- The title given to this article is incorrect due to technical limitations. The correct title is sudo.
sudo (superuser do) is a program in Unix, Linux, and similiar operating systems that allows users to run programs as another user, normally the superuser.
Access to the program, and who can run which programs with it, is usually controlled by the /etc/sudoers file. In that file each user who can run sudo is listed, along with the programs they can run. Also, defaults and options for the program are changed and stored here.
By default, sudo asks the user for their password before running the target program as a security measure. Once a user has been authenticated, a time stamp is updated and the user may then use sudo without a password for a short period of time (five minutes unless overridden in sudoers).
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