When I update my system using apt update or try to install a new package with aptitude or apt, I receive this error :

Error : GDBus.Error:org.freedesktop.systemd1.UnitMasked : Unit packagekit.service is masked.

I tried this Cannot restart samba, samba.service is masked. This does not fix my problem. I also researched but can't find anything about this problem.

When I run the commands:

 Unit unit.service does not exist, proceeding anyway.

I use Ubuntu Budgie 17.10 - 64 Bit.

  • "When I run the commands:" What does this mean? Which commands did you run?
    – fosslinux
    Mar 20, 2018 at 22:30

1 Answer 1


Try the following commands in a terminal:

sudo systemctl unmask packagekit.service
sudo systemctl start packagekit.service

Then reboot.

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