How to find version of installed liberation fonts - liberationfonts/liberation-fonts GitHub Wiki
Ways to get version of installed liberation-fonts in different distribution or operating system
Fedora Linux:
$ rpm -qa | grep liberation-fonts
Debian Linux:
$ dpkg -s fonts-liberation2 | grep -i version
or
$ apt show fonts-liberation2 | grep -i version
Arch Linux:
$ pacman -Q | grep *liberation*
Windows 10:
1. open RUN or Windows+R
2. Type fonts in the empty box and click OK
3. Find liberation font file right click and choose preview.