Ubuntu Windows10アプリ-X11転送-$ DISPLAYエラー
私はしばらくの間、StackExchangeなどを検索してきました。どの修正も機能しないようです（または問題の一部のみを修正します）。
Linux raspberrypi 4.9.59-v7+ #1047 SMP Sun Oct 29 12:19:23 GMT 2017 armv71.を実行しているRaspberry Pi 3にアクセスしようとしています。サーバーとして使用し、Windows 10 Proデスクトップをクライアントとして使用しようとしています（Ubuntu Windows 10ターミナルアプリを使用）。 X11 Forwardingを有効にしてPuTTYを介してそれを行うと、正常に動作します。ただし、Ubuntuアプリでssh -X -v user@serverを使用してそれを実行し、xlogoでテストすると、Error: Can't open display:が得られます。
ログイン後のsshを介したX11転送のデバッグでこれが見つかりました：debug1: X11 forwarding requested but DISPLAY not set。ログイン中にecho $DISPLAYを実行すると、結果として空白行が表示されます。
サーバーの/etc/ssh/sshd_configファイルに次のオプションを設定しました：
Port 22
Address Family inet
X11Forwarding yes
X11DisplayOffset 10
X11UseLocalhost no
PrintMotd no
PrintLastLog yes
TCPKeepAlive yes
コマンドSudo service ssh statusは、OpenBSD Secure Shell Serverがアクティブ（実行中）であることを示す一連の行を生成します。
私のクライアントでは、ファイル〜/ .ssh/configに次の行のみ（すべて私が記述）があります。
Forward X11 yes
ForwardAgent yes
コマンドssh -Y -v user@serverも試してみましたが、まだ役に立ちません（X11転送のDISPLAYの問題はまだあります）。
また、サーバーの/ etc/default/sshファイルを編集して、sshdに渡されるオプションに-4を追加してみました。ファイルには次の行が含まれています。
# Options to pass to sshd
SSHD_OPTS=-4
クライアントで直接xlogoを試したところ、同じエラーが発生することに注意してください。ただし、サーバーで直接試した場合は問題なく動作します。また、PuTTYメソッドを機能させるには、XMingを使用して、PuTTYの実行中に実行します。
サーバーでexport DISPLAY=:10.0を試してからsshサーバーを再起動し、再起動してsshで再ログインしましたが、何も変わりません。このコマンドをクライアントで試行して再度ログインするなどすると、新しいエラーが発生します（debug1: failure x11以降xlogo、Error: Can't open display: server:10.0の後、「server」は私の名前です。 user @ server login）。
私はそのトピックについてあまり知識がありません。ですから、私がしている、または言っていないばかげたことがある場合は、私に知らせてください。ありがとう。
編集：-vvvからの出力。これをフォーマットする良い方法があるかどうかわかりません。このサイトは初めてです！
myname@myname-PC:~$ 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:~ $
debug1: X11 forwarding requested but DISPLAY not setホストに接続する前にシェルでDISPLAY環境変数を設定していなかったためです。 opensshで「Bash on Windows」を使用しています。
ここに何をする必要があるかです：
samik@mysystem:~$ export DISPLAY=localhost:0.0
samik@mysystem:~$ ssh -X samik@remotehost