I have been trying to update to the latest version of opnsense but I get so far into it and it errors out saying and I quot " pkg-static: cached package clamav-1.2.0_1,1: missing or size mismatch, cannot continue
Consider running 'pkg update -f' "
So how do I do this command 'pkg update -f'
Enable SSH in System > Settings > Administration > Secure Shell Server. Then use SSH to log on.
Before you do that, try changing your mirror and running an upgrade audit. I think that will clear out any bad cached packages and let you perform the upgrade.