Voici le résultat :
bernard@bernard-Inspiron-3581:~/Bureau$ ping -c5 google.com
PING google.com (172.217.18.206) 56(84) bytes of data.
64 bytes from par10s38-in-f14.1e100.net (172.217.18.206): icmp_seq=1 ttl=116 time=5.47 ms
64 bytes from par10s38-in-f14.1e100.net (172.217.18.206): icmp_seq=2 ttl=116 time=8.03 ms
64 bytes from par10s38-in-f14.1e100.net (172.217.18.206): icmp_seq=3 ttl=116 time=9.85 ms
64 bytes from par10s38-in-f14.1e100.net (172.217.18.206): icmp_seq=4 ttl=116 time=8.38 ms
64 bytes from par10s38-in-f14.1e100.net (172.217.18.206): icmp_seq=5 ttl=116 time=9.61 ms
--- google.com ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 4007ms
rtt min/avg/max/mdev = 5.467/8.266/9.847/1.562 ms
bernard@bernard-Inspiron-3581:~/Bureau$
Cela dit, il semble qu'il ne c'est agi que d'un bref incident puisqu'à l'instant la commande
sudo apt update a fonctionné normalement. Merci de votre aide.
