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1. SSH in your server as root.
2. Getting a password,
Run the command below to get a Plesk "admin" password:
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plesk bin admin --show-password
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3. Resetting a password,
Run the command below replacing ***** with your new password and keeping ' ' on the sides:
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plesk bin admin --set-admin-password -passwd '*****'
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4. For direct access to the Plesk from the server,
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plesk login
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