$ eval $(ssh-agent -s)
 Agent pid 3900
 $ echo "$SSH_PRIVATE_KEY" | tr -d '\r' | ssh-add - > /dev/null
 Identity added: (stdin) (root@XXX.XXX.XXX.XXX)
 $ mkdir -p ~/.ssh
 $ chmod 700 ~/.ssh
 $ ssh-keyscan gitlab.com >> ~/.ssh/known_hosts
 # gitlab.com:22 SSH-2.0-OpenSSH_7.2p2 Ubuntu-4ubuntu2.8
 # gitlab.com:22 SSH-2.0-OpenSSH_7.2p2 Ubuntu-4ubuntu2.8
 # gitlab.com:22 SSH-2.0-OpenSSH_7.2p2 Ubuntu-4ubuntu2.8
 $ chmod 644 ~/.ssh/known_hosts
 $ rsync -e "ssh -v -p 22 -o StrictHostKeyChecking=no" --exclude={.git/,.idea/,.vscode/,node_modules/} -rvcz ./ $SSH_SERVER:/var/www/html/
 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 *
 debug1: Connecting to XXX.XXX.XXX.XXX [XXX.XXX.XXX.XXX] port 22.
 debug1: Connection established.
 debug1: permanently_set_uid: 0/0
 debug1: key_load_public: No such file or directory
 debug1: identity file /root/.ssh/id_rsa type -1
 debug1: key_load_public: No such file or directory
 debug1: identity file /root/.ssh/id_rsa-cert type -1
 debug1: key_load_public: No such file or directory
 debug1: identity file /root/.ssh/id_dsa type -1
 debug1: key_load_public: No such file or directory
 debug1: identity file /root/.ssh/id_dsa-cert type -1
 debug1: key_load_public: No such file or directory
 debug1: identity file /root/.ssh/id_ecdsa type -1
 debug1: key_load_public: No such file or directory
 debug1: identity file /root/.ssh/id_ecdsa-cert type -1
 debug1: key_load_public: No such file or directory
 debug1: identity file /root/.ssh/id_ed25519 type -1
 debug1: key_load_public: No such file or directory
 debug1: identity file /root/.ssh/id_ed25519-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 OpenSSH_7.6p1 Ubuntu-4ubuntu0.3
 debug1: match: OpenSSH_7.6p1 Ubuntu-4ubuntu0.3 pat OpenSSH* compat 0x04000000
 debug1: Authenticating to XXX.XXX.XXX.XXX:22 as 'root'
 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: chacha20-poly1305@openssh.com MAC: <implicit> compression: none
 debug1: kex: client->server cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none
 debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
 debug1: Server host key: ecdsa-sha2-nistp256 SHA256:m+7yf5/qcr1v2GH9MU9TZ8EDcF4CnKJUdZ3xO+FOAtw
 Warning: Permanently added 'XXX.XXX.XXX.XXX' (ECDSA) to the list of known hosts.
 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=<ssh-ed25519,ssh-rsa,rsa-sha2-256,rsa-sha2-512,ssh-dss,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521>
 debug1: SSH2_MSG_SERVICE_ACCEPT received
 debug1: Authentications that can continue: publickey
 debug1: Next authentication method: publickey
 debug1: Offering public key: RSA SHA256:oubUilu+hO1CW93erqN2mx0F/vrXzvW8e4QXjFC6o08 root@XXX.XXX.XXX.XXX
 debug1: Authentications that can continue: publickey
 debug1: Trying private key: /root/.ssh/id_rsa
 debug1: Trying private key: /root/.ssh/id_dsa
 debug1: Trying private key: /root/.ssh/id_ecdsa
 debug1: Trying private key: /root/.ssh/id_ed25519
 debug1: No more authentication methods to try.
 root@XXX.XXX.XXX.XXX: Permission denied (publickey).
 rsync: connection unexpectedly closed (0 bytes received so far) [sender]
 rsync error: error in rsync protocol data stream (code 12) at io.c(235) [sender=3.1.2]