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I have script that runs remote login using SSH, copies a file from that remote machine using SCP without asking for a password, however, the change only works for the terminal where I am running the script. If I try to execute this same script on a different terminal, it will prompt me for a password.

Is there a way I can create a script that will prompt for my password once, then not ask for my password the next time the script is run?

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Use the ssh-copy-id [user@]machine command to install your public key in the remote machine's authorized_keys.

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ssh is rather paranoid of its passwords. You can use its drop-in replacement from putty, it allows to load password from file or even command-line.

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You can setup a master SSH connection that accepts multiplexing connections. See the options -M and -S of the SSH client manual.

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