chmod
- guide
- manual		The chmod utility is used to modify access permissions on files and directories on Unix / Linux systems.
sudo
- manual		Sudo allows a permitted user to execute a command as the superuser or another user, as specified in the sudoers file.
ls
- manual		Lists the contents of a directory.
awk
- guide
- manual		awk is a pattern scanning and processing language. Allows you to search and manipulate patterns within data.
grep
- guide
- manual		The grep utility allows a user to search through a file for a pattern, and returns customized information about where that pattern exists within the specified file.
cp
- manual		cp allows you to copy files and directories
rm
- manual		rm allows you to remove files or directories
mv
- manual		mv allows you to move OR RENAME files / directories.
mkdir
- manual		mkdir allows you to make a directory
cd
- manual		Change the current directory. Navigate the file system.
cat
- manual		cat allows you to conCATenate files and print on the standard output
rmdir
- manual		rmdir allows a user to remove a directory
pwd
- manual		displays the name of the Present Working Directory. aka: the directory you're in.
ln
- manual		Makes hard or symbolic links between files. (Similar to windows shortcuts and Mac aliases)
ps
- manual		Provides information about the systems current processes.
find
- guide
- manual		Search for files by name or attribute within a directory tree.
touch
- manual		Update the timestamp of a file or directory.
chown
- manual		chown allows you to change the owner / group of a file.
df
- manual		Provides information on disk usage. (Disk Free)
man
- manual		Displays the manual page for a given command.
tar
- manual		Create a single file from many, or reverse the process. Allows you to create archives.
kill
- manual		kill sends signals to processes or groups of processes. Often used to terminate processes.
chgrp
- manual		Changes group ownership of a file or directory.
date
- manual		Allows you to set or view the system's date and time.
echo
- manual		Generally used to echo text or variables to standard output (the screen). But can be used for much more!
less
- manual		more's younger (cooler?) brother. Another utility to view files.
sort
- manual		Allows a user to sort and merge lists.
du
- manual		This program reports file space usage.
sed
- manual		Stream EDitor. Allows the manipulation of input/output streams.
tail
- manual		Outputs the 'tail end' of a file. Customizable output.
dd
- manual		Allows the copy AND conversion of a file (byte-wise).
mount
- manual		Mounts a file system to the system's current directory tree.
wc
- manual		Print useful information about a file: Lines, words, bytes, etc..
gzip
- manual		Compress or expand files. Also see bzip2.
vi
- manual		'A Programmer's Editor'. See also: vim (VI iMproved)
umount
- manual		Opposite of mount. Unmount a filesystem.
su
- manual		Creates a new shell with a different user / group id. Often used to complete tasks as the superuser (root).
cut
- manual		Allows a user to remove logical sections from each line of a file.
uname
- manual		Get the name and additional information about the system's current kernel.
passwd
- manual		Represents the password file. Usually located in /etc/passwd
which
- manual		Shows the full path of available shell commands. Try it out! --> ' which ls '
diff
- manual		Helps determine differences among files.
head
- manual		Shows the first part of a file. Customizable, displays to screen. See also: tail.
file
- manual		Helps determine a file's filetype.
basename
- manual		returns the filename or directory part of a path.
who
- manual		Output the users currently logged in to the system.
sleep
- manual		Sleep (or pause) for a given number of milliseconds.
lpr
- manual		LinePRinter. Print Files. To a Printer. For Real.
sync
- manual		Schedule file system updates via sync
mknod
- manual		Make special files for devices.