./RNDTX

How to check the bash shell script is being by root or not

Sometimes it is necessary to find out if a shell script is being run as root user or not. When user account created a user ID is assigned to each user. BASH shell stores the user ID in $UID variable. Your effective user ID is stored in $EUID variable.

You can easily add a simple check at the start or a script

Using $ID Variable

#!/bin/bash
# Check root user
if [ "$(id -u)" != 0 ]; then
	echo "ERROR! Run this script with root user!"
	exit 1
fi

Using $EUID Variable

#!/bin/bash
# Check root user
if [[ $EUID -ne 0 ]]; then
	echo "ERROR! Run this script with root user!"
	exit 1
fi

Another Way From My Friends

From https://www.facebook.com/alun.esq165

#!/bin/bash
if [[ "$(whoami)" != "root" ]]; then
	echo "Bukan root"
	exit 1
fi
	echo "root"