I'm new to ubuntu .. i tried to use su command to enter as a root but didn't work but i tried to use sudo -i , su root and sudo -s worked
I need to know why su didn't work ?
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1Because the user root is disabled by default in Ubuntu. – Terrance Feb 28 '17 at 22:25
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how can i make it enable ? – sam Feb 28 '17 at 22:25
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You give it a password, but it is not recommended since you can use sudo to accomplish what you would need as a root user. – Terrance Feb 28 '17 at 22:26
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1One reason why you don't want it enabled is that it is the number one account that hackers use to break into systems with. http://askubuntu.com/a/44419/647604 – Terrance Mar 01 '17 at 04:03
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By default, for security reasons, Ubuntu disables root login.
If, for some reason, sudo does not do what you want it to, or you would like to directly login as root on a TTY, open a terminal and execute:
sudo passwd root
This will prompt you for your password, then a new root password. As usual, the password will be hidden, without replacement characters. Please try and use sudo as much as possible and only use the above as a last resort, as this is not recommended.
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