su — Run a shell with Substitute User

The Indian Patent Office has published a draft patent practice manual.
Read the draft and Email your suggestions to Mr Ramanraj K (ramanraj.k
at gmail dot com), before 15th of August 2005.
URL: http://gnowledge.org/pipermail/fsf-friends/2005-June/003381.html

One Day One Command
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su — Run a shell with Substitute User

Summary:

`su’ allows one user to temporarily become another user. ?It runs a
command with the Real & Effective user id, group id and supplemental
groups of a given user. If user not given, it will login as root.

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