lsof -i

sync && echo 3 > /proc/sys/vm/drop_caches

df -h

du -hd 2 [folder]

sudo journalctl -f # <- "follow" (realtime)

sudo journalctl -f _COMM=smtpd

journalctl --vacuum-time=1h

sudo find / -nogroup -nouser

WINEARCH=win32 wine wineboot && winetricks dotnet462

wine program.exe

pacman -Syu --ignore=miniupnpc --ignore=nodejs --ignore=npm

sudo pacman -Rns $(pacman -Qtdq) # apt-get autoremove equivalent for arch

certbot certonly --manual -d '*.xif.fr'

iptables -A INPUT -s xxx.xxx.xxx.xxx -j DROP # ban ip (-D pour deban)