# Checking the Version and Build Number
To check the version and build number of Photon OS, concatenate `/etc/photon-release`.
Example:
cat /etc/photon-release
VMware Photon Linux 1.0
PHOTON_BUILD_NUMBER=a6f0f63
The build number in the results maps to the commit number on the VMware Photon OS GitHub [commits page](https://github.com/vmware/photon/commits/master).