Variables in Bash

 Variables in Bash

The bash variables are the same as in other programming languages. You don’t need to specify the type of variable in bash scripting. Read the below example.

#!/bin/bash

NAME="Test Tutorials"
echo $NAME

launchdate="Feb 08, 2013"
echo $launchdate

Global vs Local Variables

Global variables are accessible anywhere in the script. Where Local variables are accessible in scope only. For example, a variable is used inside a function only.

Shell

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#!/bin/bash #Define bash global variable   GLOBAL_VAR="global variable value"   function hello {     #Define bash local variable     local LOCAL_VAR="local variable value"     echo $LOCAL_VAR     echo $GLOBAL_VAR    ## This will accessible here } echo $LOCAL_VAR     ## This will not accessible here echo $GLOBAL_VAR

System Variables