Useful tips and stuff that matters » security http://www.theusefulblog.com Tips and tricks and stuff that matters for computers, internet, and many others. Thu, 26 Nov 2009 08:13:45 +0000 http://wordpress.org/?v=2.8.5 en hourly 1 Root Account and Single User Mode http://www.theusefulblog.com/post/root-account-and-single-user-mode/ http://www.theusefulblog.com/post/root-account-and-single-user-mode/#comments Wed, 04 Nov 2009 01:35:26 +0000 angelchen1111 http://www.theusefulblog.com/?p=383 To discourage people to use the root account, by default some distro such as Ubuntu don’t set a password for the root user. This way people cannot login with the root account directly. However, without setting a password for root user, people can log into single user mode (aka recovery mode) with the root account without password, and then the user can do anything including change the password of any users.

You should set a password for the root user even if the distro doesn’t tell you to do so during the installation. If you haven’t set up a password for the root user yet, you can do so by typing sudo passwd root and type the new password. Once you set the password for the root user, next time you log in to single user mode or recovery mode, it will ask you for root’s password instead of just let you in.

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