How do I backup and restore GitLab Mattermost so it preserves usernames?

I would like to be able to backup and restore GitLab Mattermost so it preserves the usernames along with the messages. So far I’ve got it to preserve the messages, but it replaces all the usernames with “Someone”. I have reviewed Mattermost’s backup documentation: I’m using PostgreSQL, so I followed their link to the PostgreSQL…

Details

Why is my isc-dhcp-server not handing out the router address to clients with reserved addresses?

I’m running isc-dhcp-server on Ubuntu 18.04. Clients without a DHCP reservation are able to get an IP address, subnet mask, default gateway and DNS servers from the pool no problem. As soon as I define a reservation, the client will correctly get the reserved IP address, subnet mask and DNS servers, however the default gateway…

Details