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comment Best Practice: “One per-user ssh key” or “multiple per-host ssh keys”
Basically, what we have are cron jobs which need to invoke remote commands (via SSH) and SCP files. These cron jobs are owned by a accounts not associated with a human. For example, an account called "autodrop" runs a cron job which SCPs files into a directory and invokes a command on the remote host to process the files. For this discussion, it's not important exactly what "autodrop" accomplishes by doing this -- only that "autodrop" runs unattended. There's no human sitting behind a console to type in a passphrase (autodrop's private key is not encrypted).
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asked Best Practice: “One per-user ssh key” or “multiple per-host ssh keys”