[drofmij]

for ubuntu command check here: https://askubuntu.com/questions/992137/how-to-check-that-kpt...

Here is one of the commands recommended in that thread:

grep -q "cpu_insecure\|cpu_meltdown\|kaiser" /proc/cpuinfo && echo "patched :)" \ || echo "unpatched :("

[the_af]

That line worked for me, but do note the first command listed in the answer you linked to is NOT reliable and is not always consistent with the next two commands.

[yorby]

This command appears to work in Fedora too...