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From: andrew.maguire@ps.ge.com
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Subject: RE: buffer uid
Date: Thu, 16 Oct 2003 09:30:52 -0400
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> Is it possible to open a buffer and edit it as a different user?  In
> other words, if I have two user accounts, can I run emacs from one
> account and edit a file owned by the other account (and not writable
> by the account running emacs)?

If you have ftp access then you can try and use find-file with a path:

/user@host:/path/to/file

you will then be prompted for a password if necessary.
host can be "localhost" to use the same machine.
You can omit "user@" if you want to login as yourself.

Andrew