In any case, "sed -i" can be used to add new keys, and remove old ones, from a set of ~/.ssh/authorized_keys files on a collection of hosts. It is good to be a

In any case, "sed -i" can be used to add new keys, and remove old ones, from a set of ~/.ssh/authorized_keys files on a collection of hosts. It is good to be aware of the contents of these allowed credentials, and sweep unused entries. This article has a script that automates the procedure: https://www.linuxjournal.com/content/ssh-key-rotation-posix-shell-sunset-nears-elderly-keys https://www.linuxjournal.com/content/ssh-key-rotation-posix-...