Manpages broken on Ubuntu 16.04

Question

I have the same problem as in this question but with Ubuntu.

Reinstall man pages & fix man

I tried everything but the problem persists. When I try and view a manpage I get an empty page. What can I do about it?

When I try to view my own manpage I get this error:

$ man -l openshell2017/opsh/man/opsh.1
man: command exited with status 3: /usr/lib/man-db/zsoelim | preconv -e UTF-8 | tbl | nroff -mandoc -Tutf8 It seems the bug also is reported at this link.

It is also a bug reported at Launchpad: https://bugs.launchpad.net/ubuntu/+source/man-db/+bug/1389682

I think what I did was remove all the manpages to save disk space and then I reinstalled them.

Answer 1

I ran into this issue (which was down to disk corruption in my case) and I fixed it by reinstalling the groff-base package:

sudo apt-get install --reinstall groff-base

Answer 2

groff: can't find DESC' file groff:fatal error: invalid device utf8

That suggests your groff setup is borked or you have more than one and man is using the wrong one.

Changing your locale to "C" (dispensing with UTF-8 for now, in that shell) might make your your manpages viewable again. You want to look at grops(1) and grotty(1), in the FILES section. That will tell you where the grops/grotty DESC file is; there should be one for UTF-8, too.

In my system, I have

$ ls /usr/share/groff/1.22.3/font/dev[aup]*/DESC
/usr/share/groff/1.22.3/font/devascii/DESC
/usr/share/groff/1.22.3/font/devpdf/DESC
/usr/share/groff/1.22.3/font/devps/DESC
/usr/share/groff/1.22.3/font/devutf8/DESC

If you don't find devutf8/DESC, your groff installation is incomplete (wrt to UTF-8). If you do find it, you'll want to make see if you have two groff installations and, if so, if man(1) is using the right one.

To verify your groff installation can render your man page without man(1), you can use groff directly,

$ nroff -t -e -mandoc openshell2017/opsh/man/opsh.1 | less