The ramblings of a computer geek
I’ve recently passed the CISSP exam. Passing the exam is just one step in becoming a Certified Information System Security Professional, once you’ve passed the exam there are additional steps required to achieve the certification. There is a lot of chatter about exactly how long the process takes to get registered after the exam, so … Read more
You may see the following error when attempting to perform an upgrade to a host, the issue is also described in: https://www.vcloudnine.de/upgrade-to-esxi-7-0-missing-dependencies-vibs-error/ We came across this issue when attempting to upgrade to version 7.0.3 of VMware ESXi, these hosts had some driver VIB updates performed over their lifetime to remediate PSOD issues. Upon attempting an … Read more
At about 15:00 on 1st November 2022, my FTTP broadband disconnected. Upon looking at the BT Openreach ONT, I saw the following light condition. Power Green (Solid) LOS (Loss of Service) Red (Solid) PON Off LAN Green (Solid with blinking occasionally) Unfortunately I don’t have a video or picture of this state, but needless to … Read more
On the 2nd November 2002, the SSL certificate for the site expired, however now 1and1 IONOS seem to no longer allow SSL certificates to be used on their web hosting if they do not also hold and manage the DNS and domain. Pretty poor show, but I expect its something to do with ensuring the … Read more
You may find you need to perform a check where the FQDN you are monitoring doesn’t correspond to the IP address and some form of virtual server (or host headers) are in use. Now normally using a command like: Should just work however in certain instances depending on the configuration of the web server you’ll … Read more
If you are having trouble uploading a file via SCP to vCenter then VMware provide a great document on how to resolve this. You’ll be seeing an error like: https://kb.vmware.com/s/article/2107727 Essentially what you need to do is logon via SSH to vCenter, swap the Shell to BASH, upload the file, then swap the Shell back … Read more
Running a disk test need not be complicated. Microsoft provide a cheeky little hard disk test program that can be used, you can download it from https://github.com/microsoft/diskspd. A simple run can be completed with the following command to test the hard drive performance based on the parameters entered. If you wish you can add “> … Read more
Hashing allows you to create a message digest of a file, essentially a summary of the file, so you can determine if that file has changed during transit. It has lots of purposes such as ensuring non-repudiation, but in this example I’m using the MD5 hash to verify that the file has been downloaded correctly. … Read more
We were performing the migration to new Distributed Switches (running a later version) ready for our vCenter 7.x and ESXi 7.x upgrade and when attempting to remove a host from a distributed switch we got this error: VMware has an article KB76959 that describes this issue, however in our case rather than the VM (or … Read more
The collection of user requirements can be a difficult and time-consuming process, working towards Agile principles the collection of requirements should be a collaborative process helping the requestor (customer/colleague) to discover what they want through requirements collection sessions to build a document that contains the necessary information for the design teams to build a solution … Read more