GNU bug report logs - #19702
25.0.50; Tramp with ssh not working with openssh 6.7 while worked with 6.6

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Filipp Gunbin <fgunbin <at> fastmail.fm>
To: bug-gnu-emacs <at> gnu.org
Subject: 25.0.50;
 Tramp with ssh not working with openssh 6.7 while worked with 6.6
Date: Tue, 27 Jan 2015 17:41:26 +0300

I've recently upgraded openssh to 6.7 on MacOS X (from MacPorts) and ssh
in Tramp stopped working.  Logs are below.  Activating openssh 6.6
brings back the working state.

The file being opened is /ssh:root@<myhost>:/opt/ as can be seen in the
logs.

Filipp


*Messages*:

Tramp: Opening connection for root@<myhost> using ssh...
Tramp: Sending command `exec ssh -l root  -o ControlPath=/var/folders/yb/0cdss5q52d1848_2th2kp_740000gn/T/tramp.587MEg.%r@%h:%p -o ControlMaster=auto -o ControlPersist=no -e none <myhost>'
Tramp: Waiting for prompts from remote shell...
Tramp: Sending password
Tramp: Waiting for prompts from remote shell...failed
Tramp: Opening connection for root@<myhost> using ssh...failed
find-file--read-only: /ssh:root@<myhost>:/opt/ does not exist

Tramp log buffer:

;; GNU Emacs: 25.0.50.1 Tramp: 2.2.11-pre -*- mode: outline; -*-
17:34:12.309869 tramp-get-file-exists-command (5) # Finding command to check if file exists
17:34:12.309984 tramp-get-test-command (5) # Finding a suitable `test' command
17:34:12.310350 tramp-maybe-open-connection (3) # Opening connection for root@<myhost> using ssh...
17:34:12.313477 tramp-maybe-open-connection (6) # /bin/sh -i
17:34:12.316213 tramp-wait-for-regexp (6) # 
#$ 
17:34:12.318521 tramp-maybe-open-connection (3) # Sending command `exec ssh -l root  -o ControlPath=/var/folders/yb/0cdss5q52d1848_2th2kp_740000gn/T/tramp.587ZOm.%r@%h:%p -o ControlMaster=auto -o ControlPersist=no -e none <myhost>'
17:34:12.318598 tramp-send-command (6) # exec ssh -l root  -o ControlPath=/var/folders/yb/0cdss5q52d1848_2th2kp_740000gn/T/tramp.587ZOm.%r@%h:%p -o ControlMaster=auto -o ControlPersist=no -e none <myhost>
17:34:12.318933 tramp-process-actions (3) # Waiting for prompts from remote shell...
17:34:12.767357 tramp-process-one-action (5) # Looking for regexp "\(.*ogin\( .*\)?: *\)\'" from remote shell
17:34:12.767533 tramp-process-one-action (5) # Looking for regexp "\(^.*\(\(?:adgangskode\|contrase\(?:\(?:ny\|ñ\)a\)\|geslo\|h\(?:\(?:asł\|esl\)o\)\|iphasiwedi\|jelszó\|l\(?:ozinka\|ösenord\)\|m\(?:ot de passe\|ật khẩu\)\|pa\(?:rola\|s\(?:ahitza\|s\(?: phrase\|ord\|phrase\|wor[dt]\)\|vorto\)\)\|s\(?:alasana\|enha\|laptažodis\)\|wachtwoord\|лозинка\|пароль\|ססמה\|كلمة السر\|गुप्तशब्द\|शब्दकूट\|গুপ্তশব্দ\|পাসওয়ার্ড\|ਪਾਸਵਰਡ\|પાસવર્ડ\|ପ୍ରବେଶ ସଙ୍କେତ\|கடவுச்சொல்\|సంకేతపదము\|ಗುಪ್ತಪದ\|അടയാളവാക്ക്\|රහස්පදය\|ពាក្យសម្ងាត់\|パスワード\|密[码碼]\|암호\)\).*:.? *\)\'" from remote shell
17:34:12.767679 tramp-process-one-action (5) # Call `tramp-action-password'
17:34:12.768007 tramp-action-password (3) # Sending password
17:34:15.925594 tramp-process-one-action (5) # Looking for regexp "\(^.*\(Connection \(?:\(?:clo\|refu\)sed\)\|Host key verification failed\.\|Login \(?:[Ii]ncorrect\)\|N\(?:ame or service not known\|o supported authentication methods left to try!\)\|Permission denied\|\(?:Sorry, try again\|Timeout, server not responding\)\.\).*\|^.*\(Received signal [0-9]+\).*\)\'" from remote shell
17:34:15.925719 tramp-process-one-action (5) # Looking for regexp "\(^[^#$%>
]*[#$%>] *\)\'" from remote shell
17:34:15.925839 tramp-process-one-action (5) # Looking for regexp "\(\(?:^\|.\)[^]#$%>
]*#?[]#$%>] *\(.\[[0-9;]*[a-zA-Z] *\)*\)\'" from remote shell
17:34:15.925920 tramp-process-one-action (5) # Looking for regexp "\(\(Are you sure you want to continue connecting (yes/no)\?\)\s-*\)\'" from remote shell
17:34:15.925982 tramp-process-one-action (5) # Looking for regexp "\(\(\(?:Store key in cache\? (y/\|Update cached key\? (y/n, Return cancels connectio\)n)\)\s-*\)\'" from remote shell
17:34:15.926050 tramp-process-one-action (5) # Looking for regexp "\(\(TERM = (.*)\|Terminal type\? \[.*\]\)\s-*\)\'" from remote shell
17:34:15.926103 tramp-process-one-action (5) # Looking for regexp "\(\)\'" from remote shell
17:34:15.926154 tramp-process-one-action (5) # Call `tramp-action-process-alive'
17:34:15.926305 tramp-process-one-action (5) # Looking for regexp "\(.*ogin\( .*\)?: *\)\'" from remote shell
17:34:15.926395 tramp-process-one-action (5) # Looking for regexp "\(^.*\(\(?:adgangskode\|contrase\(?:\(?:ny\|ñ\)a\)\|geslo\|h\(?:\(?:asł\|esl\)o\)\|iphasiwedi\|jelszó\|l\(?:ozinka\|ösenord\)\|m\(?:ot de passe\|ật khẩu\)\|pa\(?:rola\|s\(?:ahitza\|s\(?: phrase\|ord\|phrase\|wor[dt]\)\|vorto\)\)\|s\(?:alasana\|enha\|laptažodis\)\|wachtwoord\|лозинка\|пароль\|ססמה\|كلمة السر\|गुप्तशब्द\|शब्दकूट\|গুপ্তশব্দ\|পাসওয়ার্ড\|ਪਾਸਵਰਡ\|પાસવર્ડ\|ପ୍ରବେଶ ସଙ୍କେତ\|கடவுச்சொல்\|సంకేతపదము\|ಗುಪ್ತಪದ\|അടയാളവാക്ക്\|රහස්පදය\|ពាក្យសម្ងាត់\|パスワード\|密[码碼]\|암호\)\).*:.? *\)\'" from remote shell
17:34:15.926521 tramp-process-one-action (5) # Looking for regexp "\(^.*\(Connection \(?:\(?:clo\|refu\)sed\)\|Host key verification failed\.\|Login \(?:[Ii]ncorrect\)\|N\(?:ame or service not known\|o supported authentication methods left to try!\)\|Permission denied\|\(?:Sorry, try again\|Timeout, server not responding\)\.\).*\|^.*\(Received signal [0-9]+\).*\)\'" from remote shell
17:34:15.926588 tramp-process-one-action (5) # Looking for regexp "\(^[^#$%>
]*[#$%>] *\)\'" from remote shell
17:34:15.926643 tramp-process-one-action (5) # Looking for regexp "\(\(?:^\|.\)[^]#$%>
]*#?[]#$%>] *\(.\[[0-9;]*[a-zA-Z] *\)*\)\'" from remote shell
17:34:15.926693 tramp-process-one-action (5) # Looking for regexp "\(\(Are you sure you want to continue connecting (yes/no)\?\)\s-*\)\'" from remote shell
17:34:15.926746 tramp-process-one-action (5) # Looking for regexp "\(\(\(?:Store key in cache\? (y/\|Update cached key\? (y/n, Return cancels connectio\)n)\)\s-*\)\'" from remote shell
17:34:15.926794 tramp-process-one-action (5) # Looking for regexp "\(\(TERM = (.*)\|Terminal type\? \[.*\]\)\s-*\)\'" from remote shell
17:34:15.926841 tramp-process-one-action (5) # Looking for regexp "\(\)\'" from remote shell
17:34:15.926883 tramp-process-one-action (5) # Call `tramp-action-process-alive'
17:34:15.931202 tramp-process-one-action (5) # Looking for regexp "\(.*ogin\( .*\)?: *\)\'" from remote shell
17:34:15.932269 tramp-process-one-action (5) # Looking for regexp "\(^.*\(\(?:adgangskode\|contrase\(?:\(?:ny\|ñ\)a\)\|geslo\|h\(?:\(?:asł\|esl\)o\)\|iphasiwedi\|jelszó\|l\(?:ozinka\|ösenord\)\|m\(?:ot de passe\|ật khẩu\)\|pa\(?:rola\|s\(?:ahitza\|s\(?: phrase\|ord\|phrase\|wor[dt]\)\|vorto\)\)\|s\(?:alasana\|enha\|laptažodis\)\|wachtwoord\|лозинка\|пароль\|ססמה\|كلمة السر\|गुप्तशब्द\|शब्दकूट\|গুপ্তশব্দ\|পাসওয়ার্ড\|ਪਾਸਵਰਡ\|પાસવર્ડ\|ପ୍ରବେଶ ସଙ୍କେତ\|கடவுச்சொல்\|సంకేతపదము\|ಗುಪ್ತಪದ\|അടയാളവാക്ക്\|රහස්පදය\|ពាក្យសម្ងាត់\|パスワード\|密[码碼]\|암호\)\).*:.? *\)\'" from remote shell
17:34:15.932625 tramp-process-one-action (5) # Looking for regexp "\(^.*\(Connection \(?:\(?:clo\|refu\)sed\)\|Host key verification failed\.\|Login \(?:[Ii]ncorrect\)\|N\(?:ame or service not known\|o supported authentication methods left to try!\)\|Permission denied\|\(?:Sorry, try again\|Timeout, server not responding\)\.\).*\|^.*\(Received signal [0-9]+\).*\)\'" from remote shell
17:34:15.932762 tramp-process-one-action (5) # Looking for regexp "\(^[^#$%>
]*[#$%>] *\)\'" from remote shell
17:34:15.932856 tramp-process-one-action (5) # Looking for regexp "\(\(?:^\|.\)[^]#$%>
]*#?[]#$%>] *\(.\[[0-9;]*[a-zA-Z] *\)*\)\'" from remote shell
17:34:15.932960 tramp-process-one-action (5) # Looking for regexp "\(\(Are you sure you want to continue connecting (yes/no)\?\)\s-*\)\'" from remote shell
17:34:15.932995 tramp-process-one-action (5) # Looking for regexp "\(\(\(?:Store key in cache\? (y/\|Update cached key\? (y/n, Return cancels connectio\)n)\)\s-*\)\'" from remote shell
17:34:15.933037 tramp-process-one-action (5) # Looking for regexp "\(\(TERM = (.*)\|Terminal type\? \[.*\]\)\s-*\)\'" from remote shell
17:34:15.933082 tramp-process-one-action (5) # Looking for regexp "\(\)\'" from remote shell
17:34:15.933123 tramp-process-one-action (5) # Call `tramp-action-process-alive'
17:34:15.933185 tramp-process-actions (6) # 
root@<myhost>'s password: 
unix_listener: "/var/folders/yb/0cdss5q52d1848_2th2kp_740000gn/T/tramp.587ZOm.root@<myhost>:22.rIZDlnMe9NViEUbt" too long for Unix domain socket.
17:34:15.933268 tramp-process-sentinel (5) # Sentinel called: `#<process *tramp/ssh root@<myhost>*>' `exited abnormally with code 255
'
17:34:15.934827 tramp-process-actions (1) # File error: Tramp failed to connect.  If this happens repeatedly, try
    `M-x tramp-cleanup-this-connection'
17:34:15.935280 tramp-maybe-open-connection (3) # Opening connection for root@<myhost> using ssh...failed
17:34:15.935420 tramp-file-name-handler (1) # Suppress received in operation (file-exists-p /ssh:root@<myhost>:/opt/)
17:34:15.936333 tramp-get-file-exists-command (5) # Finding command to check if file exists
17:34:15.936414 tramp-get-test-command (5) # Finding a suitable `test' command
17:34:15.936502 tramp-file-name-handler (1) # Suppress received in operation (file-exists-p /ssh:root@<myhost>:/opt/)

Message #8 received at 19702 <at> debbugs.gnu.org (full text, mbox):

From: Michael Albinus <michael.albinus <at> gmx.de>
To: Filipp Gunbin <fgunbin <at> fastmail.fm>
Cc: 19702 <at> debbugs.gnu.org
Subject: Re: bug#19702: 25.0.50;
 Tramp with ssh not working with openssh 6.7 while worked with 6.6
Date: Tue, 27 Jan 2015 17:06:33 +0100

Filipp Gunbin <fgunbin <at> fastmail.fm> writes:

Hi Filipp,

> I've recently upgraded openssh to 6.7 on MacOS X (from MacPorts) and ssh
> in Tramp stopped working.  Logs are below.  Activating openssh 6.6
> brings back the working state.
>
> Tramp log buffer:
>
> 17:34:12.318598 tramp-send-command (6) # exec ssh -l root -o
> ControlPath=/var/folders/yb/0cdss5q52d1848_2th2kp_740000gn/T/tramp.587ZOm.%r@%h:%p
> -o ControlMaster=auto -o ControlPersist=no -e none <myhost>
> 17:34:15.933185 tramp-process-actions (6) # 
> root@<myhost>'s password: 
> unix_listener: "/var/folders/yb/0cdss5q52d1848_2th2kp_740000gn/T/tramp.587ZOm.root@<myhost>:22.rIZDlnMe9NViEUbt" too long for Unix domain socket.

You see the error message: the file name of the socket is too long. What
has changed wrt openssh 6.6? Has the template Tramp uses being expanded
differently? And why is there the suffix ".rIZDlnMe9NViEUbt" after the
port number?

As workaround, you could change the template Tramp uses in
`tramp-ssh-controlmaster-options', or you could disable those options
via `tramp-use-ssh-controlmaster-options'.

> Filipp

Best regards, Michael.

Message #11 received at 19702 <at> debbugs.gnu.org (full text, mbox):

From: Filipp Gunbin <fgunbin <at> fastmail.fm>
To: Michael Albinus <michael.albinus <at> gmx.de>
Cc: 19702 <at> debbugs.gnu.org
Subject: Re: bug#19702: 25.0.50;
 Tramp with ssh not working with openssh 6.7 while worked with 6.6
Date: Tue, 27 Jan 2015 20:45:39 +0300

Michael,

On 27/01/2015 17:06 +0100, Michael Albinus wrote:

> Filipp Gunbin <fgunbin <at> fastmail.fm> writes:
>
> Hi Filipp,
>
>> I've recently upgraded openssh to 6.7 on MacOS X (from MacPorts) and ssh
>> in Tramp stopped working.  Logs are below.  Activating openssh 6.6
>> brings back the working state.
>>
>> Tramp log buffer:
>>
>> 17:34:12.318598 tramp-send-command (6) # exec ssh -l root -o
>> ControlPath=/var/folders/yb/0cdss5q52d1848_2th2kp_740000gn/T/tramp.587ZOm.%r@%h:%p
>> -o ControlMaster=auto -o ControlPersist=no -e none <myhost>
>> 17:34:15.933185 tramp-process-actions (6) # 
>> root@<myhost>'s password: 
>> unix_listener:
>> "/var/folders/yb/0cdss5q52d1848_2th2kp_740000gn/T/tramp.587ZOm.root@<myhost>:22.rIZDlnMe9NViEUbt"
>> too long for Unix domain socket.
>
> You see the error message: the file name of the socket is too long. What
> has changed wrt openssh 6.6? Has the template Tramp uses being expanded
> differently? And why is there the suffix ".rIZDlnMe9NViEUbt" after the
> port number?

Release notes for openssh 6.7 [1] tell:

 * ssh(1): Add a %C escape sequence for LocalCommand and ControlPath
   that expands to a unique identifer based on a hash of the tuple of
   (local host, remote user, hostname, port). Helps avoid exceeding
   miserly pathname limits for Unix domain sockets in multiplexing
   control paths; bz#2220

I changed `tramp-ssh-controlmaster-options' as follows:

(setq tramp-ssh-controlmaster-options "-o ControlPath=%%C -o
ControlMaster=auto -o ControlPersist=no")

And it started working.

BTW, "name is too long" errors also occurred with 6.6, too.  And the
template was expanded similarly, I checked that.

The original value contained "%t.%%r@%%h:%%p".  %r, %h and %p could be
substituted by %C as the above doc says.  But what about %t?  It's a
temporary file as I understand and is substituted by Tramp, not by ssh.
Is it critical that it should be present in the resulting file name?

Filipp

[1] http://www.openssh.com/txt/release-6.7

Message #14 received at 19702 <at> debbugs.gnu.org (full text, mbox):

From: Michael Albinus <michael.albinus <at> gmx.de>
To: Filipp Gunbin <fgunbin <at> fastmail.fm>
Cc: 19702 <at> debbugs.gnu.org
Subject: Re: bug#19702: 25.0.50;
 Tramp with ssh not working with openssh 6.7 while worked with 6.6
Date: Mon, 02 Feb 2015 10:20:34 +0100

Filipp Gunbin <fgunbin <at> fastmail.fm> writes:

> Michael,

Hi Filipp,

> Release notes for openssh 6.7 [1] tell:
>
>  * ssh(1): Add a %C escape sequence for LocalCommand and ControlPath
>    that expands to a unique identifer based on a hash of the tuple of
>    (local host, remote user, hostname, port). Helps avoid exceeding
>    miserly pathname limits for Unix domain sockets in multiplexing
>    control paths; bz#2220
>
> I changed `tramp-ssh-controlmaster-options' as follows:
>
> (setq tramp-ssh-controlmaster-options "-o ControlPath=%%C -o
> ControlMaster=auto -o ControlPersist=no")
>
> And it started working.

I have committed a patch to the emacs-24 branch which uses %C in
ControlPath if possible. Could you, pls, check? I have no openssh 6.7
installed, so I cannot test myself.

> The original value contained "%t.%%r@%%h:%%p".  %r, %h and %p could be
> substituted by %C as the above doc says.  But what about %t?  It's a
> temporary file as I understand and is substituted by Tramp, not by ssh.
> Is it critical that it should be present in the resulting file name?

In the past there were problems when Tramp used the same ControlPath
like ssh connections started/stopped outside Emacs. That's why Tramp
uses its own one.

> Filipp

Best regards, Michael.

Message #17 received at 19702 <at> debbugs.gnu.org (full text, mbox):

From: Filipp Gunbin <fgunbin <at> fastmail.fm>
To: Michael Albinus <michael.albinus <at> gmx.de>
Cc: 19702 <at> debbugs.gnu.org
Subject: Re: bug#19702: 25.0.50;
 Tramp with ssh not working with openssh 6.7 while worked with 6.6
Date: Mon, 02 Feb 2015 17:09:25 +0300

Michael,

On 02/02/2015 10:20 +0100, Michael Albinus wrote:

> I have committed a patch to the emacs-24 branch which uses %C in
> ControlPath if possible. Could you, pls, check? I have no openssh 6.7
> installed, so I cannot test myself.

Thanks, but it didn't work:

17:02:55.588956 tramp-send-command (6) # exec ssh -l root  -o ControlMaster=auto -o ControlPath=/var/folders/yb/0cdss5q52d1848_2th2kp_740000gn/T/tramp.54213PO4.%C -o ControlPersist=no -e none <myhost>
17:02:55.606731 tramp-process-one-action (5) # Call `tramp-action-process-alive'
17:02:55.606825 tramp-process-actions (6) #
ControlPath too long^
17:02:55.606932 tramp-process-sentinel (5) # Sentinel called: `#<process *tramp/ssh root@<myhost>*>' `exited abnormally with code 255'
17:02:55.610263 tramp-process-actions (1) # File error: Tramp failed to connect.  If this happens repeatedly, try
`M-x tramp-cleanup-this-connection'
17:02:58.732912 tramp-maybe-open-connection (3) # Opening connection for root@<myhost> using ssh...failed

>> The original value contained "%t.%%r@%%h:%%p".  %r, %h and %p could be
>> substituted by %C as the above doc says.  But what about %t?  It's a
>> temporary file as I understand and is substituted by Tramp, not by ssh.
>> Is it critical that it should be present in the resulting file name?
>
> In the past there were problems when Tramp used the same ControlPath
> like ssh connections started/stopped outside Emacs. That's why Tramp
> uses its own one.

Aren't values produced by %C supposed to be unique?  Then probably the
temporary file isn't needed.

Filipp

Message #20 received at 19702 <at> debbugs.gnu.org (full text, mbox):

From: Michael Albinus <michael.albinus <at> gmx.de>
To: Filipp Gunbin <fgunbin <at> fastmail.fm>
Cc: 19702 <at> debbugs.gnu.org
Subject: Re: bug#19702: 25.0.50;
 Tramp with ssh not working with openssh 6.7 while worked with 6.6
Date: Mon, 02 Feb 2015 16:16:27 +0100

Filipp Gunbin <fgunbin <at> fastmail.fm> writes:

> Michael,

Hi Filipp,

>> I have committed a patch to the emacs-24 branch which uses %C in
>> ControlPath if possible. Could you, pls, check? I have no openssh 6.7
>> installed, so I cannot test myself.
>
> Thanks, but it didn't work:
>
> 17:02:55.588956 tramp-send-command (6) # exec ssh -l root -o
> ControlMaster=auto -o
> ControlPath=/var/folders/yb/0cdss5q52d1848_2th2kp_740000gn/T/tramp.54213PO4.%C
> -o ControlPersist=no -e none <myhost>

Is the ControlPath still too long? What happens, if you call the command
directly in the shell?

# ssh -l root -o ControlMaster=auto -o ControlPath=/var/folders/yb/0cdss5q52d1848_2th2kp_740000gn/T/tramp.54213PO4.%C -o ControlPersist=no -e none <myhost>

And what happens if you call

# ssh -l root -o ControlMaster=auto -o ControlPath=tramp.54213PO4.%C -o ControlPersist=no -e none <myhost>

> Aren't values produced by %C supposed to be unique?  Then probably the
> temporary file isn't needed.

No, they are unique for the triple (user, host, port) only. This triple
could be used also outside Emacs for an ssh connection.

> Filipp

Best regards, Michael.

Message #23 received at 19702 <at> debbugs.gnu.org (full text, mbox):

From: Filipp Gunbin <fgunbin <at> fastmail.fm>
To: Michael Albinus <michael.albinus <at> gmx.de>
Cc: 19702 <at> debbugs.gnu.org
Subject: Re: bug#19702: 25.0.50;
 Tramp with ssh not working with openssh 6.7 while worked with 6.6
Date: Mon, 02 Feb 2015 20:53:58 +0300

On 02/02/2015 16:16 +0100, Michael Albinus wrote:

> Filipp Gunbin <fgunbin <at> fastmail.fm> writes:
>>
>> Thanks, but it didn't work:
>>
>> 17:02:55.588956 tramp-send-command (6) # exec ssh -l root -o
>> ControlMaster=auto -o
>> ControlPath=/var/folders/yb/0cdss5q52d1848_2th2kp_740000gn/T/tramp.54213PO4.%C
>> -o ControlPersist=no -e none <myhost>
>
> Is the ControlPath still too long? What happens, if you call the command
> directly in the shell?
>
> # ssh -l root -o ControlMaster=auto -o
> ControlPath=/var/folders/yb/0cdss5q52d1848_2th2kp_740000gn/T/tramp.54213PO4.%C
> -o ControlPersist=no -e none <myhost>
>
> And what happens if you call
>
> # ssh -l root -o ControlMaster=auto -o ControlPath=tramp.54213PO4.%C
> -o ControlPersist=no -e none <myhost>

$ ssh -l root -o ControlMaster=auto -o ControlPath='/var/folders/yb/0cdss5q52d1848_2th2kp_740000gn/T/tramp.54213PO4.%C' -o ControlPersist=no -e none <myhost>
ControlPath too long

$ ssh -l root -o ControlMaster=auto -o ControlPath='tramp.54213PO4.%C' -o ControlPersist=no -e none <myhost>
root@<myhost>'s password: 
... <asks for password>
Welcome to Ubuntu 12.04.4 LTS (GNU/Linux 3.11.0-15-generic x86_64)
...

>> Aren't values produced by %C supposed to be unique?  Then probably the
>> temporary file isn't needed.
>
> No, they are unique for the triple (user, host, port) only. This triple
> could be used also outside Emacs for an ssh connection.

But how does openssh prevent collisions between separate running
instances of itself, then?

Filipp

Message #26 received at 19702 <at> debbugs.gnu.org (full text, mbox):

From: Michael Albinus <michael.albinus <at> gmx.de>
To: Filipp Gunbin <fgunbin <at> fastmail.fm>
Cc: 19702 <at> debbugs.gnu.org
Subject: Re: bug#19702: 25.0.50;
 Tramp with ssh not working with openssh 6.7 while worked with 6.6
Date: Tue, 03 Feb 2015 10:45:16 +0100

Filipp Gunbin <fgunbin <at> fastmail.fm> writes:

> $ ssh -l root -o ControlMaster=auto -o ControlPath='tramp.54213PO4.%C'
> -o ControlPersist=no -e none <myhost>
> root@<myhost>'s password: 
> ... <asks for password>
> Welcome to Ubuntu 12.04.4 LTS (GNU/Linux 3.11.0-15-generic x86_64)
> ...

I've changed it like this. Could you, please, test again?

> Filipp

Best regards, Michael.

Message #29 received at 19702 <at> debbugs.gnu.org (full text, mbox):

From: Filipp Gunbin <fgunbin <at> fastmail.fm>
To: Michael Albinus <michael.albinus <at> gmx.de>
Cc: 19702 <at> debbugs.gnu.org
Subject: Re: bug#19702: 25.0.50;
 Tramp with ssh not working with openssh 6.7 while worked with 6.6
Date: Tue, 03 Feb 2015 15:31:57 +0300

On 03/02/2015 10:45 +0100, Michael Albinus wrote:

> Filipp Gunbin <fgunbin <at> fastmail.fm> writes:
>
>> $ ssh -l root -o ControlMaster=auto -o ControlPath='tramp.54213PO4.%C'
>> -o ControlPersist=no -e none <myhost>
>> root@<myhost>'s password: 
>> ... <asks for password>
>> Welcome to Ubuntu 12.04.4 LTS (GNU/Linux 3.11.0-15-generic x86_64)
>> ...
>
> I've changed it like this. Could you, please, test again?

It's ok now, thanks!

Message #34 received at 19702-done <at> debbugs.gnu.org (full text, mbox):

From: Michael Albinus <michael.albinus <at> gmx.de>
To: Filipp Gunbin <fgunbin <at> fastmail.fm>
Cc: 19702-done <at> debbugs.gnu.org
Subject: Re: bug#19702: 25.0.50;
 Tramp with ssh not working with openssh 6.7 while worked with 6.6
Date: Tue, 03 Feb 2015 13:43:40 +0100

Version: 24.5

Filipp Gunbin <fgunbin <at> fastmail.fm> writes:

>> I've changed it like this. Could you, please, test again?
>
> It's ok now, thanks!

Thanks for testing, I'm closing the bug.

Best regards, Michael.

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