UNIX

Unix Commands Reference Card
http://www.indiana.edu/~uitspubs/b017/
http://amath.colorado.edu/computing/unix/cheatsheet/A.pdf
http://www.mae.carleton.ca/maepdfs/unix-commands.pdf
http://www.ssc.upenn.edu/HELP/unix/Commands.Help
http://www.rice.edu/it/pdf/training/unix/unix01.01.pdf
http://www.csd.uoc.gr/~hy255/refcards/unix-command-summary.pdf

Unix / Linux commands
http://simplythebest.net/info/unix/unix_commands.html

UNIX Shell Script Tutorials & Reference
http://www.injunea.demon.co.uk/pages/page205.htm

Unix Error Messages
http://www.gnu.org/fun/jokes/unix.errors.html

Unix Primer - Basic Commands In the Unix Shell
http://www.ks.uiuc.edu/Training/Tutorials/Reference/unixprimer.html

Quick Reference: Unix Commands
http://www.washington.edu/computing/unix/unixqr.html

UNIX Commands Guide
http://www.cs.brown.edu/courses/bridge/1998/res/UnixGuide.html

UNIX shell commands
http://unixhelp.ed.ac.uk/vi/unix.html

Reference Unix Guide
http://www.webmonkey.com/webmonkey/reference/unix_guide/

Some examples of using UNIX find command
http://www.athabascau.ca/html/depts/compserv/webunit/HOWTO/find.htm

Internals of Familiar Unix Commands
http://perl.plover.com/yak/commands/

The 15 Essential UNIX commands
http://www.petefreitag.com/item/426.cfm

Five Timesaving Unix Commands for Oracle DBAs
http://www.oreillynet.com/pub/a/oreilly/oracle/news/unix_oracle_0101.html

A Course In UNIX Operating System
http://www.comp.lancs.ac.uk/computing/users/eiamjw/unix/index.html

Learn UNIX in 10 minutes
http://freeengineer.org/learnUNIXin10minutes.html

List of Unix programs (From Wikipedia)
http://en.wikipedia.org/wiki/List_of_Unix_programs

DOS to UNIX Translation
http://unixhelp.ed.ac.uk/DOStoUNIX.html

Frequently Used Unix Commands
http://www.itd.umich.edu/itcsdocs/r1159/

Introduction to Unix
http://8help.osu.edu/wks/unix_course/index.html

UNIX Tutorial for Beginners
http://www.ee.surrey.ac.uk/Teaching/Unix/

Basic Unix Commands
http://mally.stanford.edu/~sr/computing/basic-unix.html
http://www.math.utah.edu/computing/unix/unix-tutorial.html
http://www.math.utah.edu/computing/unix/unix-commands.html
http://www.westwind.com/reference/OS-X/commandline/
http://www.utexas.edu/cc/docs/ccug1/commandsum.html
http://www.cam.ac.uk/cs/docs/leaflets/u5/
http://www.cs.rutgers.edu/LCSR-Computing/commands.html
http://www.math.harvard.edu/computing/unix/unixcommands.html
http://www.soi.wide.ad.jp/soi-asia/ow/2005-summer/ow2005-pre-workshop-assignment.doc
http://www.itd.umich.edu/itcsdocs/r1159/r1159.pdf
http://www.cse.yorku.ca/~orner/1020/handout.pdf