $item ] then echo $item fi done e…
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Shell Scripting
Shell Scripting Tutorial for Beginners 18 - FOR loop
Basic Syntax: for VARIABLE in 1 2 3 4 5 .. N do command1 command2 commandN done #OR----------------------------------------------- for VARIABLE in…
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Shell Scripting
Shell Scripting Tutorial for Beginners 18 - UNTIL loop
#!/bin/bash # until loops n=1 # first way echo "----until loops------first way-------------------" until [ $n -gt 10 ] do echo "$n…
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Shell Scripting
Shell Scripting Tutorial for Beginners 16 - using sleep and open termina...
#!/bin/bash # while loops n=1 while [ $n -le 3 ] do echo "$n" (( n++ )) gnome-terminal & done
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Shell Scripting
Shell Scripting Tutorial for Beginners 15 - WHILE Loops
#!/bin/bash # while loops n=1 # first way echo "----while loops------first way-------------------" while [ $n -le 10 ] do echo "$n…
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Shell Scripting
Shell Scripting Tutorial for Beginners 14 - Array variables
#! /bin/bash os=('ubuntu' 'windows' 'kali') os[6]='mac' unset os[2] echo "${os[@]}" echo "${os[0]}&quo…
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Shell Scripting
Shell Scripting Tutorial for Beginners 13 - The case statement Example
#! /bin/bash echo -e "Enter some character : \c" read value case $value in [a-z] ) echo "User entered $value a to z" …
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Shell Scripting
Shell Scripting Tutorial for Beginners 12 - The case statement
#! /bin/bash vehicle=$1 case $vehicle in "car" ) echo "Rent of $vehicle is 100 dollar" ;; "van" ) …
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Shell Scripting
Shell Scripting Tutorial for Beginners 11 - Floating point math operatio...
#! /bin/bash num1=20.5 num2=5 echo "$num1+$num2" | bc echo "$num1-$num2" | bc echo "20.5*5" | bc echo "scale=20;20…
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Shell Scripting
Shell Scripting Tutorial for Beginners 10 - Perform arithmetic operations
#! /bin/bash num1=20 num2=5 echo $(( num1 + num2 )) echo $(( num1 - num2 )) echo $(( num1 * num2 )) echo $(( num1 / num2 )) echo $(( num1 % num2 )) e…
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Shell Scripting
Shell Scripting Tutorial for Beginners 8 - Logical 'OR' Operator
#! /bin/bash age=60 # for using OR operator use || if [ "$age" -gt 18] || ["$age" -lt 30 ] then echo "valid age" el…
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Shell Scripting
Shell Scripting Tutorial for Beginners 8 - Logical 'AND' Operator
#! /bin/bash age=60 # for using And operator use && if [ "$age" -gt 18] && ["$age" -lt 30 ] then echo "val…
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Shell Scripting
Shell Scripting Tutorial for Beginners 7 - How to append output to the e...
#! /bin/bash echo -e "Enter the name of the file : \c" read file_name if [ -f $file_name ] then if [ -w $file_name ] then …
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Shell Scripting
Shell Scripting Tutorial for Beginners 6 - File test operators
#! /bin/bash echo -e "Enter the name of the file : \c" read file_name if [ -s $file_name ] then echo "$file_name not empty" el…
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Shell Scripting
Shell Scripting Tutorial for Beginners 5 - If Statement ( If then , If t...
Bash Shell Conditional Statements Conditionals let us decide whether to perform an action or not, this decision is taken by evaluating an expressi…
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Shell Scripting
Shell Scripting Tutorial for Beginners 4 - Pass Arguments to a Bash-Script
#! /bin/bash # $* Returns a single string (``$1, $2 ... $n'') # comprising all of the positional parameters # separated by the internal field…
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Shell Scripting
Shell Scripting Tutorial for Beginners 3 - Read User Input
#! /bin/bash echo "Enter name : " read name echo "Enterd name : $name" # Multiple inputs echo "Enter names : " read n…
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Shell Scripting
Shell Scripting Tutorial for Beginners 1 - using Variables and Comments
#! /bin/bash # this is a comment echo "Hello World" # this is also a comment echo Our shell name is $BASH echo Our shell version name is $B…
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