BASH

BASH dir compression

create an archive file called foo.tar.gz in current directory
tar -zcvf foo.tar.gz /home/jerry/tom

to restore/extract all files from archive in current directory
tar -zxvf foo.tar.gz

Basic commands

clear screen: Ctrl + l
change to home dir: cd ~
change to previous dir: cd -
change directory and swap back again: pushd /some_dir, then popd
minimize program to the background (e.g. if working on file that's not ready to be saved): Ctrl + z
then send it back to the foreground again:fg
monitor system resources: htop

echo, cat, touch,
whoami, pwd, ls -la
mkdir, rmdir, rm, rm -rf
sudo, su, sudo -i
sudo apt update && sudo apt upgrade -y

echo $TERM
visudo

sudos

logout user: Ctrl + d

man
whatis
which
whereis

wget
curl

zip
unzip

head
tail
less

cmp
diff

tree -> tree.txt

sort

Pipe |

find
grep
sed
awk

chmod
chown

Networking

ifconfig
ip address | grep eth0
ping -c 5 -s 500 url
traceroute url

netstat -tulpn
ss -tulpn

sudo ufw allow 80
sudo ufw status

uname -a

sudo apt install neofetch
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```BASH
cal

echo “4+5” | bc

free

df -H

ps -aux
top
kill
pkill -p name
systemctl start

history
reboot
shutdown -h now

VS Code

new terminal: Ctrl + æ (Win) | Shift + Ctrl + ` (Mac)