Linux Cheat Sheet (DRAFT) by ice.92

uname -a

Show system and kernel

ifconfig -a	Displays all network ports and ip addresses
ethtool eth0	Displays eth0's ethernet status
whois domain	Get whois info for domain
dig domain	Get DNS info for domain
dig -x host	Reverse lookup host
host google.com	Lookup DNS IP
hostname -i	Lookup local IP address
netstat -tupl	List active connec­tions to/from system

C-z	Sleep program
C-a	Go to start of line
C-e	Go to end of line
C-u	Erases whole line
C-w	Erases one word in current line
C-k	Cut to end of line
C-r	Search history
!!	Repeat last command
!abc	Run last command starting with abc
!$	Last arguments of previous command
!*	All arguments of previous command

ncdu	Ncurses disk usage utility
glances	System monitor
nethogs	Bandwidth monitor

-a	Show all (including hidden)
-R	Recursive list
-r	Reverse order
-t	Sort by last modified
-S	Sort by file size
-l	Long listing format
-m	Comma-­sep­arated output

grep -i	Case insens­itive search
grep -r	Recursive search
grep -v	Inverted search
grep -o	Show matched part of file only
find /dir/ -name abc*	Find files starting with abc in dir
find /dir/ -user name	Find files owned by name in dir
find /dir/ --mmin num	Find files modifies less than num minutes ago in dir
find /dir -size +100k	Find files larger than 100k
locate file	Find file (quick search of system index)
whereis app	Show possible locations of app
which app	Show which app will be run by default

tar xf file.tar	Untar into current directory
	tar flags
c	create archive
t	Table of contents
x	Extract
f	Specifies filename
z	Use zip/gzip
j	bzip2 compre­ssion
k	Do not overwrite
T	Files from file
W	Ask for confir­mation
V	Verbose

chmod 777	rwx for everyone
chmod 755	rw for owner, rx for group/­world
chown user.group file	Change file owner to user and group to group