Category: All Linux HowTo’s

This article demonstrates how to ensure hosts authenticate before communicating with the Zabbix server and that communications use TLS. TIP: This setup is based on an “active” monitoring setup. In other words, the Zabbix server doesn’t pro-actively connect to the clients (the servers being monitored) but rather wait for connections

This article demonstrates how to add and remove a disk from a virtual machine running in KVM. We’re using CentOS 6 but the same works with CentOS 7. First list the disks attached to the virtual machine before we add the new disk. Run the following command while logged into

We have a server with a bunch of hard disks that need to be combined to create one large filesystem. Further to that, we want some redundancy so we’ll need RAID. In our case, we’ll be using RAID 6. In this walk-through, we’re using a CentOS 7 server with 7

This article shows how to create a custom AWS IAM policy to allow snapshots. The first code snippet is what works but as you can see, it’s liberal. The second snippet is what “should” would but doesn’t. I’d love some feedback on this. This works but is too broad: {

This article will help you if you’re receiving any of the following error messages. The short answer is that you need to reboot the server. Can’t connect to system DBus: Error calling StartServiceByName for org.freedesktop.problems: GDBus.Error:org.freedesktop.DBus.Error.TimedOut: Failed to activate service ‘org.freedesktop.problems’: timed out …and ‘abrt-cli status’ timed out I was

This article demonstrates how to downgrade an RDS MySQL instance from multi-availability-zone (Multi-AZ) to a single instance (single zone). The process is simple and worked well in my test. If I was to do this in a production environment, I would a) dump the database first just in-case the process