August 2003
Intermediate to advanced
816 pages
28h 15m
English
book
Managing Linux® Systems with Webmin™ System Administration and Module Development
by Jamie Cameron
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4.1. Introduction to UNIX Users and Groups
On Linux and other UNIX operating systems, a user is a person who can login to the system via SSH, telnet, FTP or at the console. Users can also receive email and own files on the server's local filesystems. Each user has a login name, a password, and a home directory in which all its files are stored. Users also have several additional attributes, such as a real name, shell (the program that is run when the user logs in), and expiry date.
Each user is a member of at least one group, called a primary group. In addition, a user can be a member of an unlimited number of secondary groups. Group membership can be used to control the files that a user can read and edit. For example, if two users are working ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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