ManInDark’s Blog

Let’s Encrypt now signs certificates for IP Addresses if you use the shortlived profile. By using this profile the certificates will only be valid for roughly a week, but that isn’t really a problem since they are renewed automatically anyway. This also means you won’t have any problems with shorter certificate lifespans in the future, since the limit will only be reduced to a minimum of 47 days in 2029. For the timeline of how long certificates can be valid, see the CA/B Forum Ballot, the timeline is listed in section 6.3.2. ...

In case you are building your own custom desktop linux system, you may also run into the problem that some characters (particularily east asian) are not displayed correctly. I’ve recently run into exactly this problem with my own custom ublue os and - at least for fedora - the solution is to install the default-fonts-cjk package to get the fonts required to display these characters. To test whether everything is working correctly on your system, you can check a page with many of those characters, like this Japanese Hiragana Unicode Chart.