The ramblings of a computer geek
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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A simple HTML based status page tool that allows you as a system administrator to just edit a CSV file and have the tool generate you a pre-formatted HTML status page that you can upload to your favourite website. The tool uses Python to read the CSV files for the status (of services) and any […]
More...We had a VMware ESXi host start to display this following a networking instability issue. The host was checked and it did indeed have network redundancy, so this message was not correct, and appeared to be stuck warning about a condition that did not exist. Resolution is given in: https://kb.vmware.com/s/article/2008602, and in our case just […]
More...If you need to reboot a switch at a specific time, you can! Can be helpful for if you were performing a potentially disruptive configuration (where you might get cut off), you can set it to reboot after a specific period of time after you’re going to perform the configuration. Then if the configuration goes […]
More...Following on from my previous post: Static Website Hosting/Publishing Using AWS S3, AWS CloudFront, SSL Certificate And Custom FQDN, I had the need to ensure that a particular file was not cached by CloudFront and instead fetched each time. The particular example was that we wanted to use CloudFront, but in this case the website […]
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