[SOLVED / RESOLU] Erreur à la mise à jour du serveur

bonjour @ljf

résultats des ping

admin@****:~$ ping 9.9.9.9
PING 9.9.9.9 (9.9.9.9) 56(84) bytes of data.
64 bytes from 9.9.9.9: icmp_seq=1 ttl=56 time=41.8 ms
64 bytes from 9.9.9.9: icmp_seq=2 ttl=56 time=41.8 ms
64 bytes from 9.9.9.9: icmp_seq=3 ttl=56 time=42.4 ms
64 bytes from 9.9.9.9: icmp_seq=4 ttl=56 time=41.9 ms
64 bytes from 9.9.9.9: icmp_seq=5 ttl=56 time=43.2 ms
64 bytes from 9.9.9.9: icmp_seq=6 ttl=56 time=43.2 ms
64 bytes from 9.9.9.9: icmp_seq=7 ttl=56 time=57.1 ms
64 bytes from 9.9.9.9: icmp_seq=8 ttl=56 time=42.2 ms
64 bytes from 9.9.9.9: icmp_seq=9 ttl=56 time=42.5 ms
64 bytes from 9.9.9.9: icmp_seq=10 ttl=56 time=42.3 ms
64 bytes from 9.9.9.9: icmp_seq=11 ttl=56 time=42.3 ms
64 bytes from 9.9.9.9: icmp_seq=12 ttl=56 time=42.6 ms
64 bytes from 9.9.9.9: icmp_seq=13 ttl=56 time=42.0 ms
64 bytes from 9.9.9.9: icmp_seq=14 ttl=56 time=42.5 ms
64 bytes from 9.9.9.9: icmp_seq=15 ttl=56 time=42.5 ms
^C
--- 9.9.9.9 ping statistics ---
15 packets transmitted, 15 received, 0% packet loss, time 61ms
rtt min/avg/max/mdev = 41.799/43.339/57.066/3.696 ms

et

admin@****:~$ ping wikipedia.org
ping: wikipedia.org: Temporary failure in name resolution

Diagnostic (j’ai une erreur si je clique sur Partager les logs avec YunoPaste ) indique : Le serveur ne dispose pas d’une adresse IPv4.