お仕事マシンのfont-ricty-diminished 4.0.1-1ではバックティックは期待どおり表示されている。Xubuntu 21.04では4.1.1-3で問題がある。古いバージョンを入れてみればいいのかな？
https://launchpad.net/ubuntu/+source/fonts-ricty-diminished からView full publishing historyを辿って https://launchpad.net/ubuntu/+source/fonts-ricty-diminished/4.0.1-1 をみつけてBinary packages built by this sourceを辿ってamd64のDownloadable filesをダウンロードしてみよう。
入ったかな？
$ sudo apt install ./fonts-ricty-diminished_4.0.1-1_all.deb
:
Note, selecting 'fonts-ricty-diminished' instead of './fonts-ricty-diminished_4.0.1-1_all.deb'
The following packages were automatically installed and are no longer required:
gnome-terminal-data libnautilus-extension1a
Use 'sudo apt autoremove' to remove them.
The following packages will be DOWNGRADED:
fonts-ricty-diminished
0 upgraded, 0 newly installed, 1 downgraded, 0 to remove and 0 not upgraded.
Need to get 0 B/2,981 kB of archives.
:
dpkg: warning: downgrading fonts-ricty-diminished from 4.1.1-3 to 4.0.1-1
(Reading database ... 214774 files and directories currently installed.)
:
Setting up fonts-ricty-diminished (4.0.1-1) ...
Processing triggers for fontconfig (2.13.1-4.2ubuntu3) ...
N: Download is performed unsandboxed as root as file '/home/system/Downloads/fonts-ricty-diminished_4.0.1-1_all.deb' couldn't be accessed by user '_apt'. - pkgAcquire::Run (13: Permission denied)
