If you want to check if the VMware Tools ISO Image on one of your ESXi hosts is corrupt, perform the following steps.
A reason why you want to check your image is an error like this:
The required VMware Tools ISO image does not exist or is inaccessible.
- open an SSH connection to your ESXi host
- login as root (or as a user with root rights)
- change to /vmimages/tools-isoimages
Check the md5sum for every .iso image with the following command:
Just copy the the images from a working ESXi host of the same version to the ESXi host where the issue occures. You can use a tool like eg. WinSCP for this.