【问题现象】
执行git review出现认证不通过，重新生成ssh key也会报错
使用公钥和私钥访问git review时出现不支持public key。而且反复配置公钥和私钥对对报一样的错误，无法连接。但是使用密码访问正常，而且ssh端口也是正常的。可以使用ssh打印报错信息访问。
icey@icey$ git review
Problem running 'git remote update gerrit'
Fetching gerrit
test@192.168.6.14: Permission denied (publickey).
fatal: Could not read from remote repository.
Please make sure you have the correct access rights
and the repository exists.
error: could not fetch gerrit
【问题分析】
使用ssh 连接查看报错信息，发现找不到可以连接的方式，由于老版本gitlab只支持rsa256，故无法通过认证
icey@icey-KVM:$ ssh -vv -T -p 29418 192.168.6.14
OpenSSH_9.0p1 Ubuntu-1ubuntu7.1, OpenSSL 3.0.5 5 Jul 2022
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: include /etc/ssh/ssh_config.d/*.conf matched no files
debug1: /etc/ssh/ssh_config line 21: Applying options for *
debug2: resolve_canonicalize: hostname 10.127.6.14 is address
debug1: Connecting to 10.127.6.14 [10.127.6.14] port 29418.
debug1: Connection established.
debug1: identity file /home/icey/.ssh/id_rsa type 0
debug1: identity file /home/icey/.ssh/id_rsa-cert type -1
debug1: identity file /home/icey/.ssh/id_ecdsa type -1
debug1: identity file /home/icey/.ssh/id_ecdsa-cert type -1
debug1: identity file /home/icey/.ssh/id_ecdsa_sk type -1
debug1: identity file /home/icey/.ssh/id_ecdsa_sk-cert type -1
debug1: identity file /home/icey/.ssh/id_ed25519 type -1
debug1: identity file /home/icey/.ssh/id_ed25519-cert type -1
debug1: identity file /home/icey/.ssh/id_ed25519_sk type -1
debug1: identity file /home/icey/.ssh/id_ed25519_sk-cert type -1
debug1: identity file /home/icey/.ssh/id_xmss type -1
debug1: identity file /home/icey/.ssh/id_xmss-cert type -1
debug1: identity file /home/icey/.ssh/id_dsa type -1
debug1: identity file /home/icey/.ssh/id_dsa-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_9.0p1 Ubuntu-1ubuntu7.1
debug1: Remote protocol version 2.0, remote software version GerritCodeReview_2.16.21 (SSHD-CORE-2.0.0)
debug1: compat_banner: no match: GerritCodeReview_2.16.21 (SSHD-CORE-2.0.0)
debug2: fd 3 setting O_NONBLOCK
debug1: Authenticating to 10.127.6.14:29418 as 'icey'
debug1: load_hostkeys: fopen /home/icey/.ssh/known_hosts2: No such file or directory
debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts: No such file or directory
debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts2: No such file or directory
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug2: local client KEXINIT proposal
debug2: KEX algorithms: sntrup761x25519-sha512@openssh.com,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-group14-sha256,ext-info-c
debug2: host key algorithms: ssh-ed25519-cert-v01@openssh.com,ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,sk-ssh-ed25519-cert-v01@openssh.com,sk-ecdsa-sha2-nistp256-cert-v01@openssh.com,rsa-sha2-512-cert-v01@openssh.com,rsa-sha2-256-cert-v01@openssh.com,ssh-ed25519,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,sk-ssh-ed25519@openssh.com,sk-ecdsa-sha2-nistp256@openssh.com,rsa-sha2-512,rsa-sha2-256
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: ecdh-sha2-nistp521,ecdh-sha2-nistp384,ecdh-sha2-nistp256,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group18-sha512,diffie-hellman-group17-sha512,diffie-hellman-group16-sha512,diffie-hellman-group15-sha512,diffie-hellman-group14-sha256,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: host key algorithms: ssh-rsa,ecdsa-sha2-nistp256,ssh-ed25519,ecdsa-sha2-nistp521,ecdsa-sha2-nistp384
debug2: ciphers ctos: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,aes192-cbc,aes256-cbc
debug2: ciphers stoc: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,aes192-cbc,aes256-cbc
debug2: MACs ctos: hmac-md5,hmac-sha1,hmac-sha2-256,hmac-sha2-512,hmac-sha1-96,hmac-md5-96
debug2: MACs stoc: hmac-md5,hmac-sha1,hmac-sha2-256,hmac-sha2-512,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: ecdh-sha2-nistp256
debug1: kex: host key algorithm: ssh-ed25519
debug1: kex: server->client cipher: aes128-ctr MAC: hmac-sha2-256 compression: none
debug1: kex: client->server cipher: aes128-ctr MAC: hmac-sha2-256 compression: none
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: SSH2_MSG_KEX_ECDH_REPLY received
debug1: Server host key: ssh-ed25519 SHA256:F0JBLk5SHTam78I9hbV4mSoo1dk4ZezB45zrdO7ImBY
debug1: load_hostkeys: fopen /home/icey/.ssh/known_hosts2: No such file or directory
debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts: No such file or directory
debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts2: No such file or directory
debug1: Host '[10.127.6.14]:29418' is known and matches the ED25519 host key.
debug1: Found key in /home/icey/.ssh/known_hosts:4
debug2: ssh_set_newkeys: mode 1
debug1: rekey out after 4294967296 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug2: ssh_set_newkeys: mode 0
debug1: rekey in after 4294967296 blocks
debug1: Will attempt key: /home/icey/.ssh/id_rsa RSA SHA256:c485lKsWVeAW+YVr2MaNbvyUffd2WKOXtTLh2R5gJrw
debug1: Will attempt key: /home/icey/.ssh/id_ecdsa
debug1: Will attempt key: /home/icey/.ssh/id_ecdsa_sk
debug1: Will attempt key: /home/icey/.ssh/id_ed25519
debug1: Will attempt key: /home/icey/.ssh/id_ed25519_sk
debug1: Will attempt key: /home/icey/.ssh/id_xmss
debug1: Will attempt key: /home/icey/.ssh/id_dsa
debug2: pubkey_prepare: done
debug2: service_accept: ssh-userauth
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Offering public key: /home/icey/.ssh/id_rsa RSA SHA256:c485lKsWVeAW+YVr2MaNbvyUffd2WKOXtTLh2R5gJrw
debug1: send_pubkey_test: no mutual signature algorithm
debug1: Trying private key: /home/icey/.ssh/id_ecdsa
debug1: Trying private key: /home/icey/.ssh/id_ecdsa_sk
debug1: Trying private key: /home/icey/.ssh/id_ed25519
debug1: Trying private key: /home/icey/.ssh/id_ed25519_sk
debug1: Trying private key: /home/icey/.ssh/id_xmss
debug1: Trying private key: /home/icey/.ssh/id_dsa
debug2: we did not send a packet, disable method
debug1: No more authentication methods to try.
icey@10.127.6.14: Permission denied (publickey).
【解决办法】
开启ssh rsa认证方式，创建~/.ssh/config文件，并开启ssh-rsa认证
Host 192.168.6.14
HostKeyAlgorithms +ssh-rsa
PubkeyAcceptedKeyTypes +ssh-rsa
Host 192.168.6.15
HostKeyAlgorithms +ssh-rsa
PubkeyAcceptedKeyTypes +ssh-rsa
