Firewall manuscript

http://home.nuug.no/~peter/pf/

LaTex intro

http://www.andy-roberts.net/misc/latex/index.html

Local WP upgrade

http://www.cyberciti.biz/tips/howto-upgrade-wordpress-from-linux-unix-shell-prompt.html

Custom kernels

http://www.howtoforge.com/kernel_compilation_mandriva

Poor man’s data recovery

http://www.debianadmin.com/recover-data-from-a-dead-hard-drive-using-ddrescue.html