cal Provides a calendar.
cat Concatenate. Outputs a text file to the screen.
cd .Change directory
chmod ..Change modes/permissions on files.
cp .Makes copies of files
date ..Gives the current date and time
diff ...Finds the difference between two files.
echo .Echoes argument
file ...Determines and displays information on the file type
find ..Finds files
grep ..Search a file for a pattern
gzip ..Compresses/decompresses files. Usually used in combination with tar.
head .Displays the top part of a text file. Opposite of tail.
kill ...Terminates a process. Example: kill -9 2323
less ...Scrolls through a text file
ln ..Makes file links (similar to a Windows shortcut)
ls ..List contents of a directory
man ..Manual. Example: man find
mkdir ...Make a directory
more .Scrolls through a text file
mv Moves files.
passwd .Change the Unix login password
pico ..A simple text editor
ps .Process status report. Example: ps -ef
pwd ..Prints (gives the path) of the working directory
rm Remove (delete) a file
rm fr ...Forcefully remove (delete) a file or directory and all its contents
tail Displays the last part of a text file (opposite of head)
tar -cf .. .Groups multiple files into a single archive
tar xf ..Unpacks a tar archive into multiple files
top Displays information about the top CPU processes
uname ...Displays system information.
vi ..A text editor
wc Counts the words in a file
who ..Lists users who are logged in to the system
For more information on using any of the above commands, type man [command] at the Unix prompt