panachemidi@labrador:~$ sudo apt install unityhub
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
unityhub is already the newest version (3.11.0).
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
1 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] Y
Setting up unityhub (3.11.0) ...
update-alternatives is /usr/bin/update-alternatives
/var/lib/dpkg/info/unityhub.postinst: line 18: update-desktop-database: command not found
Cache read/write disabled: interface file missing. (Kernel needs AppArmor 2.4 compatibility patch.)
Warning: unable to find a suitable fs in /proc/mounts, is it mounted?
Use --subdomainfs to override.
dpkg: error processing package unityhub (--configure):
installed unityhub package post-installation script subprocess returned error exit status 1
Errors were encountered while processing:
unityhub
E: Sub-process /usr/bin/dpkg returned an error code (1)
panachemidi@labrador:~$ sudo apt install unityhub
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
unityhub is already the newest version (3.11.0).
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
1 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] Y
Setting up unityhub (3.11.0) ...
update-alternatives is /usr/bin/update-alternatives
/var/lib/dpkg/info/unityhub.postinst: line 18: update-desktop-database: command not found
Cache read/write disabled: interface file missing. (Kernel needs AppArmor 2.4 compatibility patch.)
Warning: unable to find a suitable fs in /proc/mounts, is it mounted?
Use --subdomainfs to override.
dpkg: error processing package unityhub (--configure):
installed unityhub package post-installation script subprocess returned error exit status 1
Errors were encountered while processing:
unityhub
E: Sub-process /usr/bin/dpkg returned an error code (1)