SSHing into my system succeeds but even without the -v flag I get key_load_public: invalid format message. Below is the output w/ using the verbose flag. Specifically debug1: key_load_public: No such file or directory debug1: identity file /home/myname/.ssh/private_rsa_key-cert type -1seems to be the problem as I don't have such a file. However, I checked w/ another system and I also get the same two above lines. However there is no key_load_public: invalid format before that, which is what I actually want to get rid of. Permissions on the authorized_keys file on both remote systems looks the same, permissions on the private_keys look the same too.    $ ssh -v desired_host    OpenSSH_7.2p2, OpenSSL 1.0.2g  1 Mar 2016    debug1: Reading configuration data /home/myname/.ssh/config    debug1: /home/dli/.ssh/config line 16: Applying options for desired_host    debug1: Reading configuration data /etc/ssh_config    debug1: Connecting to desired_host [X.X.X.X] port 22.    debug1: Connection established.    key_load_public: invalid format    debug1: identity file /home/myname/.ssh/private_rsa_key type -1    debug1: key_load_public: No such file or directory    debug1: identity file /home/myname/.ssh/private_rsa_key-cert type -1    debug1: Enabling compatibility mode for protocol 2.0    debug1: Local version string SSH-2.0-OpenSSH_7.2    debug1: Remote protocol version 2.0, remote software version OpenSSH_5.3    debug1: match: OpenSSH_5.3 pat OpenSSH_5* compat 0x0c000000    debug1: Authenticating to desired_host:22 as 'myname'    debug1: SSH2_MSG_KEXINIT sent    debug1: SSH2_MSG_KEXINIT received    debug1: kex: algorithm: diffie-hellman-group-exchange-sha256    debug1: kex: host key algorithm: ssh-rsa    debug1: kex: server->client cipher: aes128-ctr MAC: umac-64@openssh.com compression: none    debug1: kex: client->server cipher: aes128-ctr MAC: umac-64@openssh.com compression: none    debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(2048<3072<8192) sent    debug1: got SSH2_MSG_KEX_DH_GEX_GROUP    debug1: SSH2_MSG_KEX_DH_GEX_INIT sent    debug1: got SSH2_MSG_KEX_DH_GEX_REPLY    debug1: Server host key: ssh-rsa SHA256:EmG/FBK0OCXtaAqAkfHKxoXKLGiZiHUsQpObK6aWd30    debug1: Host 'desired_host' is known and matches the RSA host key.    debug1: Found key in /home/myname/.ssh/known_hosts:39    debug1: rekey after 4294967296 blocks    debug1: SSH2_MSG_NEWKEYS sent    debug1: expecting SSH2_MSG_NEWKEYS    debug1: rekey after 4294967296 blocks    debug1: SSH2_MSG_NEWKEYS received    debug1: SSH2_MSG_SERVICE_ACCEPT received    debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic,password    debug1: Next authentication method: publickey    debug1: Trying private key: /home/myname/.ssh/private_rsa_key    debug1: Authentication succeeded (publickey).    Authenticated to desired_host ([X.X.X.X]:22).    debug1: channel 0: new [client-session]    debug1: Requesting no-more-sessions@openssh.com    debug1: Entering interactive session.    debug1: pledge: network
ssh key_load_public: invalid format warning
ssh;openssh