UNIX Types/Styles:

• xBSD
  
• Linux (SYSV)
  

General UNIX:

• bash Shell
  
• Introduction
  
• Password Reset
  
• Windows Integration
  
• X Windows Server
  
• System Commands
  
• System Exit Codes
  
• Configuration Files
  
• SVGATextMode
  
• CDR/CDRW Writing
  
• MD5 Checksums
  
• Fork Bomb Protection
  
• setuid/setgid
  

Applications

• man
  
• cvs
  
• xargs
  
• hdparm
  

Services:

• cron
  
• DHCP
  
• CUPS
  
• syslogd
  
• Samba
  
• TFTPd
  
• Portsentry
  
• Secure SHell
  
• Sendmail
  
• NFS Configuration
  
• mgetty (ppp/fax)
  
• BIND (DNS)
  
• Apache Web Server
  

Unorganized:

• Scripts
  
• Internal Notes 1
  
• Internal Notes 2
  
• Internal Notes 3
  
• Internal Notes 4
  
• System Backup
  

Links:

• LinuxQuestions.org Man Pages Online
  
• The Linux Documentation Project Works
  

Background: I have an old computer running linux. Linux is a variant of the Unix OS family. It is among the SYSTEM V variants developed at AT&T's Bell Labs in 1969, the others being the BSD variants which derived from the U of C @ Berkeley. Berkeley got the source code from Bell Labs and made some changes to its structure. I was initially challenged by these Unix type OSs when I (as a student) began logging on to the University of Alabama's SUN Microsystems server (bama.ua.edu) running SunOS and later Solaris. All students requesting an account on this machine are given user accounts. Once I became comfortable with user commands and processes, I became more interested in administration. I couldn't afford a SUN computer like the Universities use but I could use linux which runs on PC computers. I then became proficient with linux as well. I tried the BSD variant known as FreeBSD. I liked it but didn't want to learn how to use their advanced ipfilter so I went back to linux (ipchains). After getting a broadband (high-speed) connection, I wanted to put my linux box on the internet just as bama.ua.edu and have it serve email, web pages, etc... Most web pages and internet services you access from your ISPs are coming from Unix boxes, not Microsoft stuff... At this time, I have to spend all my research time studying for Windows 2000's MCSE. I never check for newly discovered security holes in linux distributions. My computer was compromised by someone exploiting a 'known' problem with my version.