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I'm just trying to forward a simple gedit window from one Fedora laptop to another. The gedit command opens a gedit window on the "server" laptop, instead of opening a forwarded X11 window on the "client" laptop.

Note: no instances of geditare running on the server when the ssh command is executed from the client (the command does leave an instance on the server, so I kill it directly from another ssh connection before trying again).

server /etc/ssh/sshd_config

X11Forwarding yes
X11DisplayOffset 10

client .ssh/config

ForwardX11 yes
ForwardX11Trusted yes

display test command:

> ssh -X me@server 'echo $DISPLAY'
localhost:10.0

command on the client:

ssh -vvv -X me@server "/usr/bin/gedit"

command output

OpenSSH_8.3p1, OpenSSL 1.1.1i FIPS  8 Dec 2020
debug1: Reading configuration data /home/folio/.ssh/config
debug1: Reading configuration data /etc/ssh/ssh_config
debug3: /etc/ssh/ssh_config line 54: Including file /etc/ssh/ssh_config.d/50-redhat.conf depth 0
debug1: Reading configuration data /etc/ssh/ssh_config.d/50-redhat.conf
debug2: checking match for 'final all' host 10.0.0.5 originally 10.0.0.5
debug3: /etc/ssh/ssh_config.d/50-redhat.conf line 3: not matched 'final'
debug2: match not found
debug3: /etc/ssh/ssh_config.d/50-redhat.conf line 5: Including file /etc/crypto-policies/back-ends/openssh.config depth 1 (parse only)
debug1: Reading configuration data /etc/crypto-policies/back-ends/openssh.config
debug3: gss kex names ok: [gss-curve25519-sha256-,gss-nistp256-sha256-,gss-group14-sha256-,gss-group16-sha512-,gss-gex-sha1-,gss-group14-sha1-,gss-group1-sha1-]
debug3: kex names ok: [curve25519-sha256,[email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha>
debug1: configuration requests final Match pass
debug2: resolve_canonicalize: hostname 10.0.0.5 is address
debug1: re-parsing configuration
debug1: Reading configuration data /home/folio/.ssh/config
debug1: Reading configuration data /etc/ssh/ssh_config
debug3: /etc/ssh/ssh_config line 54: Including file /etc/ssh/ssh_config.d/50-redhat.conf depth 0
debug1: Reading configuration data /etc/ssh/ssh_config.d/50-redhat.conf
debug2: checking match for 'final all' host 10.0.0.5 originally 10.0.0.5
debug3: /etc/ssh/ssh_config.d/50-redhat.conf line 3: matched 'final'
debug2: match found
debug3: /etc/ssh/ssh_config.d/50-redhat.conf line 5: Including file /etc/crypto-policies/back-ends/openssh.config depth 1
debug1: Reading configuration data /etc/crypto-policies/back-ends/openssh.config
debug3: gss kex names ok: [gss-curve25519-sha256-,gss-nistp256-sha256-,gss-group14-sha256-,gss-group16-sha512-,gss-gex-sha1-,gss-group14-sha1-,gss-group1-sha1-]
debug3: kex names ok: [curve25519-sha256,[email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha>
debug2: ssh_connect_direct
debug1: Connecting to 10.0.0.5 [10.0.0.5] port 22.
debug1: Connection established.
debug1: identity file /home/folio/.ssh/id_rsa type 0
debug1: identity file /home/folio/.ssh/id_rsa-cert type -1
debug1: identity file /home/folio/.ssh/id_dsa type -1
debug1: identity file /home/folio/.ssh/id_dsa-cert type -1
debug1: identity file /home/folio/.ssh/id_ecdsa type -1
debug1: identity file /home/folio/.ssh/id_ecdsa-cert type -1
debug1: identity file /home/folio/.ssh/id_ecdsa_sk type -1
debug1: identity file /home/folio/.ssh/id_ecdsa_sk-cert type -1
debug1: identity file /home/folio/.ssh/id_ed25519 type -1
debug1: identity file /home/folio/.ssh/id_ed25519-cert type -1
debug1: identity file /home/folio/.ssh/id_ed25519_sk type -1
debug1: identity file /home/folio/.ssh/id_ed25519_sk-cert type -1
debug1: identity file /home/folio/.ssh/id_xmss type -1
debug1: identity file /home/folio/.ssh/id_xmss-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_8.3
debug1: Remote protocol version 2.0, remote software version OpenSSH_8.4
debug1: match: OpenSSH_8.4 pat OpenSSH* compat 0x04000000
debug2: fd 5 setting O_NONBLOCK
debug1: Authenticating to 10.0.0.5:22 as 'bhawkins'
debug3: hostkeys_foreach: reading file "/home/folio/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file /home/folio/.ssh/known_hosts:8
debug3: load_hostkeys: loaded 1 keys from 10.0.0.5
debug3: order_hostkeyalgs: prefer hostkeyalgs: [email protected],[email protected],ecdsa-sha2-nistp521-cert-v01@op>
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,[email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sh>
debug2: host key algorithms: [email protected],[email protected],[email protected],ecdsa-sh>
debug2: ciphers ctos: [email protected],[email protected],aes256-ctr,aes256-cbc,[email protected],aes128-ctr,aes128-cbc
debug2: ciphers stoc: [email protected],[email protected],aes256-ctr,aes256-cbc,[email protected],aes128-ctr,aes128-cbc
debug2: MACs ctos: [email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha1,umac-1>
debug2: MACs stoc: [email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha1,umac-1>
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-sh>
debug2: host key algorithms: rsa-sha2-512,rsa-sha2-256,ssh-rsa,ecdsa-sha2-nistp256,ssh-ed25519
debug2: ciphers ctos: [email protected],[email protected],aes256-ctr,[email protected],aes128-ctr
debug2: ciphers stoc: [email protected],[email protected],aes256-ctr,[email protected],aes128-ctr
debug2: MACs ctos: [email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha1,umac-1>
debug2: MACs stoc: [email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha1,umac-1>
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: curve25519-sha256
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
debug1: kex: curve25519-sha256 need=32 dh_need=32
debug1: kex: curve25519-sha256 need=32 dh_need=32
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:+V6XgNHheNBHFL99Ifdm4uNjzraZZBADjytLzbYOueU
debug3: hostkeys_foreach: reading file "/home/folio/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file /home/folio/.ssh/known_hosts:8
debug3: load_hostkeys: loaded 1 keys from 10.0.0.5
debug1: Host '10.0.0.5' is known and matches the ECDSA host key.
debug1: Found key in /home/folio/.ssh/known_hosts:8
debug3: send packet: type 21
debug2: set_newkeys: mode 1
debug1: rekey out after 4294967296 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 4294967296 blocks
debug1: Will attempt key: /home/folio/.ssh/id_rsa RSA SHA256:59270Q20FVNukCiDfYNCBRFOOYYK/bvUTkL+H9sT518 agent
debug1: Will attempt key: /home/folio/.ssh/id_dsa 
debug1: Will attempt key: /home/folio/.ssh/id_ecdsa 
debug1: Will attempt key: /home/folio/.ssh/id_ecdsa_sk 
debug1: Will attempt key: /home/folio/.ssh/id_ed25519 
debug1: Will attempt key: /home/folio/.ssh/id_ed25519_sk 
debug1: Will attempt key: /home/folio/.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=<ssh-ed25519,[email protected],ssh-rsa,rsa-sha2-256,rsa-sha2-512,ssh-dss,ecdsa-sha2-nistp256,ecdsa-sha2-nis>
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 gssapi-with-mic,publickey,keyboard-interactive,password
debug3: authmethod_lookup gssapi-with-mic
debug3: remaining preferred: publickey,keyboard-interactive,password
debug3: authmethod_is_enabled gssapi-with-mic
debug1: Next authentication method: gssapi-with-mic
debug1: Unspecified GSS failure.  Minor code may provide more information
No Kerberos credentials available (default cache: KCM:)


debug1: Unspecified GSS failure.  Minor code may provide more information
No Kerberos credentials available (default cache: KCM:)


debug2: we did not send a packet, disable method
debug3: authmethod_lookup publickey
debug3: remaining preferred: keyboard-interactive,password
debug3: authmethod_is_enabled publickey
debug1: Next authentication method: publickey
debug1: Offering public key: /home/folio/.ssh/id_rsa RSA SHA256:59270Q20FVNukCiDfYNCBRFOOYYK/bvUTkL+H9sT518 agent
debug3: send packet: type 50
debug2: we sent a publickey packet, wait for reply
debug3: receive packet: type 60
debug1: Server accepts key: /home/folio/.ssh/id_rsa RSA SHA256:59270Q20FVNukCiDfYNCBRFOOYYK/bvUTkL+H9sT518 agent
debug3: sign_and_send_pubkey: RSA SHA256:59270Q20FVNukCiDfYNCBRFOOYYK/bvUTkL+H9sT518
debug3: sign_and_send_pubkey: signing using rsa-sha2-256 SHA256:59270Q20FVNukCiDfYNCBRFOOYYK/bvUTkL+H9sT518
debug3: send packet: type 50
debug3: receive packet: type 52
debug1: Authentication succeeded (publickey).
Authenticated to 10.0.0.5 ([10.0.0.5]:22).
debug2: fd 7 setting O_NONBLOCK
debug3: fd 8 is O_NONBLOCK
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 4
debug1: Remote: /home/bhawkins/.ssh/authorized_keys:1: key options: agent-forwarding port-forwarding pty user-rc x11-forwarding
debug3: receive packet: type 4
debug1: Remote: /home/bhawkins/.ssh/authorized_keys:1: key options: agent-forwarding port-forwarding pty user-rc x11-forwarding
debug3: receive packet: type 91
debug2: channel_input_open_confirmation: channel 0: callback start
debug2: x11_get_proto: /usr/bin/xauth  list :0 2>/dev/null
debug1: Requesting X11 forwarding with authentication spoofing.
debug2: channel 0: request x11-req confirm 1
debug3: send packet: type 98
debug2: fd 5 setting TCP_NODELAY
debug3: ssh_packet_set_tos: set IP_TOS 0x48
debug2: client_session2_setup: id 0
debug1: Sending env XMODIFIERS = @im=ibus
debug2: channel 0: request env confirm 0
debug3: send packet: type 98
debug1: Sending env LANG = fr_FR.UTF-8
debug2: channel 0: request env confirm 0
debug3: send packet: type 98
debug1: Sending command: /usr/bin/gedit
debug2: channel 0: request exec 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: X11 forwarding 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: exec request accepted on channel 0
debug3: receive packet: type 96
debug2: channel 0: rcvd eof
debug2: channel 0: output open -> drain
debug2: channel 0: obuf empty
debug2: channel 0: chan_shutdown_write (i0 o1 sock -1 wfd 7 efd 8 [write])
debug2: channel 0: output drain -> closed
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: chan_shutdown_read (i0 o3 sock -1 wfd 6 efd 8 [write])
debug2: channel 0: input open -> 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 e[write]/0 fd -1/-1/8 sock -1 cc -1)

debug3: send packet: type 1
debug3: fd 1 is not O_NONBLOCK
debug1: fd 2 clearing O_NONBLOCK
Transferred: sent 3872, received 3272 bytes, in 0.2 seconds
Bytes per second: sent 18702.6, received 15804.4
debug1: Exit status 0
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  • ssh -X me@server "echo $DISPLAY" This is going to echo your local DISPLAY value, not the remote value. Try ssh -X me@server 'echo $DISPLAY'.
    – Kenster
    Commented Mar 27, 2021 at 19:12
  • @Kenster thanks! Updating my post accordingly. Commented Mar 27, 2021 at 19:27
  • Is an instance of gedit already running on the remote host? if so, it may be necessary to force the new instance to run in standalone mode. See for example How to force gedit to run each window in a separate process? Commented Mar 27, 2021 at 20:03
  • No instances of geditare running on the server when the ssh command is executed (the command will leave an instance on the server, so I kill it directly from another ssh connection before trying again). Commented Mar 27, 2021 at 20:39
  • What's the point of your SSH client configuration if you then you explicitly use -X which rescinds ForwardX11Trusted yes. Does any other X11 app while tunnel work as expected, eg. xlock?
    – Jiri B
    Commented Mar 29, 2021 at 11:56

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