No, I'm not going to undo this. IS shouldn't be running a pre-xenial OpenSSH on xenial machines in the first place, and it's good to fix that; and anything older than that is well out of support anyway.
No, I'm not going to undo this. IS shouldn't be running a pre-xenial OpenSSH on xenial machines in the first place, and it's good to fix that; and anything older than that is well out of support anyway.