[Discover] TCP/IP Configuration Commands for UNIX/Linux, MacOS X, Windows, and Cisco IOS http://www.cromwell-intl.com/tcpip/commands.html (network osx tcp/ip unix)
 [Discover] Re: Remote X-Display Problems http://www.redhat.com/archives/fedora-list/2003-November/msg04088.html (unix ubuntu)
 [Discover] Unison File Synchronizer http://www.cis.upenn.edu/~bcpierce/unison/index.html (backup windows opensource linux)
 [Discover] ImageMagick: Install from Source http://www.imagemagick.org/script/install-source.php#unix (unix install imagemagick image)
 [Discover] How to debug a Shell Script under Linux or UNIX http://www.cyberciti.biz/tips/debugging-shell-script.html (unix)
 [Discover] AIX commands you should not leave home without http://www.ibm.com/developerworks/aix/library/au-aix_cmds/?S_TACT=105AGY06& (tutorial unix aix)
 [Discover] IBM Linux のヒント: cron と at を使ったジョブ・スケジューリング - Japan http://www-06.ibm.com/jp/developerworks/linux/library/l-job-scheduling.shtml?ca=drs- (unix linux command server)
 [Discover] Linux commands you've never used http://bashcurescancer.com/10-linux-commands-youve-never-used.html (bash shell linux reference)
 [Discover] Setting up SSH public/private keys http://www.ece.uci.edu/~chou/ssh-key.html (ssh sysadmin unix)
 [Discover] Unix Crontab - setting up cron jobs using crontab http://www.adminschoice.com/docs/crontab.htm (crontab linux unix sysadmin)
 [Discover] The Unix Command Line: Files & Folders http://www.westwind.com/reference/OS-X/commandline/files-folders.html (files of owenership folder)