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2025-01-27 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Servers >
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This article focuses on "how to check which users of Linux have sudo permissions". Interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn "how to check which users of Linux have sudo permissions".
1. Preface
This tutorial will show you how to see if the Linux user has sudo privileges. You will also learn how to view all sudo users on the Linux system.
How to see which users in Linux have sudo permissions
Want to know if your current user has sudo privileges on the system? It's easy to verify. Just run any command with sudo. If you don't have sudo permission, you should see it in the output:
Oucanrong@zcwyou:~$ sudo-v
Output result:
Sorry, user standard may not run sudo on linuxhandbook.
That's cool! But what if you check to see if other users have sudo privileges? You can do it, too. I'll show you how to do it.
two。 How to test whether a user has sudo permissions
There are several ways to check whether Linux users can use sudo. This article introduces some.
(1) method 1: use the sudo command to check whether the user is sudoer
The sudo command itself provides an option to see if the user can run the command using sudo. In fact, it tells you which commands a user can run using sudo.
Use the sudo command to see if the user is a sudoer
To check the user's sudo access, run the following command:
Suppose the user name is user_name
Sudo-l-U user_name
If the user can run some or all of the commands with sudo, you should see output like this:
Matching Defaults entries for abhi on test-server: env_reset, mail_badpass, secure_path=/usr/local/sbin\: / usr/local/bin\: / usr/sbin\: / usr/bin\: / sbin\: / bin\: / snap/bin User zcwyou may run the following commands on test-server: (ALL: ALL) NOPASSWD: ALL
As with the output above, user zcwyou can access and run all commands through sudo. If the user does not have sudo privileges, you should see output like this:
User zcwyou is not allowed to run sudo on test-server.
If you want to see if the user has sudo privileges and which commands can be used to run sudo, you can use the same command, but do not provide a user name.
Sudo-l
(2) method 2: check whether the user belongs to the `sudo` group
Another way to determine whether a user has sudo access is to see if the user is a member of the sudo group.
There are several ways to view the groups of users in Linux. The simplest and my favorite method is to use the groups command like this:
Suppose you want to view the corresponding group of the user user_name
Groups user_name
If you see the group sudo in the output, the user is a member of the sudo group and should have sudo access.
Oucanrong@zcwyou:~$ groups ocr
Ocr: ocr sudo
(3) extra hint: how to view all sudo users on your system
You have learned how to check whether the user has access to sudo. How to list all sudoers files in Linux system?
Extra hint: how to view all sudo users on your system
If you have read this article, the answer is simple. All you need to do is list the members of the sudo group.
In Linux, there are several ways to achieve the same result. It's not surprising that there are several ways to list the members of a group in Linux.
To list all sudo users of the system, list the members of the sudo group as follows:
Getent group sudo
The following command views all users on the system who have sudo privileges:
Getent group sudo
Output result:
Sudo:x:27:ocr,zcwyou so far, I believe you have a deeper understanding of "how to check which users of Linux have sudo permissions". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!
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