Mise à jour de la base de données, veuillez patienter...

Pas bête !

How to test a TCP (or UDP) remote port without telnet or netcat (in a one-liner):

(google’s IP and TCP to 443)

timeout 1 bash -c '</dev/tcp/216.58.207.46/443 && echo Port is open || echo Port is closed' || echo Connection timeout

#shellmagic
— Permalink