However, this does not apply to commands in subdirectories of /bin directory.įor example, to allow Alice to execute all commands in the /bin/ directory we write: alice ALL=(ALL) NOPASSWD: /bin/Īlice can now execute all commands on all hosts that require sudo privileges located in the /bin/ directory without requiring a password. This would mean that the user can execute any command in the /bin directory. Instead, we could include the whole directory and end with a ‘/’ character. Notice how we list commands in the /bin/ directory, such as bin/systemctl, or /bin/cat. We can also allow specific users (alice, bob) to execute specific commands (systemctl, cat, kill) by listing them as follows: bob,alice, ALL=(ALL) NOPASSWD: /bin/systemctl, /bin/cat, /bin/killĪfter saving the file, alice and bob can execute systemctl, cat, and kill commands on all hosts without being prompted for a password. For example, if we only want a specific user or group to execute specific commands, we paste the following line in the sudoers file: alice,%group2 ALL=(ALL) NOPASSWD: /bin/systemctl, /bin/cat, /bin/killĪlice and all users belonging to group2 can execute all systemctl, cat, and kill commands with sudo and not have a password prompt. We can also combine users, groups, and commands. We can also allow sudo commands to run without entering a password for a group of users, say group1 to which user Alice belongs. Run Sudo Commands Without Password for Group Users However, when we try to stop the mariadb service, we are prompted for a password since we did not specify it in the sudoers file. ![]() Run Multiple Sudo Commands Without PasswordĪll three commands are executed without requiring a password. The user can also concatenate the /etc/sudoers file without entering a password. Here we allow the user Alice to start and check the status of the mariadb service without entering a password while on a host with the hostname linuxshelltips1. To allow three commands to be executed with sudo privileges for a host linuxshelltips1 and not have a password prompt we list them as follows: alice linuxshelltips1=(ALL) NOPASSWD: /bin/systemctl start mariadb, /bin/systemctl status mariadb, /bin/cat /etc/sudoers The above allows Alice to execute the listed command on a host with the name linuxshelltips1 without entering a password. To allow the user to execute the commands on a specific host as root, instead of using ALL we write: alice linuxshelltips1=(root) NOPASSWD: /bin/systemctl start mariadb Run Sudo Commands on Specific Host Without Password Also notice that for the subsequent commands, we have a password prompt. Now try to execute a few commands and see… $ sudo systemctl start mariadbįrom the above terminal session, we started the MariaDB service because of the changes we made to the sudoers file, we do not have a password prompt. ![]() Run Specific Sudo Commands Without Password alice ALL=(ALL) NOPASSWD: /bin/systemctl start mariadb To allow user Alice to execute a single specific sudo command without entering a password, you need to use the following line to the sudoers file. Run Sudo Commands Without Password Run Particular Sudo Commands Without Password $ sudo visudoĪnd use the NOPASSWD directive as shown: alice ALL=(ALL) NOPASSWD: ALL If we want user Alice to execute all sudo commands without needing a sudo password for any/all hosts, we edit the sudoers file. Run Command with Sudo Run Sudo Commands Without Password Editing the /etc/sudoers Fileįirst, let us try to execute a command with sudo and see if we get a password prompt: $ sudo systemctl start mariadb The first two involve editing the sudoers and sudoers.d files while the last two involve executing commands to elevate user privileges to root. We discuss four ways in which we can execute sudo commands without having to enter a password every time. The syntax of the sudo command is as follows: $ sudo -help The sudo command temporarily elevates user privileges allowing a user to execute sensitive commands or access files without restrictions. ![]() While working with Linux, we find that access to some files or performing sensitive operations requires users to have elevated privileges.
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