Using system documentation resources

Basic Commands and Simple Shell Scripts
98
man pages
The most common resource used to obtain documentation is manual pages, also referred to by the command used to invocate them man.
Almost any utility installed in the system has a man page to help you use it (in other words, specifying all the options for the tools and what they do. You can run man tar and check the output:
[root@rhel-instance
]# man tar
TAR(1) GNU TAR
Manual TAR(1)
NAME
tar - an archiving utility
SYNOPSIS
Traditional usage
tar {A|c|d|r|t|u|x}[GnSkUWOmpsMBiajJzZhPlRvwo] [ARG...]
UNIX-style usage
tar -A OPTIONS ARCHIVE ARCHIVE
tar -cf ARCHIVE OPTIONS [FILE...]
tar -d f ARCHIVE OPTIONS [FILE...]
You can see in it (navigate with the arrow keys, the space bar, or Page Up and Page Down) and exit it by hitting q (for quit).
There are sections within the man page on related topics. It is pretty simple to search those by using the apropos command. Let’s see this for tar:
[root@rhel-instance
]# apropos tar
dbus-run-session (1) - start a process as anew D-Bus session
dnf-needs-restarting (8) - DNF needs_restarting Plugin
dracut-pre-udev.service (8) - runs the dracut hooks before
udevd is started
gpgtar (1) - Encrypt or sign files into an archive
gtar (1) - an archiving utility
open (1) - start a program on anew virtual
terminal (VT).

Download 1.85 Mb.

Share with your friends: