Running a common composer command, post an upgrade on the server to Centos 7 and I received the following error: /usr/local/bin/composer: line 8: 6210 KilledThe "Killed" message usually means that your process consumed too much memory, so you may simply need to add more memory to your system if possible.  You can increase the memory, however, note that you shouldn't be doing this action on a production server, and additionally you shouldn't be using composer update at all....