Eric Sloof from NTPRO.NL posted a great video and offered up some great information around VMware's vmkernel system info shell (vsish) on ESX.

In the video, Eric shows you how to enable the Vmkernel System Info Shell (vsish) on an ESX host. 

Eric said, "The vsish is normally only available on an ESXi host but in this video you will see and learn that it’s also working on ESX.  With vsish you can examine the VSI (VMkernel System Information) which can be useful when troubleshooting or adjusting advanced setting that are not exposed in the vSphere Client."

He also said that William Lam over at virtuallyGhetto has retreived a list with all of the 250 hidden advanced settings.  And William created a great article about “What is VMware vsish?”.

** And please note, he also reminds everyone that vsish is able to damage your system, so use it with caution. **

For more information, check out Eric's original post which goes into even more detail, here.

You can watch the HD version of this video on <YouTube> and <ScreenCast>.