Additional Resources; Installed Documentation; Useful Websites - Red Hat ENTERPRISE LINUX 4 - INTRODUCTION TO SYSTEM ADMINISTRATION Administration Manual

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6.4. Additional Resources

This section includes various resources that can be used to learn more about account and resource
management, and the Red Hat Enterprise Linux-specific subject matter discussed in this chapter.

6.4.1. Installed Documentation

The following resources are installed in the course of a typical Red Hat Enterprise Linux installation
and can help you learn more about the subject matter discussed in this chapter.
User Manager Help menu entry — Learn how to manage user accounts and groups.
•
man page — Learn more about the file format information for the
•
passwd(5)
man page — Learn more about the file format information for the
• group(5)
man page — Learn more about the file format information for the
• shadow(5)
man page — Learn how to create or update user accounts.
• useradd(8)
man page — Learn how to delete user accounts.
• userdel(8)
man page — Learn how to modify user accounts.
•
usermod(8)
man page — Learn how to update a user's password.
• passwd(1)
man page — Learn how to update many users' passwords at one time.
• chpasswd(8)
man page — Learn how to change user password aging information.
• chage(1)
man page — Learn how to change a user's GECOS (
• chfn(1)
man page — Learn how to change a user's login shell.
•
chsh(1)
man page — Learn how to create a new group.
• groupadd(8)
man page — Learn how to delete a group.
• groupdel(8)
man page — Learn how to modify a group.
• groupmod(8)
man page — Learn how to administer the
• gpasswd(1)
man page — Learn how to verify the integrity of the
• grpck(1)
files.
man page — Learn how to change group-level ownership.
•
chgrp(1)
man page — Learn how to change file access permissions.
• chmod(1)
man page — Learn how to change file owner and group.
• chown(1)

6.4.2. Useful Websites

http://www.bergen.org/ATC/Course/InfoTech/passwords.html — A good example of a document
•
conveying information about password security to an organization's users.
http://www.crypticide.org/users/alecm/ — Homepage of the author of one of the most popular
•
password-cracking programs (Crack). You can download Crack from this page and see how many
of your users have weak passwords.
http://www.linuxpowered.com/html/editorials/file.html — a good overview of Linux file permis-
•
sions.
Chapter 6. Managing User Accounts and Resource Access
/etc/group
/etc/passwd
/etc/group
/etc/shadow
) information.
finger
and
/etc/gshadow
and
/etc/group /etc/gshadow
file.
file.
file.
files.