Important Linux Commands - Novell LINUX ENTERPRISE SERVER 10 - INSTALLATION AND ADMINISTRATION 08-05-2008 Installation Manual

chgrp changes the group ownership of the file. However, the owner of the file
must be a member of the new group. In this way, the user tux from
"Sample Output Showing File Permissions"
the file ProjectData to project4 with the command chgrp project4
ProjectData, as long as he is a member of this new group.

18.3 Important Linux Commands

This section gives insight into the most important commands. There are many more
commands than listed in this chapter. Along with the individual commands, parameters
are listed and, where appropriate, a typical sample application is introduced. To learn
more about the various commands, use the manual pages, accessed with man followed
by the name of the command, for example, man ls.
In the man pages, move up and down with PgUp and PgDn . Move between the beginning
and the end of a document with Home and End . End this viewing mode by pressing Q .
Learn more about the man command itself with man man.
In the following overview, the individual command elements are written in different
typefaces. The actual command and its mandatory options are always printed as
command option. Specifications or parameters that are not required are placed in
[square brackets].
Adjust the settings to your needs. It makes no sense to write ls file if no file named
file actually exists. You can usually combine several parameters, for example, by
writing ls -la instead of ls -l -a.
18.3.1 File Commands
The following section lists the most important commands for file management. It covers
anything from general file administration to manipulation of file system ACLs.
File Administration
ls [options] [files]
If you run ls without any additional parameters, the program lists the contents of
the current directory in short form.
(page 360) can switch the group owning
Working with the Shell
Example 18.1,
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