Proxmox Firewall Primer
21 May 2025
4:31 pm
Background Sooner rather than later your servers and routers will be attacked. This is especially so if you run a large network (>100 servers), and
Knowledgebase
ZFS Primer
19 May 2025
7:04 pm
Sometimes your ZFS drives on your disk runs away with you. Then you quickly need commands to see what ZFS disk is the busiest. Try
Canon printer asking for username / password
1 May 2025
11:21 am
Open the file /etc/cups/cups-files.conf. Find the group name at the line containing SystemGroup (in Ubuntu it should be lpadmin). Add yourself to that group (sudo usermod -a -G lpadmin
KernelCare Broken Warnings and Looping about Free Symlink Protection on WHM/cPanel servers
26 April 2025
7:25 am
On a cPanel server you may see this warning: You’ll notice the link “Add KernelCare’s Free Symlink Protection” but clicking it bring up either a
How to do a free naked domain redirect
26 April 2025
6:14 am
Some sites such as ghs.googlehosted.com. requires you to use a CNAME www.example.com to ghs.googlehosted.com.. However, without www., the site won’t work. The solution can be
Emails from StandardBank.co.za to a cPanel hosted server fails with bodyhash_mismatch – DKIM issues
21 May 2025
cPanel bodyhas_mismatch Emails from StandardBank.co.za to a cPanel hosted server fails with bodyhash_mismatch – DKIM issues Email from standardbank.co.za might fail with bodyhash_mismatch. Since it’s
Proxmox Firewall Primer
21 May 2025
Background Sooner rather than later your servers and routers will be attacked. This is especially so if you run a large network (>100 servers), and
For some domains on a Virtualmin server, log file rotation and enabling / disabling is problematic
21 May 2025
On a large Virtualmin server, for some domains, you might encounter the following issue when enabling and disabling log rotation using the command line. The
Virtualmin doesn’t upgrade: How to fix invalid signature Virtualmin apt packages
21 May 2025
Whilst updating Virtualmin, you might get this error: Err:6 https://software.virtualmin.com/vm/6/gpl/apt virtualmin-focal InRelease The following signatures were invalid: EXPKEYSIG D9F9010760D62A6B Virtualmin, Inc. (Package signing key for
CentOS is out of date – yum upgrade is failing – Fixes for yum update and yum upgrade
21 May 2025
CentOS 7 Is Broken for Upgrade In the last few year RedHat destroyed CentOS 7. Now we’ve moved on to Debian, Ubuntu, and Alma Linux.