My Most Frequently Used Linux Commands

Finding a file containing a string in a given folder

grep -r 'search string' *

1	grep -r 'search string' *

Searching the output of a given command for a string

ps aux | grep 'apache2'

1	ps aux \| grep 'apache2'

Scrolling through the output of a command

ps aux | less

1	ps aux \| less

Opening a file as read-only in VIM

vim -R "file name"

1	vim -R "file name"

Print the current working directory

pwd

pwd

Switching to root using sudo

sudo su -

sudo su -

Install a package

apt-get install "package-name"

1	apt-get install "package-name"

Getting the contents of a file

cat "file name"

1	cat "file name"

Getting the first 100 lines of a file

head -n 100 "file name"

1	head -n 100 "file name"

Getting the last 100 lines of a file

tail -n 100 "file name"

1	tail -n 100 "file name"

Finding a given file using the current directory as a starting point

find . -name "file name"

1	find . -name "file name"

List all the files in a directory, human readable, and sort by modified time

ls -halt

ls -halt

List the files with a given extension

ls *.php

ls *.php