I am not going to tell you why you would need to flush your DNS cache (you will know if you need to). So, to flush DNS on a mac simply fire up Terminal and run the following sudo command:
Read more →If the fingerprint of your remote host changes you will see the following error message appear: There are many ways to fix this. The easiest of which is simply to delete your “known_hosts” file. This will mean you just need to accept new finger prints on all your SSH hosts. Yes, this is very lazy…
Read more →If you want to quickly test a URL for changes, then the linux Watch command couple with Curl is a really simple way to hit a URL every n seconds (I use this for blue/green deployment testing to make sure there is no downtime when cutting over):
Read more →Getting an application knocked out with a simple SYN flood is both embarrassing and avoidable. Its also very easy to create a SYN flood and so its something you should design against. Below is the hping3 command line that I use to test my services against SYN floods. I have used quite a few mods, […]
Read more →Today I am a happy bunny!!!! Yury Tsarev (a very clever dude) did a presentation to one of the Kubernetes co-founders Tim Hockin. The demo was one of absa banks opensource projects called K8GB (a cloud native GSLB for K8s): https://www.k8gb.io/ Why do I like K8GB? Because it uses a single CRD that integrates to […]
Read more →I regularly administer Windows 2000 Server and Windows Server 2003 machine using Terminal Services. In W2K I use Terminal Services in Administration mode and in W2K3 I use Remote Desktop. Basically this is the same thing but it’s packaged a bit differently on the two OSes. In both situations there are only 2 users allowed […]
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