![]() ![]() Sudo stands for "superuser do" and is the master key to your high-privilege admin tasks. Metaphor aside, sudo is your elevated privilege. ![]() It’s your "golden ticket," your security clearance, and your permission to do as you please. I’ll explain this later on for now, let’s take a look at what the sudo command is, why it's important, and how to configure it.ĭo you know those crime TV scenes where a plainclothes detective walks up and the uniformed officer stops them from entering the area until they flash their badge? We’ve all seen this drama unfold over the years, from the yellow tape to the pouring rain and the cliché trench coats, but what happens next? The uniformed officer takes a look, realizes that this person belongs on the scene, and lets them pass. This choice is unthinkable now, and honestly, it makes me laugh at myself for assuming I knew what I was doing. The sudo command is one that I didn’t use often before. It helps to understand what is going on behind the scenes and why you use specific arguments, flags, and objects. Sometimes, just knowing how isn’t good enough. As I started working in a more professional environment around people with years of experience and knowledge, I discovered that just because I could use a command did not mean that I understood the command. Even if it wasn’t the best command for the job, I had my way of doing things, and that worked for me. When I first started learning the Linux command line, I found myself memorizing commands for specific scenarios. How well do you know Linux? Take a quiz and get a badge.Linux system administration skills assessment.A guide to installing applications on Linux.Download RHEL 9 at no charge through the Red Hat Developer program.Just a quick note - I also wanted to make sure that the root user couldn't be used to login from the graphical login, and so was looking into ways to excluded. Close the file (CTRL+X) & exit the terminal.Save it (assuming you are in nano, which is the default, this is CTRL+O).After the other "Defaults" line, add: Defaults rootpw.Setting the "rootpw" flag instead tells SUDO to require the password for the root user.SUDO requires the user requesting root privileges.Change the SUDO configuration to require the root password.Set your new password for the ROOT user.This can be overcome by booting in with a Live Disk, mounting the hard drive, and editing the sudoers file, but it's best to avoid that. If you do not do this first, you will lock yourself out from accessing root privileges.This is CRITICAL to do FIRST! (Ubuntu automatically has no password for the ROOT user due to the standard security configuration.I know this question is old, but it is the most concise question I've found for this use case (which is a minor percentage, true, but nonetheless legitimate and helpful in the right scenario).Īfter putting all the steps together from various sources - including multiple answers to this question, these steps work on Ubuntu-Gnome 16.04 LTS: Note that if myuser is a member of sudousers then this behaviour overrides rootpw for them too (last matching entry overrides previous entries). This requires myuser to know the root password, but requires any member of the sudousers group to use their own password. suĮDIT: A clarifying example about exceptions and scope: Defaults rootpw To allow myuser to run sudo commands, sudousers would need to be added to its secondary groups. In plain English, myuser now has the ability to run ALL commands as any user on ALL hosts, so long as the root password is known.Īnother working possibility would be: Defaults rootpwĪny member of the sudousers group will have the ability to run ALL commands as any user on ALL hosts, so long as the root password is known. One working possibility would be: Defaults rootpw ![]() ![]() Wouldn't leave any user or group with the privilege to run commands as another user. Naively changing this simple config to: Defaults rootpw "ALL users on ALL hosts can impersonate (ALL) users when executing ALL commands."Īnd the Defaults targetpw means that they need to know the password of the user they are impersonating to do so. The second line would read out loud like: A common configuration that requires the password of the target (not what we want): Defaults targetpw ![]()
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