title: AWS SSH Permission denied (publickey)
body: <p>I am trying to connect to my AWS EC2 instance from my Linux machine but I am having trouble doing so. I tried it at home before and it worked so I'm confused as to why it is not working now that I am at school.</p>
  
  <p>I ram <code>chmod 400 "Key 1.pem"</code> first.</p>
  
  <p>Then I typed <code>ssh -i "Key 1.pem" ubuntu@ec2-xx-xx-xxx-xxx.eu-west-2.compute.amazonaws.com -vvv</code></p>
  
  <p>And here is the output:</p>
  
  <pre><code>OpenSSH_7.6p1 Ubuntu-4ubuntu0.3, OpenSSL 1.0.2n  7 Dec 2017
  debug1: Reading configuration data /etc/ssh/ssh_config
  debug1: /etc/ssh/ssh_config line 19: Applying options for *
  debug2: resolving "ec2-xx-xx-xxx-xxx.eu-west-2.compute.amazonaws.com" port 22
  debug2: ssh_connect_direct: needpriv 0
  debug1: Connecting to ec2-xx-xx-xxx-xxx.eu-west-2.compute.amazonaws.com [xx.xx.xxx.xxx] port 22.
  debug1: Connection established.
  debug1: key_load_public: No such file or directory
  debug1: identity file Key 1.pem type -1
  debug1: key_load_public: No such file or directory
  debug1: identity file Key 1.pem-cert type -1
  debug1: Local version string SSH-2.0-OpenSSH_7.6p1 Ubuntu-4ubuntu0.3
  debug1: Remote protocol version 2.0, remote software version PaloAltoNetworks_0.2
  debug1: no match: PaloAltoNetworks_0.2
  debug2: fd 3 setting O_NONBLOCK
  debug1: Authenticating to ec2-xx-xx-xxx-xxx.eu-west-2.compute.amazonaws.com:22 as 'ubuntu'
  debug3: hostkeys_foreach: reading file "/home/x/.ssh/known_hosts"
  debug3: record_hostkey: found key type RSA in file /home/x/.ssh/known_hosts:9
  debug3: load_hostkeys: loaded 1 keys from ec2-xx-xx-xxx-xxx.eu-west-2.compute.amazonaws.com
  debug3: order_hostkeyalgs: prefer hostkeyalgs: ssh-rsa-cert-v01@openssh.com,rsa-sha2-512,rsa-sha2-256,ssh-rsa
  debug3: send packet: type 20
  debug1: SSH2_MSG_KEXINIT sent
  debug3: receive packet: type 20
  debug1: SSH2_MSG_KEXINIT received
  debug2: local client KEXINIT proposal
  debug2: KEX algorithms: curve25519-sha256,curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha256,diffie-hellman-group14-sha1,ext-info-c
  debug2: host key algorithms: ssh-rsa-cert-v01@openssh.com,rsa-sha2-512,rsa-sha2-256,ssh-rsa,ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ssh-ed25519-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519
  debug2: ciphers ctos: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com
  debug2: ciphers stoc: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com
  debug2: MACs ctos: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
  debug2: MACs stoc: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
  debug2: compression ctos: none,zlib@openssh.com,zlib
  debug2: compression stoc: none,zlib@openssh.com,zlib
  debug2: languages ctos: 
  debug2: languages stoc: 
  debug2: first_kex_follows 0 
  debug2: reserved 0 
  debug2: peer server KEXINIT proposal
  debug2: KEX algorithms: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1
  debug2: host key algorithms: ssh-rsa,ssh-dss
  debug2: ciphers ctos: aes128-ctr,aes192-ctr,aes256-ctr,aes128-cbc,aes192-cbc,aes256-cbc
  debug2: ciphers stoc: aes128-ctr,aes192-ctr,aes256-ctr,aes128-cbc,aes192-cbc,aes256-cbc
  debug2: MACs ctos: hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
  debug2: MACs stoc: hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
  debug2: compression ctos: none
  debug2: compression stoc: none
  debug2: languages ctos: 
  debug2: languages stoc: 
  debug2: first_kex_follows 0 
  debug2: reserved 0 
  debug1: kex: algorithm: diffie-hellman-group-exchange-sha256
  debug1: kex: host key algorithm: ssh-rsa
  debug1: kex: server-&gt;client cipher: aes128-ctr MAC: hmac-sha1 compression: none
  debug1: kex: client-&gt;server cipher: aes128-ctr MAC: hmac-sha1 compression: none
  debug3: send packet: type 34
  debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(2048&lt;7680&lt;8192) sent
  debug3: receive packet: type 31
  debug1: got SSH2_MSG_KEX_DH_GEX_GROUP
  debug2: bits set: 1070/2048
  debug3: send packet: type 32
  debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
  debug3: receive packet: type 33
  debug1: got SSH2_MSG_KEX_DH_GEX_REPLY
  debug1: Server host key: ssh-rsa SHA256:/mAko/GQWYyseCLdwLcgdK5StHC0mLU1aX7LqdtGXWw
  debug3: hostkeys_foreach: reading file "/home/x/.ssh/known_hosts"
  debug3: record_hostkey: found key type RSA in file /home/x/.ssh/known_hosts:9
  debug3: load_hostkeys: loaded 1 keys from ec2-xx-xx-xxx-xxx.eu-west-2.compute.amazonaws.com
  debug3: hostkeys_foreach: reading file "/home/x/.ssh/known_hosts"
  debug3: record_hostkey: found key type RSA in file /home/x/.ssh/known_hosts:10
  debug3: load_hostkeys: loaded 1 keys from xx.xx.xxx.xxx
  debug1: Host 'ec2-xx-xx-xxx-xxx.eu-west-2.compute.amazonaws.com' is known and matches the RSA host key.
  debug1: Found key in /home/x/.ssh/known_hosts:9
  debug2: bits set: 1006/2048
  debug3: send packet: type 21
  debug2: set_newkeys: mode 1
  debug1: rekey after 4294967296 blocks
  debug1: SSH2_MSG_NEWKEYS sent
  debug1: expecting SSH2_MSG_NEWKEYS
  debug3: receive packet: type 21
  debug1: SSH2_MSG_NEWKEYS received
  debug2: set_newkeys: mode 0
  debug1: rekey after 4294967296 blocks
  debug2: key: Key 1.pem ((nil)), explicit
  debug3: send packet: type 5
  debug3: receive packet: type 6
  debug2: service_accept: ssh-userauth
  debug1: SSH2_MSG_SERVICE_ACCEPT received
  debug3: send packet: type 50
  debug3: receive packet: type 51
  debug1: Authentications that can continue: publickey
  debug3: start over, passed a different list publickey
  debug3: preferred gssapi-keyex,gssapi-with-mic,publickey,keyboard-interactive,password
  debug3: authmethod_lookup publickey
  debug3: remaining preferred: keyboard-interactive,password
  debug3: authmethod_is_enabled publickey
  debug1: Next authentication method: publickey
  debug1: Trying private key: Key 1.pem
  debug3: sign_and_send_pubkey: RSA SHA256:0DyNPm5i8KfJCXH+hiFUW0CCnOMLu8uh1PEzjW0OO5w
  debug3: send packet: type 50
  debug2: we sent a publickey packet, wait for reply
  debug3: receive packet: type 51
  debug1: Authentications that can continue: publickey
  debug2: we did not send a packet, disable method
  debug1: No more authentication methods to try.
  ubuntu@ec2-xx-xx-xxx-xxx.eu-west-2.compute.amazonaws.com: Permission denied (publickey).
  </code></pre>
  
  <p>I don't know why this isn't working. Could someone please help?</p>
  
  <p>Thanks.</p>
  
  <p>EDIT: I even tried mounting my volume to a different instance but I had exactly the same problem, even when generating a new key.</p>