Question
Has OpenSSH introduced a change that requires \n at the end of the private key file (id_rsa)? Previously I was on Ubuntu 18.04 and I believe id_rsa without \n at the end of the file was working. Now on Ubuntu 20.04, ssh does not work if id_rsa does not have \n at the end of the file.
$ diff id_rsa.bak.od id_rsa.od 163,164c163,164 < 000a20 K E Y - - - - - < 000a29 --- > 000a20 K E Y - - - - - \n > 000a2a Without the \n, it causes the error.
$ ssh -i ~/.ssh/id_rsa ubuntu Load key "/home/hadoop/.ssh/id_rsa": invalid format Environment
$ ssh -V OpenSSH_8.2p1 Ubuntu-4ubuntu0.2, OpenSSL 1.1.1f 31 Mar 2020 $ cat /etc/os-release NAME="Ubuntu" VERSION="20.04.1 LTS (Focal Fossa)" ID=ubuntu ID_LIKE=debian PRETTY_NAME="Ubuntu 20.04.1 LTS" VERSION_ID="20.04" HOME_URL="" SUPPORT_URL="" BUG_REPORT_URL="" PRIVACY_POLICY_URL="" VERSION_CODENAME=focal UBUNTU_CODENAME=focal 
