Basic Linux Commands Cheat Sheet

Command	Options	Explanation
`echo`	`echo "This text will be displayed."`	displays whatever's inside " "
`cat`	`cat [file]`	displays contents of a file or multiple files
`cd`		change directory
`ls`	~	list contents
	`-a`
	`-l`
	~
~		current user's home directory
..		up one directory

< Command >	< Syntax >	< What It Displays >
`cat`	`cat [file]`	displays contents of a file or multiple files

_{Volumes/Volume Groups}
< Command >	< Options >	< What It Displays >
`pvscan`	- - - - - -	list of physical volumes & associated volume groups
`lvscan`
`vgscan`
`pvs` / `vgs` / `lvs`
`pvdisplay` / `lvdisplay`
`vgdisplay`

_{File System Information}
< Command >	< Options >	< What It Displays >
`mount`

_{Hardware/System Information}
< Command >	< Options >	< What It Displays >

`lsusb`	`lsusb [opt]`	info on all connected USB devices
	`-v`	verbose
	`-s [bus name]`	info for a specific USB
	`-t`	shows device hierarchy as a tree

_{Packages/Device Driver Information}
< Command >	< Options >	< What It Displays >
`dpkg-query`	`dpkg-query [opt] [file or pkg]`	installation status, version, dependencies, & description
	`-L [pkg name]`	files installed by the package
	`-S [file]`	which package installed the file
`apt-cache stats`	- - - - - -	statistics from the `apt` package cache
`rpm`	`-qa`	list of all installed packages
	`-q [pkg name]`	whether a specific package is installed
	`-ql [pkg name]`	files installed by the package
	`-qf`	which package installed the file
`yum info [pkg name]`	-or- `rpm -qi [pkg name]`	general info about the package

Command	Searches For:	Reports:
`whereis`	anywhere the pattern is found (files AND commands)	location of the binary, the source, & the documentation
`which`	location of shell command	location of the binary & if an alias is being used
`locate`	faster/easier method Note: May not be current! (use `updatedb` cmd)
`find`
`grep`	searches within a file
`type`	commands (?)	aliases, functions, & commands built-in to the shell

Command	Syntax/Options	Explanation
`head`	`head [options] [value]`	displays first line(s)
	`-n`	specify # of lines to display
`tail`	`tail [opt] [value]`	displays last line(s)
	`-n`	specify # of lines to display
`sort`	~	sorts output (alphabetically by default)
	`-r`	reverse order
	`-k`	by key (can do multiple at once)
	`-k6 -M`	sort 6th column by month
	`-k7n`	sort 7th column numerically
`tr`	`tr [opt] [from X] [to Y]`	translates (changes) output from another command (must be used w/ pipe)
`wc`	`wc [opt] [file]`	prints the number of lines, words, & bytes
	`-l`	prints only number of lines
	`-w`	prints only word count
	`-c`	prints only byte count
	`-m`	prints character count
	`-L`	prints length of longest line
`tee`	`[command] \| tee [file]`	displays & writes to file simultaneously

Basic Linux Commands Cheat Sheet (DRAFT) by Tamaranth