Ubuntu User has Sudo/Root Access

Kyle

6/12/23, 9:14 PM

I have a user called Ubuntu which has root/sudo access after removing the user Ubuntu from group sudo.

sudo deluser ubuntu sudo

Groups Ubuntu user is currently in:

../html/ $ groups
ubuntu adm dialout cdrom floppy audio dip video plugdev netdev lxd

inside /etc/passwd

ubuntu:x:1000:1000:Ubuntu:/home/ubuntu:/bin/bash

using sudo -l

../html/ $ sudo -l
Matching Defaults entries for ubuntu:
    env_reset, mail_badpass, secure_path=/usr/local/sbin\:/usr/local/bin\:/usr/sbin\:/usr/bin\:/sbin\:/bin\:/snap/bin

User ubuntu may run the following commands:
    (ALL) NOPASSWD: ALL
    (ALL) NOPASSWD: ALL
    (ALL) NOPASSWD: ALL
    (ALL) NOPASSWD: ALL
    (ALL) NOPASSWD: ALL
    (ALL) NOPASSWD: ALL

I'm new to Linux administration and would like to know why this user is able to access sudo / root without using root password?

0 + 0

permissions

bash

sudo

user535733

6/12/23, 9:27 PM

The 'ubuntu' account is necessary in cloud images and Ubuntu Base and containers and other copied (not installed) types of Ubuntu instances -- you need an account for the first login. Best practice is to use the 'ubuntu' account to set up your own secure, key-protected admin account, test your key access and your admin powers, then delete the 'ubuntu' account entirely.

waltinator

6/12/23, 11:08 PM

You do understand that the Ubuntu system disallows `root` login. If you don't have a `sudo`-capable userid, you won't be able to manage your system.

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: Ubuntu User has Sudo/Root Access

TH: ผู้ใช้ Ubuntu มีการเข้าถึง Sudo / Root

RO: Utilizatorul Ubuntu are acces Sudo/Root

RU: Пользователь Ubuntu имеет доступ к Sudo/Root

VI: Người dùng Ubuntu có Quyền truy cập Sudo/Root

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