When installing version 2.6 or higher of the Intel® Software License Manager, it may report that the license file provided is invalid. This can be caused by a mismatch in the hostname between the license file and OS. The license file hostname must contain the entire value returned by running the hostname OS command.
$ hostname myhost.mydomain.com $
The license file must contain myhost.domain.com. If it only has myhost, then it will fail the validation check in the installer.