The ramblings of a computer geek
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 […]
More...Finding the connected clients to a Dell PowerScale storage cluster is fairly straightforward, however you should be aware that it only shows clients that have active IO (input-output) operations in flight at the time you run the command. You can still have clients connected, but are idling, so are invisible. You can also specify a […]
More...If and when a log disk begins to fill up you will see messages such as “Log Disk Exhaustion on <vcenter name>”. Within the vCenter console and VAMI you can see the log drive is running low on space. If you are using VMware HA for vCenter, i.e. two vCenter appliances, you will need to […]
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The “Screen” command is a very useful utility that allows you to create a session (or sessions) which you can run programs in, but in such a way that you can detach from the session (screen) if you needed to logoff your terminal or reboot your client machine, but without loosing what you were doing […]
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Containerisation is an increasingly popular method to deploy and run applications on both your computer but also for enterprise applications. Containerisation essentially bundles an application’s code with all the files and libraries it needs to run. Having a layer of abstraction like this means that as long as you are running the same Operating System, […]
More...I had an issue where my Google Chrome kept on signing me out of my profile every time I closed the browser. Now, there may be a few reasons for this, and you may even want this as a desired approach, but in my case I didn’t want it logging me out of the profile […]
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The capture of network traffic can be useful in troubleshooting issues. Although it is possible to complete this on the switch itself your milage may vary. You require a machine with some packet capture software running and listening on the relevant network interface. XOS In this example we’ll be mirroring port 1 to port 10, […]
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Although its becoming increasingly rare nowadays to be using un-encrypted connections, let’s see what it really means at the network level. Un-encrypted connections on their own are not necessarily a problem, its all about what value what you are sending has and therefore what could be exposed to a nefarious actor. If you are viewing […]
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To install Docker on Ubuntu 22.04.2 LTS you can use these simple instructions, these are based on a standard Ubuntu 22.04.2 LTS installation and using a user called “ubuntu”. Once downloaded make sure it is executable with: Now run the installation with the following, the script has sudo commands added so you may need to […]
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