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Let’s say you want to backup some files on a server, but not clone the whole thing. Here’s a way to do it that’s nice and easy to maintain over time.
I want to SSH into a server with one user account, but be presented with another user’s prompt — as if I connected and immediately ran
sudo -su someone-else.
Let’s say your current working directory is full of subdirectories and files. You want all the subdirectories to have one set of file permissions (say,
664), and all of the files to have a different set of permissions (for example,
This site is built in a GitHub Action, which means that I end up with a big folder of HTML files (and other stuff) which I need to get from the build environment onto my production server. To keep it simple, I wanted to use an SSH-based method to do that (so I don’t need to set up FTP or something), and
rsync is a nice utility which fits the bill – it even handles deleting old files which aren’t needed any more.
I didn’t like the idea of supplying my Action with a set of keys which can access my entire server: that seems like too much power. Introducing
rrsync, or restricted rsync, which allows you to limit where a given set of SSH keys can read and write. Let’s set it up.