In my Linux system, I have installed clamav and clamav-daemon and updated the Checks parameter to 48 in the freshclam.conf (the db url points to a locally run private mirror)
The private mirror has the cvdupdate tool that is properly downloading the latest cvd files.
However, in the local machine, I have observed that neither the cvd files are updated nor the freshclam.log file is updated. But the downloads are successful if I run the freshclam command manually and the log file is also updated with the operations (all the operations are taking place with the clamav user itself).
May I know why is the auto update not happening? I was under the assumption that there need not be a separate cron job to run the freshclam command manually since we have the Checks parameters in the freshclam.conf file and the clamav/clamav-daemon takes care of updating the db files.
Looks like checks has a different purpose but not for scheduling automatic updates. I had to schedule a cron job that executes the db update command using freshclam to update the virus definitions.