Does sudo always require a password?
By default, sudo needs that a user authenticates using a password before running a command. Some times you may need to run a command with root privileges, but you do not want to type a password using sudo command. This can be achieved by editing /etc/sudoers file and setting up correct entries.
Do you need sudo If you are root?
This is different from “su” which is not temporary. Using “sudo,” you can do pretty much the same things you can with “su.” To use it, you just have to add “sudo” in front of all root commands. Having root user privileges can be dangerous, but using sudo instead of su can help you keep your system secure.
Do you need a password to run Sudo?
Typically as a root user or another user. You can delegate common tasks such as reboot the server or restart the Apache or make a backup using sudo for unprivileged users. By default, sudo needs that a user authenticates using a password before running a command.
Why does Sudo passwd root Reset my root password?
So sudo passwd root tells the system to change the root password, and to do it as though you were root. The root user is allowed to change the root user’s password, so the password changes. The system is working as designed.
Is it safe to run Sudo as root in Ubuntu?
No, it’s not a security problem. If you have the ability to run sudo commands as root, which users generally do in Ubuntu, you’re fine. The idea behind sudo is that you can run commands as root, without logging in as root. Not a security problem.
Why is the sudoers nopasswd option not working?
Note: I cannot find any relevant system log messages, e.g. via tail -f /var/log/syslog. Here is /etc/sudoers. You should put that line after the line with the rule for the sudo group, because, as the sudoers man page states: When multiple entries match for a user, they are applied in order.