ls — List directory contents.
echo — Prints text to the terminal window.
touch — Creates a file.
mkdir — Create a directory.
grep — search.
man — Print manual or get help for a command.
pwd — Print working directory.
cd — Change directory
mv — Move or rename directory
rmdir — Remove directory
locate — Locate a specific file or directory
less — view the contents of a text file
| — Pipe
head — Read the start of a file
tail — Read the end of a file
exit — Exit out of a directory