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# Append the public key to the file <code>~/authorized_keys</code>
#* Set the permission on <code>~/authorized_keys</code> to 0600
== Disconnecting from and Reconnecting to an SSH Session ==
The GNU [http://www.gnu.org/software/screen/ screen] utility permits you to start a session, disconnect from it (accidentally or intentionally), and then reconnect from the same or another network connection. This is useful when you're using an unstable WiFi connection (e.g., in a coffee shop or mobile link) or want to start a long operation (such as a build or a test suite run) on campus, commute home while it's running, and then check on its status.