First search for open libreoffice files:
ps aux | grep libre
For example the output of mine is:
hadi 21426 0.1 0.0 205328 3468 ? Sl 14:17 0:00 /usr/lib/libreoffice/program/oosplash --writer
hadi 21445 9.8 0.7 1269272 179872 ? Sl 14:17 0:01 /usr/lib/libreoffice/program/soffice.bin --writer --splash-pipe=6
then
sudo kill -9 ID
the ID is the second number for (soffice.bin) not for oosplash
so in my example:
sudo kill -9 21445
You need professional Ok:
ps aux | grep -i office | awk {'print $2'} | xargs kill -9
hope this is professional in your evaluation!!
or more minified command
kill -9 `pgrep -lf soffice.bin | awk {'print $1'}`
or more minified minified minified command
pkill soffice.bin
EDIT:
All libreoffice open files take the same PID, for that you can't just kill writer and keep impess for example.
And to prove my point of view the recovery tool in office is unique for all files. What i mean if you close a writer in imporper way and then open an impress for example then impress will request you to recovery the writer file and it did so and this proves my answer
-9
? It is better to use-9
only when you know what you are doing.