bash set command as variable code example

Example 1: store result of command in variable bash

variable=$(command [option…] argument1 arguments2 …)

Example 2: bash set environment variable

# Linux - Bash

# syntax 
# export *<variable-name>=*<variable-value>;

# example 
export ORACLE_SID='sales_database';

Example 3: bash store script output in variable

#Just use following structure to store output of command into a variable:
var=$(command)
#For example:
var=$(echo 'hi')	#store hi into var
var=$(ls)	#store list of files into var