List of Listings

Chapter 3: Welcome to Linux!

Listing 3.1: An example of the lilo.conf configuration file

Listing 3.2: The inittab configuration file

Listing 3.3: The contents of the /etc/ securetty file

Listing 3.4: Information about the network configuration and state

Chapter 4: Access Control

Listing 4.1: The contents of the /etc/login.defs file

Listing 4.2: The contents of the /etc/ sudoers configuration file

Listing 4.3: The sudo program information

Chapter 5: Administration

Listing 5.1: The sshd configuration file

Listing 5.2: The contents of the /etc/ssh/ssh_config configuration file

Listing 5.3: The /etc/xinetd.conf configuration file

Listing 5.4: The Telnet service configuration file

Chapter 6: Samba Style

Listing 6.1: A fragment of the smb.conf configuration file

Chapter 8: Electronic Mail

Listing 8.1: A fragment of the /etc/mail/sendmail.mc file

Listing 8.2: The /etc/mail/access file

Chapter 9: Gateway to Internet

Listing 9.1: Default ACL rules in the /etc/squid/squid.conf configuration file

Listing 9.2: Perl redirector program

Listing 9.3: JavaScript for killing popup windows

Listing 9.4: Limiting speed for loading media during work hours

Chapter 10: File Transfer

Listing 10.1: An example of an FTP command exchange

Listing 10.2: The contents of the ftpaccess configuration file

Listing 10.3: The contents of the /etc/ftpusers file

Chapter 11: Network Addressing

Listing 11.1: An example of the contents of the /etc/named.conf file

Chapter 12: System Monitoring

Listing 12.1: Listing produced by the lastlog command

Listing 12.2: The contents of the syslog.conf file

Listing 12.3: The contents of the /etc/rc.d/init.d/syslog file

Listing 12.4: The configuration file of the Logrotate utility (/etc/logrotate.conf)

Chapter 13: Backing Up and Restoring Data

Listing 13.1: An example of listing archive contents

Chapter 14: Advice from a Hacker

Listing 14.1: The contents of the /etc/sysctl.conf configuration file

Listing 14.2: The contents of the /etc/auto.misc file