By understanding its various options and capabilities, you will be able to use it more effectively and efficiently to manage your system. Whether you are a beginner or an experienced Linux user, the sudo command is an essential tool that you will regularly use in your day-to-day work. The sudo command is a powerful tool that allows you to run commands as the superuser, edit files as the superuser, run commands as another user or group, repeat the last command with sudo, launch the default shell with superuser privileges, and much more. To launch ist the allowed (and forbidden) commands for the invoking user, use the following: sudo -list Then, you can run sudo adduser appuser sudo to add appuser to the sudoers group. First, open terminal with a user that has sudo permissions. bash_profile, etc.), use the following: sudo -login -user=user 2 Answers Sorted by: 1 You can easily add appuser into the sudoers group. To launch the default shell as the specified user, loading the user’s environment and reading login-specific files (.profile. To launch the default shell with superuser privileges without changing the environment, use the following: sudo -shell bash_profile, etc.), use the following: sudo -login To launch the default shell with superuser privileges and run login-specific files (.profile. Where username is your passwordless sudo user. If you need to launch the default shell with superuser privileges, you can use the -login or -shell options with the sudo command. The sudoers file is a file that administrators use to allocate system rights to users. You can repeat it with sudo using the following command: sudo !! To repeat the last command prefixed with sudo (only in bash, zsh, etc.),įor example, if you just ran the following command ls /tmp To do this, you can use the -user and -group options with the sudo command: sudo -user=user -group=group id -a In some cases, you may need to run a command as another user or group. To edit a file as the superuser with your default editor, use the following: sudo -edit /etc/fstab If you need to edit a file as the superuser, you can use the -edit option with the sudo command. To run a command as the superuser, use the following: sudo less /var/log/syslog The most basic usage of the sudo command is to run a command as the superuser. This helps to prevent accidental damage to the system and to maintain security by allowing users to perform administrative tasks only when necessary. Instead, they must use the sudo command to temporarily elevate their privileges to the root level. The root user has complete control over the system and can perform any action, including modifying system files, installing software, and modifying system settings.īy default, most Linux distributions do not allow regular users to run commands as the root user. The sudo command in Linux is used to execute a command with administrative privileges, also known as superuser or root access. As time allows, I will publish articles on the 90 commands geared toward Linux sysadmins and Linux power users. This article is a follow-up to the previous 90 Linux Commands frequently used by Linux Sysadmins post.
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