在 Emacs 中使用 su/sudo 打开文件 [英] Open a file with su/sudo inside Emacs

问题描述

假设我想在现有的 Emacs 会话中使用 su 或 sudo 打开一个文件，而不需要进入 shell 并执行 sudoedit或 sudo emacs.一种方法是

Suppose I want to open a file in an existing Emacs session using su or sudo, without dropping down to a shell and doing sudoedit or sudo emacs. One way to do this is

C-x C-f /sudo::/path/to/file

但这需要昂贵的通过SSH往返.有没有更直接的方法?

but this requires an expensive round-trip through SSH. Is there a more direct way?

@JBB 是对的.我希望能够调用 su/sudo 来保存和打开.保存时重新授权是可以的(但并不理想).我正在寻找的是 find-file 和 save-buffer 的变体，它们可以通过 su/sudo 进行管道传输".

@JBB is right. I want to be able to invoke su/sudo to save as well as open. It would be OK (but not ideal) to re-authorize when saving. What I'm looking for is variations of find-file and save-buffer that can be "piped" through su/sudo.

推荐答案

Tramp 的好处在于，您只需在打开第一个文件时支付到 SSH 的往返费用.然后 Sudo 会缓存您的凭据，Emacs 会保存一个句柄，以便后续 sudo 打开的文件花费更少的时间.

The nice thing about Tramp is that you only pay for that round-trip to SSH when you open the first file. Sudo then caches your credentials, and Emacs saves a handle, so that subsequent sudo-opened files take much less time.

我也没有找到节省负担所需的额外时间.够快了，海事组织.

I haven't found the extra time it takes to save burdening, either. It's fast enough, IMO.

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