The PS4 was released back in 2013 and has finally been jailbroken, allowing users of the system to run custom applications, game backups, and even install Linux. It's exclusive to users on the 4.55 firmware, though
https://www.notebookcheck.net/PS4-jailbreak-scene-picking-up-steam-with-new-firmware-4-55-exploits.287082.0.html
I got one jailbroked from wavefog.com and pre installed games its better to buy insted and have fun playing.they have free world wide shipping.