I think this is very basic question in using tramp, but it doesn't work for me.
I have my ~/.ssh/config file that points to my amazon ec2 machine
Host amazon
Hostname xxxx.amazonaws.com
Port yyy
User me
IdentityFile ~/.ssh/ubuntu
ForwardAgent yes
I can easily do ssh amazon from my terminal and I go to amazon ec2 (so my config is right), but in emacs
I do:
C-x C-f /ssh1:amazon:
I always get this error
In Aquamacs:
Process *tramp/ssh1 amz* exited abnormally with code 255
In Emacs:
tramp: Opening connection at amz using ssh1...
tramp: Waiting for prompts from remote shell
tramp: Waiting 60s for prompt from remote shell
tramp-process-actions: Login failed
I also have other ssh configurations that they ssh to my virtual boxes on my local machine and they have the same problem.
I really appreciate any help.
One thing that's worth trying is using the sshx connection method. That makes tramp try to avoid any non-standard shell configuration on the remote host.
Like this:
C-x C-f /sshx:amazon:
The tramp method ssh1 forces ssh to be run in ssh v1 protocol mode with the parameter -1. ssh v1 has known weaknesses and is insecure. Hence a lot of sites disable the ssh v1 protocol.
You can verify this from the shell with ssh -1 me#xxxx.amazonaws.com.
Try other tramp connection methods like ssh, sftp or scpx. You can see all pre-configured connection methods with C-h v tramp-methods.
If Moritz Bunkus's answer doesn't solve the issue, then you can configure the verbosity of tramp's output with
M-x customize-variable RET tramp-verbose RET
In particular, level 6 is "sent and received strings" which might help you to determine whether the "Waiting for prompts from remote shell" is because it isn't receiving a prompt pattern that it recognises, or because of some more critical failure.
If it's simply receiving a prompt it doesn't recognise, then you might look at customizing the tramp-login-prompt-regexp or tramp-shell-prompt-pattern variables.
(Of course if your ssh agent is working correctly, then login prompts shouldn't be relevant.)
If you're running Emacs in Windows, then also see these Q&As:
Emacs: Tramp doesn't work
Using tramp with EmacsW32 and cygwin, possible?
Related
Earlier this week I tried ssh'ing into my lab machine (as I do very frequently) via tramp mode (ubuntu 14.04) and now it seems to not work out of the blue. I have tried checking all folder permissions, that ssh actually works (in terminal, even nested in emacs). However, it still will not connect me. I see the connection in my .ssh file so I am not sure what the issue is. Any ideas? This is killing my productivity since I would much rather tramp in vs git everything.
######### from C-x C-f ssh:user#host...etc (which has always worked in the past) #######
ssh: Could not resolve hostname ssh: Name or service not known
########## from *Messages buffer* #####################
Tramp: Opening connection for ssh using scp...
Tramp: Sending command `exec ssh -e none ssh'
Tramp: Waiting for prompts from remote shell
Tramp: Sending command `exec ssh -e none ssh'
Tramp: Opening connection for ssh using scp...done
byte-code: Process died
side note: I did start having pop-ups w/ system program problem detected but the ONLY thing in the /var/crash folder is a virtual box issue so I cant imagine that could be it. (Can I purge emacs and grab my config again and solve it that way?)
The error message clearly indicates that you are doing C-x C-f /ssh:user#host/path/to/file. A colon is missing after host. Pls open this like C-x C-f /ssh:user#host:/path/to/file.
I am running graphical Emacs 24.3.1 (this problem exists when using the console version as well) on Arch Linux. I am trying to use TRAMP to open files on a remote Fedora system by SSH with a private key which requires a password. Authentication works fine, and so does the listing of files. When I do try to open a file, my Emacs session hangs with "Tramp: Inserting `/{filename I'm trying to open}' ...done". It is not possible to abort with ESC ESC ESC or C-g. Does anyone have a solution to this?
Emacs 24 normally works very well with Tramp. What you might need is ControlMasterAuto in your .ssh/config file. This will ensure that the ssh connection information passes seamlessly to Emacs. This will also ensure that you only need to login once in a terminal and use multiple emacs frames in tramp mode. I have detailed the following steps
(1) Go to your .ssh/config file and add the following options
Host <hostname>
ControlMaster auto
ControlPath ~/.ssh/%r#%h:%p
ServerAliveCountMax=30
ServerAliveInterval=5
(2) Now login to the remote host through terminal.
(3) Open emacs frame and try opening the remote files through tramp (/ssh:). You must be able to connect to the remote host.
The above steps should work even for a two level authentication (using a rsa key +password).
This thread is old - however, a very similar problem on my FC22 laptop (tramp hanging when trying to type a colon following /su in the minibuffer) appears to be fixed by commenting the ::1 line in /etc/hosts.
I'm trying to use Tramp/Emacs-23 in Ubuntu 12.04 in order to edit the remote host files. My remote host has two step authentication (RSA+Passwd). I use multiplexing through .ssh/config to ensure that tramp can directly connect to the remote shell without having to provide passwords.
My problem however is that I have 3 different remote hosts. When I try to connect to remote host through tramp without the initial multiplexing (through terminal), the TRAMP hangs with a message stating "Tramp: Waiting for prompts from remote shell". I used the below mentioned commands in .ssh/config to ensure the connection gets lost after a specified interval upon no prompt.
Host *
ServerAliveCountMax=30
ServerAliveInterval=5
However this doesn't seem to have any effect on the tramp connection. It will be of help if someone can help me in fixing this issue.
Sorry that your question has been left hanging so long.
I can offer a couple of things to try, use the tramp protocol sshx instead of ssh, it seems to cope better with most non-vanilla ssh connections.
e.g.
/sshx:user#host:path/filename
The other thing to try is adding your ssh key passphrase to the session at startup, run an ssh-agent on the machine, and connect to it at startup, then run ssh-add to enter the passphrase once.
As a side note, upgrade your Emacs to 24.3 there's a lot of new/great stuff in there since 23.x
Could somebody please help me setup Emacs Tramp to do a double hop?
I want to work on machine2.abc.def.edu to which I can connect only through machine1.abc.def.edu. My username is myname, on both machines same.
I've tried to add .emacs:
(add-to-list 'tramp-default-proxies-alist
'("\\`machine2\\.abc\\.def\\.edu\\'"
"\\`myname\\'"
"/ssh:machine1\\.abc\\.def\\.edu:"))
This is my best guess interpretation of what's in the manual. Then I do:
C-x C-f /ssh:machine2.abc.def.edu
or:
C-x C-f /ssh:rsuhada#machine2.abc.def.edu
But both give:
ssh: Could not resolve hostname ssh: nodename nor servname provided, or not known
Process *tramp/scpc ssh* exited abnormally with code 255
And my Aquamacs can't be quitted and have to killed from shell... There is a 2 years thread here with same question. I've tried the answer from there:
(add-to-list 'tramp-default-proxies-alist
'("machine2.abc.def.edu"
nil
"/ssh:myname#machine1.abc.def.edu:"))
With same results... also for all combinations I could come up with... Remote editing on machine1.abc.def.edu works fine, though.
The answer it to use the ssh_proxy command available in ssh_config. Documented here and here. Basically you create a config file in your ssh folder that you can write shortcuts in. One of your shortcuts is to use a proxy through another end point. All of your shortcuts work for any tool that uses ssh including git and emacs.
Host endpoint2
User myusername
HostName mysite.com
Port 3000
ProxyCommand ssh endpoint1 nc -w300 %h %p
Host endpoint1
User somename
HostName otherdomainorip.com
Port 6893
In this example running ssh endpoint2 will automatically hop through endpoint1.
Okay, let's try something different then, without opening a tunnel. How about the following in your .emacs file:
(add-to-list 'tramp-default-proxies-alist
'("\\`machine2\\'"
nil
"/ssh:%u#machine1.abc.def.edu:"))
This is different from the code you found in the forum post in two points:
it adds ticks around the target host
name (Emacs regexp syntax to avoid
matching partial names)
it uses only
the subdomain name in the target
host (you reported in a comment
below that you cannot ssh to
machine2 when you use the full
domain name)
Does that help when you try to access a file on machine2?
Set up an ssh tunnel from machine1 to machine2 (assuming that sshd runs on port 22 on machine2):
machine1.abc.def.edu> ssh -f -N -L 2222:localhost:22 machine2.abc.def.edu
Then either connect to machine2 from Emacs like this:
/ssh:machine1.abc.def.edu#2222
or add the following line to your .emacs:
(add-to-list 'tramp-default-proxies-alist
'("\\`machine2\\.abc\\.def\\.edu\\'" nil
"/tunnel:machine1.abc.def.edu#2222:"))
How can I edit files on my remote host using my local Emacs when I can access the remote host only through SSH with public key authentication? Tramp handles normal password logins pretty well but I can't figure out how to get it work with key pairs. I'm using unix/linux on both ends.
There is no TRAMP equivalent to ssh user#host -i private-key.pem. However, if you run the shell command ssh-add private-key.pem, then ssh (and thus TRAMP) will automatically use private-key.pem for authentication. Simply ssh user#host will work on the shell, and opening the file /user#host:~/filename.txt will work in emacs, without it prompting for a password.
I don't get your question as Tramp works perfectly well with public-key authenticated SSH connections.
For instance, assuming you have set the following config in ~/.ssh/config:
Host remotehost
User mylogin
Port 22
Hostname remotehost.fqdn
and assuming that you can run ssh remotehost correctly in a terminal, then you are able to open your remote file using TRAMP C-x C-f /remotehost:path/to/file
If you are on Windows you can use plink with tramp easily. You have to make sure the plink binary is in your path and have to customize the variable (M-x customize-option) tramp-default-method to plink which combined with pageant would get you what you want.
I let you read the putty home page how to configure pageant to add your key.
There is the method plinkx as well which use the profile name so when you do a :
C-x C-f /putty_profile:
It will get the putty_profile from your putty saved profile name.
If you are using Linux usually modern distros should have the gnome keyring (named as well seahorse) starting X with a global SSH agent. Example on my debian distro :
chmouel#lutece:~$ ps aux|grep ssh-agent
chmouel 2917 0.0 0.0 4904 552 ? Ss Aug30 0:00 /usr/bin/ssh-agent /usr/bin/dbus-launch --exit-with-session /usr/bin/seahorse-agent --execute x-session-manager
if you do a ssh-add (making sure you have identity in your ~/.ssh properly configured) it should request for your password and identify for all your X session.
If it does not happen you probably have a problem somewhere else in your distro.