100+ Linux Commands Cheat Sheet

ls

ls -l

ls -t

pwd

cd directory

cd ..

cd /

clear

history

touch filename

vi filename

cat filename

hostnamectl

ifconfig

date

top

free -m

head filename

tail filename

mv file /new/file/path

mv filename new_filename

cp filename new_filename

man command_name

rm filename

rm“rf directory_name

sudo

mkdir directory_name

kill pid

reboot

shutdown“h now

dig domain_name

dig -x host

host domain_name

whois domain_name

ping ip

ssh username@ip

wget file

wget -c file

traceroute domain_name

telnet domain_name port

netstat“pnltu

route

arp

cat /etc/resolv.conf

tcpdump -i eth1 'port 80'

nmap ip

locate keyword

find keyword

find /home -name *.ext

find / -type f ! -perm xxx

find / -perm /u=r

grep keyword filename

grep keyword *

grep -i keyword *

grep -r keyword *

grep -x 'what to match' *

grep -c keyword *

chmod xxx filename

chmod“R xxx directory

chmod“x filename

chown username filename

chown username:groupname filename

chown username:groupname filename1 filename2 filename3

chown --from=bob alice filename

chown -h usergroup symbolic_link

df“h

mount
unmount

du -h /home/directory_name

du -sh /home/directory_name

du -ah --exclude='*.xxx' /home/directory_name

du -ha --time /home/directory_name

fdisk -­l

sudo du -x / | sort -nr | head -20

adduser username

userdel -r 'username'

passwd -l 'username'

whoami

usermod -c 'This user will be deleted tomorrow' username

cat /etc/passwd

usermod -d /home/test username

sudo deluser username group_name

usermod -a -G group_name username

groupadd group_name

groupdel group_name

id

tar -cvf archive.tar filename.txt

tar -tvf archive.tar

tar -xvf archive.tar filename.txt

zip archive.zip file1.txt file2.html file3.jpg

zip -u archive.zip filename.txt

zip -d archive.zip filename.txt

unzip archive.zip

unzip archive.zip -d /directory_name

tar xf archive

gzip filename

gzip -c filename > archive.gz

ps“ef | grep process_name

netstat“pnltu | grep port

history | grep keyword

ip r

ssh-keygen

scp filename user@ip:/home/location

find / -type f -perm 777 -print -exec chmod xxx {} \;

sed -i 's/CONTENT_TO_REPLACE/CONTENT_TO_REPLACE_IT_WITH/g' filename

tcpdump -nnvvS src SRC_IP and dst port xxxx

traceroute domain_name -q 5