I updated my kernel this weekend, and now I'm using 5.3.1.
christopher@HAL4:~$ uname -r 5.3.1-050301-generic
I need to login to servers, but I cannot do so by hostname any longer. For example, I have a server, "web4," and it's local IP is 192.168.64.140. If I run dig:
christopher@HAL4:~$ dig web4 ; <<>> DiG 9.11.3-1ubuntu1.9-Ubuntu <<>> web4 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1580 ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 1280 ;; QUESTION SECTION: ;web4. IN A ;; ANSWER SECTION: web4. 0 IN A 192.168.64.140 ;; Query time: 0 msec ;; SERVER: 192.168.3.222#53(192.168.3.222) <---- Correct! ;; WHEN: Mon Sep 30 09:50:31 CDT 2019 ;; MSG SIZE rcvd: 49
Same thing for nslookup:
christopher@HAL4:~$ nslookup web4 Server: 192.168.3.222 Address: 192.168.3.222#53 Name: web4 Address: 192.168.64.140
However, neither ping or ssh work ('login' is a bash script that uses my key):
christopher@HAL4:~$ ping web4 ping: web4: Name or service not known christopher@HAL4:~$ login web4 ssh: Could not resolve hostname web4: Name or service not known
My /etc/resolv.conf is:
# This file is managed by man:systemd-resolved(8). Do not edit. # # This is a dynamic resolv.conf file for connecting local clients directly to # all known uplink DNS servers. This file lists all configured search domains. # # Third party programs must not access this file directly, but only through the # symlink at /etc/resolv.conf. To manage man:resolv.conf(5) in a different way, # replace this symlink by a static file or a different symlink. # # See man:systemd-resolved.service(8) for details about the supported modes of # operation for /etc/resolv.conf. nameserver 192.168.3.222 nameserver 192.168.70.80
It is a symlink to /run/systemd/resolve/resolv.conf.
Here is my /etc/netplan/01-network-manager-all.yaml file:
christopher@HAL4:~$ cat /etc/netplan/01-network-manager-all.yaml # Let NetworkManager manage all devices on this system network: version: 2 renderer: NetworkManager ethernets: enp4s0: dhcp4: no addresses: [192.168.2.47/19] gateway4: 192.168.1.1 nameservers: addresses: [192.168.3.222,192.168.70.80]
What happened to my DNS?!