Managing sudo privileges on Linux

sudo is a command which grants superuser privileges to non root users. Using sudo is a practice for safety purposes, by using sudo we can use our device as a regular user avoiding dangerous behavior while being root while allowing to call superuser privileges if necessary. In other words we can start our regular user X session and use sudo only when we need privileges, of course, by default sudo requests the root password, but in this tutorial we’ll disable this.

In this tutorial you’ll find how to grant and remove sudo privileges, how to remove the password request when executing root commands and how to grant sudo privileges to all users belonging to a specific group. For this tutorial we will use Debian and Ubuntu based systems.

Adding a user to the sudo grou

To manage sudo privileges for users we’ll use the command usermod.

To grant sudo privileges to a user type:

usermod -a -G sudo USERNAME


Usermod: calls the program

-a: to add to a group

-G: to specify the group

USERNAME/ linuxhint: Replace for the correct username.

Another way is to edit the /etc/sudoers file by running the following command:

nano /etc/sudoers

Add the following line replacing “USERNAME” with your user.

USERNAME   ALL=(ALL)   ALL //gives user "username" sudo access

To remove a user from sudoers on Debian based distributions run the following command:

deluser USERNAME sudo

Disable password request when executing sudo

By default sudo will prevent the execution of privileged commands reserved to root by requesting a password as shown in the image below.

We can prevent sudo from asking authentication by editing the /etc/sudoers file

Run nano /etc/sudoers

Add the line below replacing username with your the correct username.

username ALL = NOPASSWD : ALL

In order to grant sudo privileges to a whole group giving sudo privileges to all users belonging to the group, edit the sudoers file by running nano /etc/sudoers and add the line shown below

%groupname    ALL=(ALL)       ALL

Press CTRL+X and Y to conform to save and exit.


As said in the beginning of the tutorial getting used to sudo is a good practice to keep our device safe and prevent dangerous mistakes, adding a regular user or a whole group to the sudo group is simple as one command.

I hope you liked this tutorial, keep following LinuxHint for more tutorials and tips on Linux administration.

ONET IDC thành lập vào năm 2012, là công ty chuyên nghiệp tại Việt Nam trong lĩnh vực cung cấp dịch vụ Hosting, VPS, máy chủ vật lý, dịch vụ Firewall Anti DDoS, SSL… Với 10 năm xây dựng và phát triển, ứng dụng nhiều công nghệ hiện đại, ONET IDC đã giúp hàng ngàn khách hàng tin tưởng lựa chọn, mang lại sự ổn định tuyệt đối cho website của khách hàng để thúc đẩy việc kinh doanh đạt được hiệu quả và thành công.
Bài viết liên quan

How to do a Port Scan in Linux

Port scanning is a process to check open ports of a PC or a Server. Port scanners are often used by gamers and hackers...

Security Vulnerability Hidden in Scarlett Johansson Image

There is a new security vulnerability found by the community hidden in an image of the famous bombshell actress Scarlett...

Top 5 Vulnerability Scanning Tools

The process of recognition, categorization and mitigation of vulnerabilities present in a network or application is called...
Bài Viết

Bài Viết Mới Cập Nhật


Mua Proxy v6 US Private chạy PRE, Face, Insta, Gmail

Mua shadowsocks và hướng dẫn sữ dụng trên window

Tại sao Proxy Socks lại được ưa chuộng hơn Proxy HTTP?

Mua thuê proxy v4 nuôi zalo chất lượng cao, kinh nghiệm tránh quét tài khoản zalo