Script ======================================================
[prabhucloudxlab@cxl$n4 ~]$ cat>shell-1.sh
[prabhucloudxlab@cxl$n4 ~]$ cat>shell-1.sh
#! /bin/bash
#----------- VARIABLES
#-----------system defined variables
echo $PWD # current working directory
echo $BASH # Bash shell name
echo $LOGNAME # Name of the Login User
#-----------User defined variables
name="prabhu"
job="QA-engineer"
echo $name and His job is $job
#Basic arithmetic using expr
echo "a=10, b=3"
echo "c is the value of addition c=a+b"
a=10
b=3
echo "c= `expr $a + $b`"
Output
[prabhucloudxlab@cxl$n4 ~]$ sh shell-1.sh
/home/adimulamvenkat19851609
/usr/bin/sh
adimulamvenkat19851609
prabhu and His job is QA-engineer
a=10, b=3
c is the value of addition c=a+b
c= 13
