我已经在 StackExchange 和其他地方搜索了一段时间了。这些修复似乎都不适合我（或者只解决了问题的一部分）。
我正在尝试进入正在运行的 Raspberry Pi 3，Linux raspberrypi 4.9.59-v7+ #1047 SMP Sun Oct 29 12:19:23 GMT 2017 armv71. 我尝试将其用作服务器，将 Windows 10 Pro 桌面用作客户端（通过 Ubuntu Windows 10 终端应用程序）。通过 PuTTY 执行此操作并启用 X11 转发，效果很好。然而，通过 Ubuntu 应用程序执行此操作ssh -X -v user@server，然后使用 xlogo 进行测试，只会出现Error: Can't open display:.
我在登录后通过 ssh 进行 X11 转发的调试中发现了这一点：debug1: X11 forwarding requested but DISPLAY not set。当我echo $DISPLAY在登录时运行时，结果出现一个空行。
我在服务器的文件中设置了以下选项/etc/ssh/sshd_config：
Port 22
Address Family inet
X11Forwarding yes
X11DisplayOffset 10
X11UseLocalhost no
PrintMotd no
PrintLastLog yes
TCPKeepAlive yes
该命令sudo service ssh status会生成一堆行，表明 OpenBSD Secure Shell 服务器处于活动状态（正在运行）。
在我的客户端上，文件中只有以下几行（全部由我编写）〜/ .ssh /配置:
Forward X11 yes
ForwardAgent yes
我也尝试过命令，ssh -Y -v user@server但无济于事（X11转发显示问题仍然存在）。
另外，我尝试过编辑/etc/默认/ssh我的服务器中的文件要添加-4传递给 sshd 的选项。该文件现在包含以下几行：
# Options to pass to sshd
SSHD_OPTS=-4
请注意，我已经尝试过x标志直接在我的客户端上，它会导致相同的错误，但如果我直接在我的服务器上尝试它，它工作得很好。另外，为了让 PuTTY 方法发挥作用，我使用小明并在 PuTTY 运行时运行它。
我已经export DISPLAY=:10.0在服务器上尝试过，然后重新启动 ssh 服务器并重新启动并使用 ssh 重新登录，但它没有改变任何内容。在客户端上尝试此命令并重新登录等，会导致新错误（debug1: failure x11并且之后x标志，Error: Can't open display: server:10.0其中“server”是我在 user@server 登录名中的名字）。
我对这个话题不是很了解，所以如果我做了或没有说一些愚蠢的事情，请告诉我。谢谢。
编辑：由于 Kenster 的要求，从 -vvv 输出。不确定是否有好的格式化方法。新来这个网站！
myname@myname-PC:~$ ssh -vvv -X user@server
OpenSSH_7.2p2 Ubuntu-4ubuntu2.4, OpenSSL 1.0.2g 1 Mar 2016
debug1: Reading configuration data /home/myname/.ssh/config
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug2: resolving "raspberrypi" port 22
debug2: ssh_connect_direct: needpriv 0
debug1: Connecting to raspberrypi [192.168.1.124] port 22.
debug1: Connection established.
debug1: key_load_public: No such file or directory
debug1: identity file /home/myname/.ssh/id_rsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/myname/.ssh/id_rsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/myname/.ssh/id_dsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/myname/.ssh/id_dsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/myname/.ssh/id_ecdsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/myname/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/myname/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/myname/.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-4ubuntu2.4
debug1: Remote protocol version 2.0, remote software version OpenSSH_7.4p1 Raspbian-10+deb9u2
debug1: match: OpenSSH_7.4p1 Raspbian-10+deb9u2 pat OpenSSH* compat 0x04000000
debug2: fd 3 setting O_NONBLOCK
debug1: Authenticating to raspberrypi:22 as 'pi'
debug3: hostkeys_foreach: reading file "/home/myname/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file /home/myname/.ssh/known_hosts:1
debug3: load_hostkeys: loaded 1 keys from raspberrypi
debug3: order_hostkeyalgs: prefer hostkeyalgs: [email protected],[email protected],[email protected],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: [email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,ext-info-c
debug2: host key algorithms: [email protected],[email protected],[email protected],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,[email protected],[email protected],ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa
debug2: ciphers ctos: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected],aes128-cbc,aes192-cbc,aes256-cbc,3des-cbc
debug2: ciphers stoc: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected],aes128-cbc,aes192-cbc,aes256-cbc,3des-cbc
debug2: MACs ctos: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: compression ctos: none,[email protected],zlib
debug2: compression stoc: none,[email protected],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,[email protected],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,diffie-hellman-group14-sha1
debug2: host key algorithms: ssh-rsa,rsa-sha2-512,rsa-sha2-256,ecdsa-sha2-nistp256,ssh-ed25519
debug2: ciphers ctos: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected]
debug2: ciphers stoc: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected]
debug2: MACs ctos: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: compression ctos: none,[email protected]
debug2: compression stoc: none,[email protected]
debug2: languages ctos:
debug2: languages stoc:
debug2: first_kex_follows 0
debug2: reserved 0
debug1: kex: algorithm: [email protected]
debug1: kex: host key algorithm: ecdsa-sha2-nistp256
debug1: kex: server->client cipher: [email protected] MAC: <implicit> compression: none
debug1: kex: client->server cipher: [email protected] 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:SwUQGmGCYHVAinSJ2TmUxr5lN6Hutu70nZEhrIJ36iQ
debug3: hostkeys_foreach: reading file "/home/myname/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file /home/myname/.ssh/known_hosts:1
debug3: load_hostkeys: loaded 1 keys from raspberrypi
debug3: hostkeys_foreach: reading file "/home/myname/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file /home/myname/.ssh/known_hosts:2
debug3: load_hostkeys: loaded 1 keys from 192.168.1.124
debug1: Host 'raspberrypi' is known and matches the ECDSA host key.
debug1: Found key in /home/myname/.ssh/known_hosts:1
debug3: send packet: type 21
debug2: set_newkeys: mode 1
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug3: receive packet: type 21
debug2: set_newkeys: mode 0
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS received
debug2: key: /home/myname/.ssh/id_rsa ((nil))
debug2: key: /home/myname/.ssh/id_dsa ((nil))
debug2: key: /home/myname/.ssh/id_ecdsa ((nil))
debug2: key: /home/myname/.ssh/id_ed25519 ((nil))
debug3: send packet: type 5
debug3: receive packet: type 7
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<ssh-ed25519,ssh-rsa,ssh-dss,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521>
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,password
debug3: start over, passed a different list publickey,password
debug3: preferred gssapi-keyex,gssapi-with-mic,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: Trying private key: /home/myname/.ssh/id_rsa
debug3: no such identity: /home/myname/.ssh/id_rsa: No such file or directory
debug1: Trying private key: /home/myname/.ssh/id_dsa
debug3: no such identity: /home/myname/.ssh/id_dsa: No such file or directory
debug1: Trying private key: /home/myname/.ssh/id_ecdsa
debug3: no such identity: /home/myname/.ssh/id_ecdsa: No such file or directory
debug1: Trying private key: /home/myname/.ssh/id_ed25519
debug3: no such identity: /home/myname/.ssh/id_ed25519: 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
user@server'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 raspberrypi ([192.168.1.124]: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 [email protected]
debug3: send packet: type 80
debug1: Entering interactive session.
debug1: pledge: exec
debug3: receive packet: type 80
debug1: client_input_global_request: rtype [email protected] want_reply 0
debug3: receive packet: type 91
debug2: callback start
debug1: X11 forwarding requested but DISPLAY not set
debug2: fd 3 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 SHELL
debug3: Ignored env TERM
debug3: Ignored env USER
debug3: Ignored env NAME
debug3: Ignored env LS_COLORS
debug3: Ignored env HOSTTYPE
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 SHLVL
debug3: Ignored env HOME
debug3: Ignored env LOGNAME
debug3: Ignored env XDG_DATA_DIRS
debug3: Ignored env LESSOPEN
debug3: Ignored env LESSCLOSE
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
Linux raspberrypi 4.9.59-v7+ #1047 SMP Sun Oct 29 12:19:23 GMT 2017 armv7l
The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.
Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
Last login: Thu Mar 1 23:14:26 2018 from 192.168.1.8
user@server:~ $ debug2: client_check_window_change: changed
debug2: channel 0: request window-change confirm 0
debug3: send packet: type 98
user@server:~ $ xterm &
[1] 5043
user@server:~ $ xterm: Xt error: Can't open display:
xterm: DISPLAY is not set
^C
[1]+ Exit 1 xterm
user@server:~ $
答案1
我看到该消息是debug1: X11 forwarding requested but DISPLAY not set因为在连接到主机之前我没有在 shell 中设置 DISPLAY 环境变量。我正在将“Bash on Windows”与 openssh 一起使用。
以下是需要做的事情：
samik@mysystem:~$ export DISPLAY=localhost:0.0
samik@mysystem:~$ ssh -X samik@remotehost