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Passwords in Emacs tramp mode editing

I'm using emacs tramp mode to remotely edit files over ssh. The problem is that every time I save the file I'm editing I have to enter my user password. I find that very annoying. How can I write my password only once / editing session?

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Jonas Avatar asked May 08 '09 15:05

Jonas


4 Answers

Ah, from the tramp docs on password caching you can set:

(setq password-cache-expiry nil)

which requires the package password-cache.el.

Also, in the tramp sources, it mentions reading the ssh-agent(1) man page, which shows how to set it up so that you don't have to re-enter passwords (inside, or outside of Emacs):

There are two main ways to get an agent set up: The first is that the agent starts a new subcommand into which some environment variables are exported, eg ssh-agent xterm &. The second is that the agent prints the needed shell commands (either sh(1) or csh(1) syntax can be generated) which can be evalled in the calling shell, eg eval ssh-agent -s for Bourne-type shells such as sh(1) or ksh(1) and eval ssh-agent -c for csh(1) and derivatives.

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Trey Jackson Avatar answered Nov 16 '22 16:11

Trey Jackson


(setq password-cache-expiry nil)
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dfa Avatar answered Nov 16 '22 16:11

dfa


In addition to Trey Jackson's solution, there are a few more ways you can choose:

  • If you're on a *nix system, you can mount the remote directory with FUSE/SSHFS, and therefore you can edit files as they were on the local file system.

  • Use SSH public key authentication.

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viam0Zah Avatar answered Nov 16 '22 18:11

viam0Zah


Using public key (RSA) authentication is more secure and much more convenient. On a GNU/Linux system (and maybe others, I don't know) you typically would unlock your private key once per login session with a password and then use it.

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Borbus Avatar answered Nov 16 '22 17:11

Borbus