How to check CPU microcode revision in ESXi

Occasionally ESXi users want to check CPU microcode. You can check CPU microcode revision on running ESXi host this easy way.

[root@tanzu-esxi-1:~] vsish -e cat /hardware/cpu/cpuList/0 | grep -i -E 'family|model|stepping|microcode|revision'
   Family:0x06
   Model:0x25
   Stepping:0x01
   Number of microcode updates:0
   Original Revision:0x0000001f
   Current Revision:0x0000001f

More info: Using the ESXi 6.0 CPU Microcode Loading Feature

Author: Daniel Micanek

Senior Service Architect, SAP/TDL Platform Services Team at Vivicta | vExpert ⭐⭐⭐⭐⭐⭐⭐ | Broadcom Knight: vSphere Kubernetes Service, VCF Networking (NSX), VCF Automation | Broadcom Software Knight: vSphere | Cisco Champion. Notes from running about 1,000 ESXi hosts on Cisco UCS, VCF 9 and SAP HANA on vSphere.