我是个菜鸟，所以请提供相应的答案，我正在使用一台迷你电脑作为带有 remote.it 的 jellyfin 服务器，它运行良好，直到我尝试安装 nextcloud，当我外出旅行时，我的服务器停止响应 sudo apt update 并给出名称解析问题，我尝试了互联网上的所有方法来解决这个问题。resolv.conf 文件如下所示
# Generated by dhcpcd from enp2s0.dhcp, enp2s0.dhcp6, enp2s0.ra
nameserver 8.8.8.8
nameserver 8.8.4.4
nameserver 8.8.8.8
nameserver 8.8.4.4
nameserver fd75:beba:8d64::1
# /etc/resolv.conf.tail can replace this line
sudo apt update
Err:1 https://repo.jellyfin.org/ubuntu groovy InRelease
Temporary failure resolving 'repo.jellyfin.org'
Err:2 http://ppa.launchpad.net/qbittorrent-team/qbittorrent-stable/ubuntu groovy InRelease
Temporary failure resolving 'ppa.launchpad.net'
Err:3 http://archive.ubuntu.com/ubuntu groovy InRelease
Temporary failure resolving 'archive.ubuntu.com'
Reading package lists... Done
Building dependency tree
Reading state information... Done
All packages are up to date.
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/groovy/InRelease Temporary failure resolving 'archive.ubuntu.com'
W: Failed to fetch https://repo.jellyfin.org/ubuntu/dists/groovy/InRelease Temporary failure resolving 'repo.jellyfin.org'
W: Failed to fetch http://ppa.launchpad.net/qbittorrent-team/qbittorrent-stable/ubuntu/dists/groovy/InRelease Temporary failure resolving 'ppa.launchpad.net'
W: Some index files failed to download. They have been ignored, or old ones used instead.
ping 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_seq=1 ttl=119 time=2.62 ms
64 bytes from 8.8.8.8: icmp_seq=2 ttl=119 time=2.23 ms
64 bytes from 8.8.8.8: icmp_seq=3 ttl=119 time=2.33 ms
64 bytes from 8.8.8.8: icmp_seq=4 ttl=119 time=2.16 ms
^C
--- 8.8.8.8 ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3005ms
rtt min/avg/max/mdev = 2.158/2.332/2.620/0.176 ms
ping -c4 google.com
ping: google.com: Name or service not known
我没有 vnc 或远程桌面服务，因此使用终端的解决方案将不胜感激。