Linux Quickies
Administration[edit]
apt - Find a package by its exact name[edit]
Normally apt search does a full text search for the specified needle by processing all package names and descriptions. If you want it to use the package names only, use this option instead:
apt search --names-only PACKAGENAME
And if you'd like to find an exact match you can use this expression here:
apt search ^PACKAGENAME$
Configure systemd-resolv to resolve local virtualhosts[edit]
Several distributions like Ubuntu Server now use systemd-resolv for DNS resolution, but this breaks resolving local virtualhosts (subdomains) hosted on this server.
If your network interface is configured via DHCP you should be able to opt-into UseDomains by creating
/etc/systemd/network/usedomains.network
with this content:
[DNS] UseDomains=true
Source: bugs.launchpad.net #1699660 See also: A name resolution issue with systemd-resolved we found in the wild