So I wanted to free up disk space from documentation and followed the instructions in this answer. Basically I did create a file /etc/dpkg/dpkg.cfg.d/01_nodoc which specifies the desired filters:
path-exclude /usr/share/doc/* # we need to keep copyright files for legal reasons path-include /usr/share/doc/*/copyright path-exclude /usr/share/man/* path-exclude /usr/share/groff/* path-exclude /usr/share/info/* # lintian stuff is small, but really unnecessary path-exclude /usr/share/lintian/* path-exclude /usr/share/linda/*
Then you I manually removed any documentation already installed:
find /usr/share/doc -depth -type f ! -name copyright|xargs rm || true find /usr/share/doc -empty|xargs rmdir || true rm -rf /usr/share/groff/* /usr/share/info/* rm -rf /usr/share/man/* /usr/share/lintian/* /usr/share/linda/* /var/cache/man/*
This freed up space alright but it also deleted my man pages, which I didn't want. I searched and I'm not the only casualty of this. Basically, as the described in the answer in the last link, in order to fix this I tried to remove the lines matching /usr/share/man and /usr/share/groff from /etc/dpkg/dpkg.cfg.d/01_nodoc, then reinstall groff, man-db, manpages. However, it didn't work for me as I still see just an empty man page when I type any man command, for example:
and just blank man page (it opens but blank).
I also tried reinstalling the manpages-posix package as suggested in this thread but also doesn't work, still all blank, apparently not a single man page present.
Seems like the system may be broken so any ideas on how can I solve this?
EDIT: Here's my df -h output
S.ficheros Tamaño Usados Disp Uso% Montado en udev 7.8G 0 7.8G 0% /dev tmpfs 1.6G 1.9M 1.6G 1% /run /dev/sda1 30G 24G 4.5G 85% / tmpfs 7.8G 147M 7.7G 2% /dev/shm tmpfs 5.0M 4.0K 5.0M 1% /run/lock tmpfs 7.8G 0 7.8G 0% /sys/fs/cgroup /dev/loop0 4.2M 4.2M 0 100% /snap/gnome-calculator/406 /dev/loop1 90M 90M 0 100% /snap/core/6818 /dev/loop2 3.8M 3.8M 0 100% /snap/gnome-system-monitor/81 /dev/loop4 20M 20M 0 100% /snap/gdoc-html-cleaner/3 /dev/loop3 15M 15M 0 100% /snap/gnome-characters/258 /dev/loop5 1.0M 1.0M 0 100% /snap/gnome-logs/61 /dev/loop6 236M 236M 0 100% /snap/kde-frameworks-5/27 /dev/loop7 896K 896K 0 100% /snap/pomodoro/3 /dev/loop9 152M 152M 0 100% /snap/gnome-3-28-1804/40 /dev/loop8 8.5M 8.5M 0 100% /snap/canonical-livepatch/77 /dev/loop10 54M 54M 0 100% /snap/core18/941 /dev/loop11 36M 36M 0 100% /snap/gtk-common-themes/1198 /dev/loop12 106M 106M 0 100% /snap/shotcut/45 /dev/sda6 426G 336G 69G 84% /home tmpfs 1.6G 76K 1.6G 1% /run/user/1000