The ramblings of a computer geek
A quick example on Ubuntu Linux 22.04 LTS. I had the need for a particular user to have “passwordless” sudo ability. Its not best practice to do this, however if you are restricting the command or commands that a user can run with “passwordless sudo”, you are balancing functionality and security as well as you […]
More...Keeping a VMware ecosystem up to date is a challenge. Ensuring you are running a supportable and stable combination of VMware ESXi, device drivers, extensions and hardware firmware is a lot of moving parts to keep “in synch”. Essentially the version of the device drivers needs to be supported by VMware ESXi, the version of […]
More...A fairly common error with a fairly easy fix. When adding the Service Pack for Proliant (SPP) I was seeing this error message: “some error occured while online deport registration” The error appears here, the “important notes” gives you the clue to the fix. You need to ensure that your iLO Amplifier appliance(s) are not […]
More...I have multiple monitors, it can be a pain to line them up using the Windows Control Panel too “Rearrange Your Displays”, sometimes you can’t quite get them to line up, what this means is sometimes your mouse will get stuck going between screens. A way round this is to use this neat little tool: […]
More...Tailscale is a great little tool to allow you to setup your VPN between all sorts of devices and without the worry about issues like Firewalls or setting up VPN servers/concentrators. There’s loads of documentation on how to setup Tailscale, so I won’t repeat that here, but i’ll run through a quick example of something […]
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SNMP (Simple Network Management Protocol) is a protocol that can be used for monitoring and managing network connected devices. Personally I use it primarily for monitoring, it is a useful way to interrogate network connected devices for information about their status. For example querying to identify if a power supply has failed on a switch, […]
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NagiosXI has a REST API that can be used to add, edit and remove objects from the configuration. Full details of the configuration and use of this can be found on your installation at: http://nagiosserver.domain.com/nagiosxi/help/?xiwindow=api.php (or you can find it through the Advanced Configuration menu). Each user has an APIKey which can also be found via […]
More...A quick guide to setting up SSH Public Key Authentication. SSH Public Key Authentication means you can authenticate to a remove server via SSH without needing to enter your username and password. Instead you create a public-private key pair, then place the public key on the target server. Then when you SSH to the server […]
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We have a number of 2 node DAGs which provide our Microsoft Exchange 2016 service. Being a 2 node DAG a file share witness server is in place. We had a datacentre event that took out one of the nodes and the witness server, rendering the one of the DAGs unhealthy and a second in […]
More...We run a number of Microsoft Exchange 2016 server (yes I know we need to upgrade), these consist of four, two node DAGs with a pair of shared witness servers. For the purposes of this explanation however, we have a two node Microsoft Exchange 2016 DAG, with a single DAG Witness Server (File Share). Situation […]
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