Definition: login: System login tools These tools are required to be able to login and use your system. The login program invokes you user shell and enables command execution. The newgrp program is used to change your effective group ID (useful for workgroup type situations). The su program allows changing your effective user ID (useful being able to execute commands as another user). Also supplies a logout daemon that can place limits on when, from where, and for how long certain users can login to the system.
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Source: Debian 3.0r0 APT / Linux Dictionary V 0.16
http://www.tldp.org/LDP/Linux-Dictionary/html/index.html
Author: Binh Nguyen linuxfilesystem(at)yahoo(dot)com(dot)au
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