whoami 
ps aux 
uname
sudo apt update 
sudo apt upgrade
sudo apt install nginx
sudo systemctl start nginx
ps
grep 
ps aux | grep nginx
ps -a 
vim 
man 
cal 
date
ls 
mv 
cd 
cp 
rm 
touch 
clear 
echo 
cat
nano 
uname 
find 
grep (regex) 
head
tail 
cat 
less 
less | grep 
tail 
kill all
sudo 
top 
htop
uptime