# 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).