How do I change from user to superuser (root)? What command do I use in the Terminal to switch to root? I have tried
--help but I get lost with all the listed help. I'm looking for a recent download/install so I can use it.
Launch an instance of your terminal (press CTRL+ALT+T or search for "terminal" in the Dash). This will give you your normal shell from which you can run commands or programmes without root access.
To get root access, you can use one of a variety of methods:
sudo <command>and type in your login password, if prompted, to run only that instance of the command as root. Next time you run another or the same command without the
sudoprefix, you will not have root access.
sudo -i. This will give you an interactive root shell. Note that the
$at the end of your prompt has changed to a
#, indicating that you have root access. But you fall in the root home directory (
/root/). From here you can run any sequence of commands as root, or run the command
exitto leave the root shell.
su(substitute user) command to get a root shell. This is effectively the same as using
sudo -i. Note that when you use this command it will ask for the root password and not your login password. These are not the same. You may have to set or change the root password by running
sudo passwd rootfirst.
sudo -s. This gives you root access, but maintains your current SHELL. Shell specific settings, including your current directory, are preserved. For instance if you use
bash(Ubuntu's default shell), aliases (and any other settings from
~/.bashrc) are kept when you switch to the root user. To leave the root access, type
exitas in the cases above.
Be advised that playing around with root access is dangerous, and if you had to ask about root access, you probably shouldn't have the privilege. You have the potential to completely ruin your entire system with the mis-execution of many commands. Be careful and verify what you are doing before you do it.
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