我正在運行該命令ssh user@host，然後自動登出。
這是添加標誌的結果-vvv：
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 [host] ([IPADDR]:PORT).
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 [email protected]
debug3: send packet: type 80
debug1: Entering interactive session.
debug1: pledge: network
debug3: receive packet: type 91
debug2: callback start
debug2: fd 4 setting TCP_NODELAY
debug3: ssh_packet_set_tos: set IP_TOS 0x10
debug2: client_session2_setup: id 0
debug2: channel 0: request pty-req confirm 1
debug3: send packet: type 98
debug1: Sending environment.
debug3: Ignored env XDG_SESSION_ID
debug3: Ignored env HOSTNAME
debug3: Ignored env TERM
debug3: Ignored env SHELL
debug3: Ignored env HISTSIZE
debug3: Ignored env IGNOREEOF
debug3: Ignored env SSH_CLIENT
debug3: Ignored env SSH_TTY
debug3: Ignored env QT_GRAPHICSSYSTEM_CHECKED
debug3: Ignored env USER
debug3: Ignored env LS_COLORS
debug3: Ignored env MAIL
debug3: Ignored env PATH
debug3: Ignored env PWD
debug1: Sending env LANG = en_US.UTF-8
debug2: channel 0: request env confirm 0
debug3: send packet: type 98
debug3: Ignored env KDEDIRS
debug3: Ignored env HISTCONTROL
debug3: Ignored env SHLVL
debug3: Ignored env HOME
debug3: Ignored env LOGNAME
debug3: Ignored env XDG_DATA_DIRS
debug3: Ignored env SSH_CONNECTION
debug3: Ignored env LESSOPEN
debug3: Ignored env XDG_RUNTIME_DIR
debug3: Ignored env QT_PLUGIN_PATH
debug3: Ignored env _
debug2: channel 0: request shell confirm 1
debug3: send packet: type 98
debug2: 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
debug2: shell request accepted on channel 0
You have mail.
Last login: Sat Jul 18 21:42:05 2020 from [IPADDR2]
debug3: receive packet: type 98
debug1: client_input_channel_req: channel 0 rtype exit-status reply 0
debug3: receive packet: type 98
debug1: client_input_channel_req: channel 0 rtype [email protected] reply 0
debug2: channel 0: rcvd eow
debug2: channel 0: close_read
debug2: channel 0: input open -> closed
debug3: receive packet: type 96
debug2: channel 0: rcvd eof
debug2: channel 0: output open -> drain
debug2: channel 0: obuf empty
debug2: channel 0: close_write
debug2: channel 0: output drain -> closed
debug3: receive packet: type 97
debug2: channel 0: rcvd close
debug3: channel 0: will not send data after close
debug2: channel 0: almost dead
debug2: channel 0: gc: notify user
debug2: channel 0: gc: user detached
debug2: channel 0: send close
debug3: send packet: type 97
debug2: channel 0: is dead
debug2: channel 0: garbage collecting
debug1: channel 0: free: client-session, nchannels 1
debug3: channel 0: status: The following connections are open:
#0 client-session (t4 r0 i3/0 o3/0 fd -1/-1 cc -1)
debug3: send packet: type 1
Connection to [host] closed.
Transferred: sent 2328, received 2512 bytes, in 0.0 seconds
Bytes per second: sent 222371.7, received 239947.4
debug1: Exit status 1
任何調試此問題的幫助將不勝感激！
答案1
根據調試輸出，ssh驗證成功。然後它在遠端系統上建立互動式 shell 會話。有一些文字似乎是來自遠端系統的典型歡迎訊息，然後會話立即以退出代碼 1 結束。
換句話說，ssh 創建了一個遠端會話，但它立即關閉。有一些事情可能會導致這種情況，並且實際上不可能從調試追蹤中判斷問題出在哪裡：
- 您的遠端 shell 啟動檔案（.bashrc 等）中可能有某些內容會導致 shell 立即退出。
- 您的遠端 shell（/bin/bash 或其他）可能出現問題，導致程式無法啟動。
- 您的帳戶可能被停用或設定為不允許以某種方式進行互動式會話。
- 遠端主機上可能有其他問題，導致其無法啟動 shell 進程。
您可能能夠也可能無法透過 SFTP 進入，這取決於遠端系統上 SFTP 的設定方式。如果您可以透過 SFTP 進入，則可以使用它來檢查、更新或刪除 shell 啟動檔案。或者您可以存取系統日誌（通常在 /var/log 中）以查看是否sshd記錄了有關會話終止原因的任何資訊。