PowerShell Compare-Hash Function

Quite some time ago I created a PowerShell function which allowed one to compare a given cryptographic hash against one locally generated to see if they match. Looking back on the old version (here is a link to the blog article https://www.bytesizedalex.com/powershell-cryptographic-hash-checker/) it is very much reminiscent of old school batch files. I decided now … Read morePowerShell Compare-Hash Function

VMware vCenter Certificate Management Default Values

If you have ever replaced VMware vCenter server certificates you will know that there are default values for common SSL/TLS certificate attributes, for example country code and organisation name. By default VMware have their own details for these attributes as shown below – Country – US E-mail – [email protected] Locality – Palo Alto Organisational Unit … Read moreVMware vCenter Certificate Management Default Values

Unexpected Large Page File Troubleshooting

This week one of my colleagues has been performing updates on our hypervisor hosts including those running Hyper-V. During this work we received alerts from our monitoring system to indicate two of the hosts had essentially run out of disk space, obviously a little worrying. We stopped the update process while troubleshooting was carried out … Read moreUnexpected Large Page File Troubleshooting

Set Cluster Log Size and Verbosity in Microsoft Server 2008 R2

Recently a critical cluster system had a bit of a hiccup wherein the SQL resource failed between nodes a few times and then gave up. Most of my clusters run on Microsoft Server 2012 R2 so I tend to use PowerShell for everything, in this case the cluster is an older one running Server 2008 … Read moreSet Cluster Log Size and Verbosity in Microsoft Server 2008 R2

Supermicro IPMI Power On Server via SSH

Running two Supermicro SYS-5028D-TN4T servers for my home lab has required me to learn a new IPMI (Intelligent Platform Management Interface) web interface and command language. In this case I’m going to share how to power on a Supermicro server. While it is of course possible to connect via a web browser to the IPMI … Read moreSupermicro IPMI Power On Server via SSH

VMware vRealize Log Insight Deployment

If you have a VMware environment and you haven’t yet deployed the vRealize Log Insight appliance you really should. While the ‘Log Insight’ platform is a licensed product VMware do provide it with a number of free licenses included so depending on your environment size you may not even need to pay. In this post … Read moreVMware vRealize Log Insight Deployment

HPE C7000 Blade Chassis SSL Certificate Replacement

The SSL/TLS certificates on my HPE (Hewlett Packard Enterprise) C7000 blade chassis expired this week and therefore required replacing. I’m a strong believer in always replacing certificates with valid ones generated by a certificate authority (CA). In my mind there isn’t much excuse in a business to not have an internal CA for this sort … Read moreHPE C7000 Blade Chassis SSL Certificate Replacement

HPE 3PAR Logical Disk Not Mapped to Virtual Volume

I came across this issue while reviewing the output of the checkhealth –detail command run from the 3PAR command line. This command provides a more detailed view (as per the switch) of any health issues including those experienced in the Logical Disk (LD) subsystem.  The specific error ‘LDs not mapped to a volume’ may happen … Read moreHPE 3PAR Logical Disk Not Mapped to Virtual Volume

HPE 3PAR Change DNS Settings

I recently setup a DNS iApp on the F5 load balancers in my datacenters and felt it was time to migrate the Hewlett Packard Enterprise (HPE) 3PAR storage arrays DNS to point to this new virtual IP (VIP) rather than to the static DNS server it currently used. I will demonstrate the command line syntax for … Read moreHPE 3PAR Change DNS Settings

Windows Server Core Expand Volume

I am trying to run as many of my Windows server home lab virtual machines (VM) as Core installs. This reduces the resource requirement for each VM in terms of drive space, memory and CPU – obviously a good thing in any environment. It also forces me to learn more ways of dealing with situations, … Read moreWindows Server Core Expand Volume