用shell脚本判断是否为root用户

此脚本利用bash内建变量$UID来判断当前用户是否为root用户



#!/bin/bash
#am-i-root.sh

ROOT_UID=0

if [ "$UID" -eq "$ROOT_UID" ]
then
  echo "You are root."
else
  echo "You are just an ordinary user (but mom loves you as the same)."
fi

exit 0
#==========================================
#another way to judge if you are the root

#ROOTUSER_NAME=root

#username=`id -nu`    #or username=`whoami`
#if [ "$username"="$ROOTUSER_NAME" ]
#then
#  echo "Rooty,toot,toot.You are root."
#else
#  echo "You are just a regular fella."
#fi