無法使用授權密鑰 ssh，總是提示密碼

我在這裡瀏覽了幾篇文章試圖糾正這個問題，但我無法這樣做。

幾天前，使用authorized_keys映射的伺服器登錄停止工作，沒有人更改文件或文件夾本身，我是唯一一個操縱伺服器的人。

在這裡的一些文章之後，我嘗試重新創建 ssh 密鑰集並重命名舊的 .ssh 文件夾，但它沒有用。

另一篇文章提到我必須將 .ssh 的權限更改為 750 並在生成全新的 .ssh 後再次重新創建 authorized_keys 文件，但效果不佳。

Linux ssh 文件夾

有人可以幫我解決這個問題嗎？我不是高級使用者。

linux伺服器是CentOS 7

編輯

ssh -vvv 在伺服器中按要求的輸出：

$ ssh -vvv root@131.72.xxx.xxx
OpenSSH_8.2p1, OpenSSL 1.1.1e  17 Mar 2020
debug1: Reading configuration data /etc/ssh/ssh_config
debug2: resolve_canonicalize: hostname 131.72.xxx.xxx is address
debug2: ssh_connect_direct
debug1: Connecting to 131.72.222.241 [131.72.xxx.xxx] port 22.
debug1: Connection established.
debug1: identity file /c/Users/Andre Fr\303\263es/.ssh/id_rsa type 0
debug1: identity file /c/Users/Andre Fr\303\263es/.ssh/id_rsa-cert type -1
debug1: identity file /c/Users/Andre Fr\303\263es/.ssh/id_dsa type -1
debug1: identity file /c/Users/Andre Fr\303\263es/.ssh/id_dsa-cert type -1
debug1: identity file /c/Users/Andre Fr\303\263es/.ssh/id_ecdsa type -1
debug1: identity file /c/Users/Andre Fr\303\263es/.ssh/id_ecdsa-cert type -1
debug1: identity file /c/Users/Andre Fr\303\263es/.ssh/id_ecdsa_sk type -1
debug1: identity file /c/Users/Andre Fr\303\263es/.ssh/id_ecdsa_sk-cert type -1
debug1: identity file /c/Users/Andre Fr\303\263es/.ssh/id_ed25519 type -1
debug1: identity file /c/Users/Andre Fr\303\263es/.ssh/id_ed25519-cert type -1
debug1: identity file /c/Users/Andre Fr\303\263es/.ssh/id_ed25519_sk type -1
debug1: identity file /c/Users/Andre Fr\303\263es/.ssh/id_ed25519_sk-cert type -1
debug1: identity file /c/Users/Andre Fr\303\263es/.ssh/id_xmss type -1
debug1: identity file /c/Users/Andre Fr\303\263es/.ssh/id_xmss-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_8.2
debug1: Remote protocol version 2.0, remote software version OpenSSH_7.4
debug1: match: OpenSSH_7.4 pat OpenSSH_7.0*,OpenSSH_7.1*,OpenSSH_7.2*,OpenSSH_7.3*,OpenSSH_7.4*,OpenSSH_7.5*,OpenSSH_7.6*,OpenSSH_7.7* compat 0x04000002
debug2: fd 3 setting O_NONBLOCK
debug1: Authenticating to 131.72.xxx.xxx:22 as 'root'
debug3: hostkeys_foreach: reading file "/c/Users/Andre Fr\303\263es/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file /c/Users/Andre Fr\303\263es/.ssh/known_hosts:4
debug3: load_hostkeys: loaded 1 keys from 131.72.xxx.xxx
debug3: order_hostkeyalgs: prefer hostkeyalgs: ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521
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-group14-sha256,ext-info-c
debug2: host key algorithms: ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,sk-ecdsa-sha2-nistp256-cert-v01@openssh.com,ssh-ed25519-cert-v01@openssh.com,sk-ssh-ed25519-cert-v01@openssh.com,rsa-sha2-512-cert-v01@openssh.com,rsa-sha2-256-cert-v01@openssh.com,ssh-rsa-cert-v01@openssh.com,sk-ecdsa-sha2-nistp256@openssh.com,ssh-ed25519,sk-ssh-ed25519@openssh.com,rsa-sha2-512,rsa-sha2-256,ssh-rsa
debug2: ciphers ctos: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com,aes128-cbc,3des-cbc,aes256-cbc,aes192-cbc
debug2: ciphers stoc: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com,aes128-cbc,3des-cbc,aes256-cbc,aes192-cbc
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: 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,diffie-hellman-group1-sha1
debug2: host key algorithms: ssh-rsa,rsa-sha2-512,rsa-sha2-256,ecdsa-sha2-nistp256,ssh-ed25519
debug2: ciphers ctos: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com,aes128-cbc,aes192-cbc,aes256-cbc,blowfish-cbc,cast128-cbc,3des-cbc
debug2: ciphers stoc: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com,aes128-cbc,aes192-cbc,aes256-cbc,blowfish-cbc,cast128-cbc,3des-cbc
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
debug2: compression stoc: none,zlib@openssh.com
debug2: languages ctos:
debug2: languages stoc:
debug2: first_kex_follows 0
debug2: reserved 0
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
debug3: send packet: type 30
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug3: receive packet: type 31
debug1: Server host key: ecdsa-sha2-nistp256 SHA256:oDemkeTUNqSXDkAz6sx/w/978fNZR4QQsIYFfdb0BiA
debug3: hostkeys_foreach: reading file "/c/Users/Andre Fr\303\263es/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file /c/Users/Andre Fr\303\263es/.ssh/known_hosts:4
debug3: load_hostkeys: loaded 1 keys from 131.72.xxx.xxx
debug1: Host '131.72.xxx.xxx' is known and matches the ECDSA host key.
debug1: Found key in /c/Users/Andre Fr\303\263es/.ssh/known_hosts:4
debug3: send packet: type 21
debug2: set_newkeys: mode 1
debug1: rekey out after 134217728 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 in after 134217728 blocks
debug1: Will attempt key: /c/Users/Andre Fr\303\263es/.ssh/id_rsa RSA SHA256:MgYlmw9i3/fmZCu8+0uIjZZu4qer+zJnKBh7epHx26w
debug1: Will attempt key: /c/Users/Andre Fr\303\263es/.ssh/id_dsa
debug1: Will attempt key: /c/Users/Andre Fr\303\263es/.ssh/id_ecdsa
debug1: Will attempt key: /c/Users/Andre Fr\303\263es/.ssh/id_ecdsa_sk
debug1: Will attempt key: /c/Users/Andre Fr\303\263es/.ssh/id_ed25519
debug1: Will attempt key: /c/Users/Andre Fr\303\263es/.ssh/id_ed25519_sk
debug1: Will attempt key: /c/Users/Andre Fr\303\263es/.ssh/id_xmss
debug2: pubkey_prepare: done
debug3: send packet: type 5
debug3: receive packet: type 7
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<rsa-sha2-256,rsa-sha2-512>
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,gssapi-keyex,gssapi-with-mic,password
debug3: start over, passed a different list publickey,gssapi-keyex,gssapi-with-mic,password
debug3: preferred 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: Offering public key: /c/Users/Andre Fr\303\263es/.ssh/id_rsa RSA SHA256:MgYlmw9i3/fmZCu8+0uIjZZu4qer+zJnKBh7epHx26w
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,gssapi-keyex,gssapi-with-mic,password
debug1: Trying private key: /c/Users/Andre Fr\303\263es/.ssh/id_dsa
debug3: no such identity: /c/Users/Andre Fr\303\263es/.ssh/id_dsa: No such file or directory
debug1: Trying private key: /c/Users/Andre Fr\303\263es/.ssh/id_ecdsa
debug3: no such identity: /c/Users/Andre Fr\303\263es/.ssh/id_ecdsa: No such file or directory
debug1: Trying private key: /c/Users/Andre Fr\303\263es/.ssh/id_ecdsa_sk
debug3: no such identity: /c/Users/Andre Fr\303\263es/.ssh/id_ecdsa_sk: No such file or directory
debug1: Trying private key: /c/Users/Andre Fr\303\263es/.ssh/id_ed25519
debug3: no such identity: /c/Users/Andre Fr\303\263es/.ssh/id_ed25519: No such file or directory
debug1: Trying private key: /c/Users/Andre Fr\303\263es/.ssh/id_ed25519_sk
debug3: no such identity: /c/Users/Andre Fr\303\263es/.ssh/id_ed25519_sk: No such file or directory
debug1: Trying private key: /c/Users/Andre Fr\303\263es/.ssh/id_xmss
debug3: no such identity: /c/Users/Andre Fr\303\263es/.ssh/id_xmss: No such file or directory
debug2: we did not send a packet, disable method
debug3: authmethod_lookup password
debug3: remaining preferred: ,password
debug3: authmethod_is_enabled password
debug1: Next authentication method: password
root@131.72.xxx.xxx's password:
debug3: send packet: type 50
debug2: we sent a password packet, wait for reply
debug3: receive packet: type 52
debug1: Authentication succeeded (password).
Authenticated to 131.72.xxx.xxx ([131.72.xxx.xxx]:22).
debug1: channel 0: new [client-session]
debug3: ssh_session2_open: channel_new: 0
debug2: channel 0: send open
debug3: send packet: type 90
debug1: Requesting no-more-sessions@openssh.com
debug3: send packet: type 80
debug1: Entering interactive session.
debug1: pledge: network
debug3: receive packet: type 80
debug1: client_input_global_request: rtype hostkeys-00@openssh.com want_reply 0
debug3: receive packet: type 4
debug1: Remote: Ignored authorized keys: bad ownership or modes for directory /root
debug3: receive packet: type 91
debug2: channel_input_open_confirmation: channel 0: callback start
debug2: fd 3 setting TCP_NODELAY
debug3: ssh_packet_set_tos: set IP_TOS 0x48
debug2: client_session2_setup: id 0
debug2: channel 0: request pty-req confirm 1
debug3: send packet: type 98
debug2: channel 0: request shell confirm 1
debug3: send packet: type 98
debug2: channel_input_open_confirmation: channel 0: callback done
debug2: channel 0: open confirm rwindow 0 rmax 32768
debug3: receive packet: type 99
debug2: channel_input_status_confirm: type 99 id 0
debug2: PTY allocation request accepted on channel 0
debug2: channel 0: rcvd adjust 2097152
debug3: receive packet: type 99
debug2: channel_input_status_confirm: type 99 id 0

當您顯示 ls -lah ./ssh 時，在您的第一個映像（Linux ssh 文件夾）中，您在 /root 上擁有錯誤的所有權，可以看到 ../ 擁有所有權 suporte.sutic。

chown -R root.root /root

chmod 0550 /root

chmod 0700 /root/.ssh

chmod 0600 /root/.ssh/authorized_keys

檢查/etc/ssh/sshd_config它有一個Authentication部分。檢查PubkeyAuthentication未設置為no. 路徑的配置AuthorizedKeysFile也在那裡設置。檢查這些設置，必要時調整它們並使用 .restart 重新啟動 sshd 服務systemctl restart sshd。如果sshd_config文件看起來不錯，使用journalctl -u sshd它將顯示與 sshd 相關的所有消息和錯誤調查問題。如果 AuthorizedKeysFile 存在權限問題，它應該在那裡。

編輯：在重新啟動 sshd 之前檢查 journalctl 以降低將自己完全鎖定在伺服器之外的風險。

引用自：https://serverfault.com/questions/1041098