Linux Terminal Commands-1

Linux Terminal Commands-1

System Info commands:

Description	Shortcut key
Show the current date and time	date
Show this month's calendar	cal
Show current uptime	uptime
Display who is online	w
Who you are logged in as	whoami
Display information about user	finger user
Show kernel information	uname -a
CPU information	cat /proc/cpuinfo
Memory information	cat /proc/meminfo
Show disk usage	df -h
Show directory space usage	du
Show memory and swap usage	free

Searching commands:

Description	Shortcut key
Search for pattern in files	grep pattern files
Search recursively for pattern in dir	grep -r pattern dir
Search for pattern in the output of command	command | grep pattern
Find all instances of file	locate file
Starting with the root directory, look for the file called filename	find / -name filename
Starting with the root directory, look for the file containing the string filename	find / -name "*filename*"
Find a file called filename using the locate command; this assumes you have already used the command updatedb	locate filename
Create or update the database of files on all file systems attached to the Linux root directory	updatedb
Show the subdirectory containing the executable file	which filename
Starting with the directory called dir, look for and list all files containing TextStringToFind	grep TextStringToFind /dir