There are many ways to switch on NumLock in Linux. Some methods do not work. I used this one before:
1. Switch NumLock on at startup using numlockx in .xinitrc
apt install numlockx
cat .xinitrc
#!/bin/shif [ -e /usr/bin/numlockx ]; then
/usr/bin/numlockx on
fi
But now i prefer simpler way, using Xfce4 settings.
2. Enable NumLock in Xfce4 settings
Go to Main button (Applications) - Settings - Settings editor - keyboards - find property NumLock or add new property NumLock, then check field value.
This is the simplest way.
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