1.12. Additional Resources

This section includes various resources that can be used to learn more about the philosophy of system administration and the Red Hat Linux-specific subject matter discussed in this chapter.

1.12.1. Installed Documentation

The following resources are installed in the course of a typical Red Hat Linux installation, and can help you learn more about the subject matter discussed in this chapter.


Red Hat Linux uses the man command to display online help text. The text to be displayed is known as a man page, and is displayed using the following command:

man <man-page>

(Replace <man-page> with the name of the desired man page.)

Often you will see a man page followed by a number or letter within parentheses; this number or letter denotes the section under which the man page is filed. The sections include:

  • Section 1 — User commands

  • Section 2 — System calls

  • Section 3 — Subroutines

  • Section 4 — Devices

  • Section 5 — File formats

  • Section 6 — Games

  • Section 7 — Miscellaneous

  • Section 8 — System administration

  • Section l — Local

  • Section n — New

It should be noted that many of the man pages have gotten their section classifications in years past, sometimes making the sections more of a historical curiosity than a factual classification system.

However, there is one instance when the section number is important: when more than one man page exists with the same name. One example is chroot(1) and chroot(2). The first man page documents the chroot user command, while the second documents the chroot system call. If you enter the command man chroot, you will see the man page for the chroot user command[1]. In order to view the man page for the chroot system call, you must include the section number:

man 2 chroot

Once you are displaying a man page, you are actually using a text display program known as a pager. To display subsequent screens, press the [Space] key; to quit, press [Q]. The [H] key will display help for the pager.

1.12.2. Useful Websites

1.12.3. Related Books

Most books on system administration do little to cover the philosophy behind the job. However, the following books do have sections that give a bit more depth to the issues that were discussed here:



There is a set order which man uses to search the sections; by default it is configured to look first for user commands, then system administration-related information, and then at the rest of the sections in normal order.