Where do I get domain names for systemd?
Ideally, when using DHCP protocol, local domain names should be obtained from DHCP server instead of being specified explicitly in configuration file of network interface above. See UseDomains= option. However there are still outstanding issues with this feature – see systemd-networkd DHCP search domains option issue.
How to configure the search domain.name?
On most unix-like OS like Solaris, Debian, etc. the solution is to add a line with ‘ search domain.name ‘ to /etc/resolv.conf but modern Ubuntu releases use systemd-resolved now, so I had to figure out what to do. Thankfully, it’s still only one line – just using the resolvectl command now instead of editing a text file:
How to check if my search domain is working?
To verify it’s working, make sure domain is listed by systemd-resolved by invoking: and that it’s in the auto-generated /etc/resolv.conf by invoking: And try ssh or http using a hostname instead of a FQDN to see if the configured local domain resolves automatically.
How to troubleshoot DNS with systemd-resolved?
We can do this in /etc/systemd/resolved.conf file: Caution! Above guarantees apply only when names are being resolved by systemd-resolved – see man page for nss-resolve, libnss_resolve.so.2 and man page for systemd-resolved.service, systemd-resolved. How to troubleshoot DNS with systemd-resolved?
How to configure systemd resolved and systemd networkd?
I would like to configure systemd-resolved and systemd-networkd so that lookup requests for local hostnames would be directed (routed) exclusively to local DNS server and lookup requests for all other hostnames would be directed exclusively to another, remote DNS server.
What are the keys for systemd.network configuration?
The following keys are accepted: A whitespace-separated list of hardware addresses. Use full colon-, hyphen- or dot-delimited hexadecimal. See the example below. This option may appear more than once, in which case the lists are merged.
Where are the files for systemd.network located?
The .network files are read from the files located in the system network directories /usr/lib/systemd/network and /usr/local/lib/systemd/network, the volatile runtime network directory /run/systemd/network and the local administration network directory /etc/systemd/network.