This Is Your Brain On Informatics: Linux Commands

General Linux Command Info

• Almost every single command should have an argument (an input for a function)
• A filename in Linux refers to both a file's name and a directory's name

Common Linux Commands

Command	Syntax	Description
cat	cat filename	Display file’s contents to the standard output device (usually your monitor)
cd	cd /pathname	Change to the given directory
chmod*	chmod options mode filename	Changes a file's permissions.
chown*	chown private_owner:group_owner filename	Changes ownership of the file
clear	clear	Clears the screen by scrolling (does not delete anything)
cp	cp options source destination	Copies a file from the source to the destination
find	find /pathname string	Starts at the indicated directory and searches for the string in a filename
grep	grep options pattern filename	Searches for the pattern in the file
ll	ll /pathname	List Long: lists the details of the entire directory or file indicated
ln	ln options source destination	Link: creates a shortcut. Use -s for the options to create a soft link (more capabilities)
ls	ls /pathname	Lists the files and directories in a given directory
man	man command	Opens the manual page for the given command
mkdir	mkdir options filename	Makes a directory at the given location with the given name
mv	mv options source destination	Moves a file or directory from the source to the destination
pwd	pwd	Displays the pathname for the current directory
rm	rm options filename	Removes the given file. If -rf is used for the options, a directory and its roots will be removed as well
ssh	ssh options user@machine	Remotely logs into the given machine with the given user name
sudo	sudo command	Allows super user privileges for the given command (requires root password). sudo su allows login to root
tar	tar -xzvf	Extracts files with the extension *.tar.gz or *.tgz
touch	touch filename	Creates an empty file with given name