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Re:Ubuntu 16.04: “Out of memory” errors after upgrade to 4.4... by alyandon on Sunday January 29, 2017 @11:45AM (#13514965)
Take off the xargs part of the command and run it to see. :-D

Just looking at it though, it looks like it'll purge kernel packages that are the currently booted one. I don't have a system handy to check though so take that with a grain of salt.

Re:Ubuntu 16.04: “Out of memory” errors after upgrade to 4.4... by alyandon on Sunday January 29, 2017 @11:24PM (#13518641)
Just for posterity that should have been "are not the currently booted one".