Debian/Ubuntu

Articles

• Ubuntu as a server∞ - This is a detailed description about the steps to be taken to setup a Ubuntu based server (Ubuntu 5.10 - Breezy Badger) that offers all services needed by ISPs and hosters (web server (SSL-capable), mail server (with SMTP-AUTH and TLS!), DNS server, FTP server, MySQL server, POP3/POP3s/IMAP/IMAPs, Quota, Firewall, etc.).
• Software Raid-1∞
• Exim on Debian∞
• clamav and spamassassin∞ - For gentoo, but not very distro specific.
• DVD Ripping∞ - LIfehacker∞ article on DVD ripping
  • Mediaubuntu∞ - Repository for libdvdcss2
  • DVDRippingUbuntu

APT

• Debian Package Mirror List∞
• APT HOWTO∞

VPN

• Dont forget to set /proc/sys/net/ipv4/ip_forward to 1. Ubuntu doesn't set it by default.

Processes

• Detaching a process
  [ctrl]+z to pause a parocess
  bg to cause it to resume in the background
  fg to bring it back to the foreground.
  disown -a -h detach it from the terminal all together.
  jobs see a list of background jobs.
  
• Start a process in the backgorund
  nohup

ISOs

• mount an ISO:

mount file.iso /cdrom -t iso9660 -o loop

Recursive find and replace

find ./ -type f -exec sed -i 's/ReplaceThis/WithThis/' {} \;

Hardening