Bash: Check for super user

By Mohammed Azirar on September 16, 2011 in Shell Scripting, Tips

UID is an important environment variable that can be used to check whether the current script has been run as root user or regular user. For example:

if [ $UID -ne 0 ]; then
    echo "Non root user. Please run as root."
else
    echo "Root user"
fi

The UID for the root user is 0.

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