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enable the root account, simply give it a password:
sudo passwd -
To disable the root account, use the following passwd syntax:
sudo passwd -l root -
The parent directory alone is sufficient for preventing unauthorized access to anything below the parent.
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Simply disabling/locking a user account will not prevent a user from logging into your server remotely if they have previously set up RSA public key authentication.
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Remember to check the users home directory for files that will allow for this type of authenticated SSH access. e.g.
/home/username/.ssh/authorized_keys. -
in the file
/etc/ssh/sshd_config.AllowGroups sshlogin
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16 May 08
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