pwd

Writes full pathname of current working directory

cd

Changes current directory to another one

ls

Lists out names and relevant information about files in a directory

find

Searches for files throughout the directory tree based on certain commands

sudo

Run commands as the SuperUser

su

Switch to another user or run commands as another user

mkdir

Creates a new directory

rmdir

Deletes a directory

touch

Creates new empty file in the current directory

vi

Text editor built into UNIX

mv

Move a file to another directory

cp

Copies the content in a file to another new file

cat

Concatenate files into a new file

cut

Remove sections of each line of a file

paste

join files horizontally

head

Prints the first few lines of a file out to standard input

tail

Prints the last few lines of a file

wc

Counts lines, words, and characters in a file

tar

Rip collection of files and directories into a compressed archive

gzip

Compress and archive files, similar to windows zip

cal

Displays the calendar in standard output with extra information

man

Manual pages, verbose descriptions of UNIX commands and how to use them

date

display current date and time

logout

logout from current user session

exit

causes shell to exit and close

echo

display line of text