I have two instances running on my aws. I have the same keypair for both of them. I was using both instances for long time. but today I am getting an error on one instance while trying to login through terminal if I run this command.
ssh -i mypem.pem email@example.com Permission denied (publickey).
But If I try to login to other instance with the same
pem file. It works and I can successfully login to it.
I have tried all the solutions
- Permission denied (publickey) when SSH Access to Amazon EC2 instance and
- Trying to SSH into an Amazon Ec2 instance – permission error
but nothing works for me
If I do
ssh -i mypem.pem firstname.lastname@example.org -v
the result is:
OpenSSH_7.4p1, LibreSSL 2.5.0 debug1: Reading configuration data /etc/ssh/ssh_config debug1: Connecting to 52.xx.xxx.xxx [52.xx.xxx.xxx] port 22. debug1: Connection established. debug1: key_load_public: No such file or directory debug1: identity file mypem.pem type -1 debug1: key_load_public: No such file or directory debug1: identity file mypem.pem-cert type -1 debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_7.4 debug1: Remote protocol version 2.0, remote software version OpenSSH_7.4 debug1: match: OpenSSH_7.4 pat OpenSSH* compat 0x04000000 debug1: Authenticating to 52.xx.xxx.xxx as 'ec2-user' debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: kex: algorithm: curve25519-sha256 debug1: kex: host key algorithm: ecdsa-sha2-nistp256 debug1: kex: server->client cipher: email@example.com MAC: <implicit> compression: none debug1: kex: client->server cipher: firstname.lastname@example.org MAC: <implicit> compression: none debug1: expecting SSH2_MSG_KEX_ECDH_REPLY debug1: Server host key: mykeyhere debug1: Host '52.xx.xxx.xxx' is known and matches the ECDSA host key. debug1: Found key in /Users/myusername/.ssh/known_hosts:6 debug1: rekey after 134217728 blocks debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug1: SSH2_MSG_NEWKEYS received debug1: rekey after 134217728 blocks debug1: SSH2_MSG_EXT_INFO received debug1: kex_input_ext_info: server-sig-algs=<rsa-sha2-256,rsa-sha2-512> debug1: SSH2_MSG_SERVICE_ACCEPT received debug1: Authentications that can continue: publickey debug1: Next authentication method: publickey debug1: Offering RSA public key: /Users/myusername/.ssh/mypem.pem debug1: Authentications that can continue: publickey debug1: Trying private key: mypem.pem debug1: Authentications that can continue: publickey debug1: No more authentication methods to try. Permission denied (publickey).
What I have tried
chmod 400 mypem.pem
I have also tried this
sudo ssh -i amazonec2.pem ec2-xxx-xxx-xxx-xxx.us-west 2.compute.amazonaws.com
Please login as the user "ec2-user" rather than the user "root"
then I did this
sudo ssh -i amazonec2.pem ec2-xxx-xxx-xxx-xxx.us-west-2.compute.amazonaws.com -l ec2-user
Permission denied (publickey)
If I try to login to other instance with the same key. I can successfully login. Please help what actually went wrong here
Security Group on my instance is this: