• Security Issues
• Social Engineering
• Types of Attacks
• Detecting Attacks (IDS)
• Server Maintenance Issues

• Know where your major weaknesses for security exist.
• Know how to increase your security by training users
• Know the common ways systems are attacked
• Understand what IDS (intrusion detection systems) do, what their limitations are as well.
• Configure tripwire, install/use snort, portsentry.
• Run Chkrootkit, know what it is used for as well.

Commands:

• Why would you consider the "update agent" in Redhat to be a security program?
• What is a DOS? DDOS? Buffer overflow attack?
• What is a trojan horse?
• What is a root kit?
• What is a script kiddie? What is a hacker/cracker? What was the original definition of hacker?
• What is social engineering? How do you prevent it?
• What servers/services are the most vulnerable?
• Why use ssh, sftp instead of ftp, telnet?
• Why is imapd and popd a possible problem?
• If you use a wireless connection, what do you have to be careful of?

• Install and configure tripwire
• Chkrootkit
• Snort
  Instructions to Install Snort
• Nagios (formerly Netsaint)
• Portsentry (bottom of page)

• Linux Security
• Cert (computer emergency response team
• Google Newsgroups and check out comp.os.linux.security