Please keep in mind, a substantial number of Ubuntu users are new to Linux. Just remember, when sudo asks for a password, it needs YOUR USER password, and not the root account password. the network configuration applet), use graphical sudo and you will also be prompted for a password (more below). Similarly, when you run GUI programs that require root privileges (e.g. For more extensive usage examples, please see below. This means that in the terminal you should use sudo for commands that require root privileges simply prepend sudo to all the commands you need to run as root. This is where sudo comes in - it allows authorized users (normally "Administrative" users for further information please refer to AddUsersHowto) to run certain programs as root without having to know the root password. However, since the root account physically exists it is still possible to run programs with root-level privileges. This means that you cannot login as root directly or use the su command to become the root user. In some cases, this is necessarily root, but most of the time it is a regular user.īy default, the root account password is locked in Ubuntu. Ideally, you run as a user that has only the privileges needed for the task at hand. You could type a command incorrectly and destroy the system. The SuperUser can do anything and everything, and thus doing daily work as the SuperUser can be dangerous. The Windows equivalent of root is the Administrators group. In Linux (and Unix in general), there is a SuperUser named root. Note: For help with configuring sudo privileges via its configuration file /etc/sudoers, please see Sudoers. Using caution and consulting with others on the Ubuntu Forums or Ask Ubuntu is highly recommended! You can then exit nano using Ctrl + X.įor the changes to take place, you may have to login/logout, or restart the system, or launch a new terminal window.MaPLEASE NOTE: This wiki article is being significanly rewritten as it contains a good deal of old, dated and possibly questionable material. If you made any changes to the sudoers file using the instructions shared above, then make sure to save the file using Ctrl + O for the changes to be applied. This is for explanatory purpose only, you don’t have to force these restrictions to sudo users on your system. Important Note: The suggested changes in the sudoers file above will restrict sudo users to only be able to execute commands mv and visudo. %sudo ALL=(ALL:ALL) /bin/mv, /usr/sbin/visudo ![]() # Allow members of group sudo to execute any command The last ALL in the line can be replaced with the only command, or set of commands which should be allowed with sudo. Scroll and find the lines below in the file. The above command will open the file using the nano command line editor. ![]() The only way to edit this file is using the visudo command. This file is write protected directly, even for root. The file /etc/sudoers contains configuration options for sudo command. sudo adduser testuser -ingroup=sudo Restrict which commands should be allowed with sudo It can be used withįlag -ingroup to add the user to group sudo during creation. Create a new user with Sudo privilegesĪdduser is the Linux command used to create a new user. To run a command as administrator (user "root"), use "sudo ". ![]() Once a user is added to the sudo group, the following message is displayed in terminal the next time this user logs in on the system. G is for specifying which group to add the user to. It makes sure existing groups’ membership of the user is not affected. To add a user to sudoers list, use the usermod command to add an existing user to the sudo group on the system. It will throw below output: testuser is not in the sudoers file. If a user is not part of the sudo user group, it’ll will not be able to use the sudo command. See an example failed attempt below: apt-get install aptitudeĮ: Could not open lock file /var/lib/dpkg/lock-frontend - open (13: Permission denied)Į: Unable to acquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), are you root?Ī non-root user with sudo can install programs on the system without any issues. Non-root user without sudo cannot install a program. However, the user can do so with sudo command. It is mostly used for administrative purposes providing limited admin access to non administrative users on a Linux PC.įor example, by default, a user is not allowed to install packages on an Ubuntu system. It allows a user to run a particular program as another user, who, by default, is the super user. Sudo is one of the most commonly used command in Linux systems.
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