Processing triggers for man-db

Might be helpful for someone: I ran into this issue on our CI regularly.

Just execute the following:

sudo apt-get remove -y --purge man-db

The command removes the man-db package completely, which in our case on CI, was completely useless anyway.

It's possible the mandb index is corrupted.

check the index and recreate it

sudo mandb -t
rm -rf /var/cache/man
sudo mandb -c

I had something similar just after installing Ubuntu 18.04 on Windows Subsystem for Linux and running update and upgrade: it got stuck at processing triggers for man-db (2.8.3-2). And also later, after running

sudo apt install python3-pip

My solution: I just waited. In the second case even some 15 minutes. I do not know whether this is normal, as I am very new to Linux. But this so people just know another experience if they run into the same problem.

I have had the same problem when I was installing apache web server on my digital ocean droplet. After waited a bit, I simply just stop the process and rerun the command. It shows the apache is already installed and it worked. I hope it can still help.