Use shell to check whether the current user is a superuser

Using shell to check whether the script is a super user UID is an important environment variable. it can be used to check whether the script is run as a super user or as a common user. For example, the code www.2cto.com is as follows :#! /Usr/bin/perlif [$ UID-ne0]; thenechonro...
Using shell to check whether the script is a super user UID is an important environment variable. it can be used to check whether the script is run as a super user or as a common user. For example, the code www.2cto.com is as follows :#! /Usr/bin/perl if [$ UID-ne 0]; thenecho Non root user. Please run as root. elseecho "Root user" fi note: the root user ID is 0.