VARIABLES IN SHELL SCRIPTING - LINUX / UNIX || LINUX SHELL SCRIPTING || VARAIBLES IN LINUX / UNIX

Variable - Alternate name for memory locations

Variable Names
1. Variable name should start with either alphabet or underscore
2. Variable name should not contain any special characters
other than underscore

Scalar Variables
Normal variables are scalar variables

Defining Variable
variable_name=variable_value / expression

Accessing Variables
prefix variable with $
Ex: a=10
$a

Read-only Variable
readonly variable_name

Unsetting Variable
unset variable_name

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