Git on the server is rejecting the key?

Question

linux

Good day to all.
Set up for a couple with admins on the git server.
In general, I generate an ssh key (no password, just press enter 3 times) and throw id_rsa.pub to the admins.
They add it to the git user's authorized_keys file.
I'm trying to git clone [email protected]_of_server:test.git on my site
. They ask me for a password, I don't enter anything and press enter, because I did not put a password on the key itself.
But the server replies: Permission denied, please try again.
And so 2 more times (proposal to enter a password and Permission denied, please try again.), And then it gives out:

Permission denied (publickey,gssapi-keyex,gssapi-with-mic,password).
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

The output of the ssh -vT [email protected]_of_server command is:

OpenSSH_7.2p2 Ubuntu-4ubuntu2.2, OpenSSL 1.0.2g  1 Mar 2016
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug1: Connecting to ip_of_server [ip_of_server] port 22.
debug1: Connection established.
debug1: identity file /home/ruut/.ssh/id_rsa type 1
debug1: key_load_public: No such file or directory
debug1: identity file /home/ruut/.ssh/id_rsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/ruut/.ssh/id_dsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/ruut/.ssh/id_dsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/ruut/.ssh/id_ecdsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/ruut/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/ruut/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/ruut/.ssh/id_ed25519-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_7.2p2 Ubuntu-4ubuntu2.2
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 ip_of_server:22 as 'git'
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: [email protected] compression: none
debug1: kex: client->server cipher: aes128-ctr MAC: [email protected] 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:s3z1TtniRQyx1X8ttot06w5e5Qz7ZQRtjSmnNyjB77A
debug1: Host 'ip_of_server' is known and matches the RSA host key.
debug1: Found key in /home/ruut/.ssh/known_hosts:2
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: gssapi-keyex
debug1: No valid Key exchange context
debug1: Next authentication method: gssapi-with-mic
debug1: Unspecified GSS failure.  Minor code may provide more information
No Kerberos credentials available

debug1: Unspecified GSS failure.  Minor code may provide more information
No Kerberos credentials available

debug1: Unspecified GSS failure.  Minor code may provide more information


debug1: Unspecified GSS failure.  Minor code may provide more information
No Kerberos credentials available

debug1: Next authentication method: publickey
debug1: Offering RSA public key: /home/ruut/.ssh/id_rsa
debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic,password
debug1: Trying private key: /home/ruut/.ssh/id_dsa
debug1: Trying private key: /home/ruut/.ssh/id_ecdsa
debug1: Trying private key: /home/ruut/.ssh/id_ed25519
debug1: Next authentication method: password
[email protected]_of_server's password: 
]debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic,password
Permission denied, please try again.
[email protected]_of_server's password: 
debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic,password
Permission denied, please try again.
[email protected]_of_server's password: 
debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic,password
debug1: No more authentication methods to try.
Permission denied (publickey,gssapi-keyex,gssapi-with-mic,password).

On the server: CentOS and git versions - 1.7.1
I have: ubuntu 16.04, git - 2.7.4
Please tell me what is the problem?

Answer 1

On GitHub (or any other remote storage) was the key added to the account?