I uninstalled clamav withapt-get remove --purge clamavbut still I have this 100MB folder:du -shc /var/lib/clamavWhy is this not deleted on purge? And how can I find out if some other installed program still uses this folder?
removing clamav with purge leaves database
apt;disk usage;clamav
clamav on at least Debian (you don't mention what distro you're using) doesn't contain the database. For that clamav has a dependency on clamav-freshclam | clamav-data so make sure that both of those are also purged.