After making updates I ran check config and got the output below.
Question 1 : "The module could not find the mount point for your home directories filesystem /home. Quotas editing has been disabled."
cat /etc/mtab /dev/simfs / reiserfs rw,usrquota,grpquota 0 0
so it seems to be mounted ok. What should I do to enable quotas?
"Updating Virtualmin library pre-load settings .. Webmin server did not write new PID file"
What is the significance of this error?
The status of your system is being checked to ensure that all enabled features are available, that the mail server is properly configured, and that quotas are active ..
Your system has 7.62 GB of memory, which is at or above the Virtualmin recommended limit of 256 MB.
BIND DNS server is installed, and the system is configured to use it.
Mail server Postfix is installed and configured.
Apache is installed.
Webalizer is installed.
Apache is configured to host SSL websites.
MySQL is installed and running.
ProFTPd is installed.
Logrotate is installed.
SpamAssassin and Procmail are installed and configured for use.
ClamAV is installed and running.
Plugin DAV Login is installed OK.
Plugin AWstats reporting is installed OK.
Plugin Mailman is installed OK.
Plugin Protected web directories is installed OK.
Using network interface venet0:0 for virtual IPs.
IPv6 addresses are available, using interface venet0:0.
Default IP address for virtual servers is 18.104.22.168.
Default IP address is set to 22.214.171.124, which matches the detected external address.
The module could not find the mount point for your home directories filesystem /home. Quotas editing has been disabled.
All commands needed to create and restore backups are installed.
The selected package management and update systems are installed OK.
.. your system is ready for use by Virtualmin.
Updating all Webmin users with new settings.. .. done
Updating Virtualmin library pre-load settings .. Webmin server did not write new PID file