Unix commands as they'd be typed into a prompt, read the lessons for clarification or instructions. Anything in //'s is a description of what should be there rather than a real life example of what needs to be there. Everything after the ;; are comments on what it does.

• ls ;;list directories and files ls -a ;;list all, even normally hidden files starting with . ls -G ;;list with colors ls -l ;;list long version cd .. ;;change directory one directory back cd ~ ;;change directory to home directory cd public_html ;;change from home directory to public_html directory pwd ;;show current working directory mkdir exampledirectory ;;make directory named exampledirectory rm -d exampledirectory ;;remove directory named exampledirectory man man ;;read the manual page about manual pages apropos chmod ;;use the apropos command to find out about the chmod command ps -aux|grep /username/ ;;show processes (aka jobs) sorted to match a specific /username/ kill -9 /processidnumber/ ;;really terminate a process indicated by the number /processidnumber/ alias ls ls -GF ;;When added to the .cshrc file makes your ls command into an ls -GF command alias help man ;;When added to the .cshrc file makes help a synomyn for man source .cshrc ;;reload the .cshrc file, useful if you've made changes to it and want to see them help man ;;If the previous line is in your .cshrc file, then you'll read the manual page about manual pico ;;An easy to use text editor pine ;;An easy to use email reader date ;;Show the date motd ;;Show the message of the day less /filename/ ;;View /filename/ with the less viewer, a way to look at files more /filename/ ;;Same as less only can't scroll up and down with arrow keys etc, typing q quits both of them pico /filename/ ;;A basic text editor, easy to use cp /filenametocopy/ /filenametobecopiedto/ ;;copy command cp examplefile ~/public_html/examplefile.save ;;copy from current directory into the public_html directory rm examplefile ;;Remove file named examplefile chmod -R 755 /directoryname/;;Change permissons to publicly readable and executeable for /directoryname/ and its contents clear ;;Clears the screen who ;;Shows current users of the system finger /username/ ;;Shows finger information about /username/ as well as /username/'s .plan file finger /name/ ;;Shows finger infromation about /name/ finger kevin ;;Shows accounts with the name kevin in them w ;;Like who only different ping www.google.com ;;Shows if www.google.com is up, and any lag time between you and it, exit with a control-z lynx www.google.com ;;Lynx is a text based web browser which pico ;;Shows the path of directories to the pico program setenv EDITOR /pathofdirstopico/;;When added to .login file makes pico your default editor

  ssh chrisr@tentacle.net ;;Use the Secure Shell program to login the user chrisr to the host tentacle.net

  rlogin /user@hostname.com/ ;;Remote login, like ssh but unsecure

  telnet /user@hostname.com/ ;;Same as above head * ;;Shows the beginning of all files in your current working directory tail * ;;Shows the end of all files in your current working directory head *|less ;;Makes the output from the head program get viewed through less tty ;;Show which terminal type you're on write /username/ tty/xx/ ;;Write a message to /username/'s terminal of type /xx/ irc ;;Internet Relay Chat, a decent server is irc.dal.net

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Other stuff to know:

1. * is a wildcard character that allows it to be any file name or directory path, an example of usage would be cd pub* which would change your directory to the directory named public_html, or public_hair, or pubblah, or pubetc, you get the idea. less * will list everything in your directory with less. rm * will remove every file in your current directory, use with knowledge and caution.
2. Tab completion is when you hit tab to complete something you've partially typed, for example cd pub/youhittabratherthan*lic_html/ will cause unix to make cd pub into cd public_html assuming that you've typed enough to make it unique. cd p/hittab/ will do the same thing most likely, unless you've got another directory that starts with the letter p.
3. Pressing the up arrow key will scroll up through your history of commands, and the down arrow will scroll down through it.