Linux Command Line Cheat Sheet

Bash Commands

uname -a	Show system and kernel
head -n1 /etc/issue	Show distri­bution
mount	Show mounted filesy­stems
date	Show system date
uptime	Show uptime
whoami	Show your username
man command	Show manual for command

Directory option

pwd	Show current directory
mkdir dir	Make directory dir
cd dir	Change directory to dir
cd ..	Go up a directory
ls	List files

ls commands

-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
-1	One file per line
-m	Comma-­sep­arated output
-Q	Quoted output

Search Files

grep pattern files	Search for pattern in files
grep -i	Case insens­itive search
grep -r	Recursive search
grep -v	Inverted search
grep -o	Show matched part of file only
find /dir/ -name name*	Find files starting with name in dir
find /dir/ -user name	Find files owned by name in dir
find /dir/ -mmin num	Find files modifed less than num minutes ago in dir
whereis command	Find binary / source / manual for command
locate file	Find file (quick search of system index)

File operations

touch file1	Create file1
cat file1 file2	Concat­enate files and output
less file1	View and paginate file1
file file1	Get type of file1
cp file1 file2	Copy file1 to file2
mv file1 file2	Move file1 to file2
rm file1	Delete file1
head file1	Show first 10 lines of file1
tail file1	Show last 10 lines of file1
tail -f file1	Output last lines of file1 as it changes

Process management

ps	Show snapshot of processes
top	Show real time processes
kill pid	Kill process with id pid
pkill name	Kill process with name name
killall name	Kill all processes with names beginning name

File Permissions

chmod 775 file	Change mode of file to 775
chmod -R 600 folder	Recurs­ively chmod folder to 600
chown user­:g­roup file	Change file owner to user and group to group