Score:0

Ubuntu

Adding a User from the Command Line: is not in the sudoers file. This incident will be reported

user487583

12/7/22, 11:52 AM

I usually work as root، no problem. But some recommend that to work as user (For security reasons). But they do not mention what problems you will face in this case.

These are the things I did.

I tried to create a username with adduser.

adduser USERNAME
su USERNAME
sudo true

And then I got this message:

sudo: unable to resolve host localhost: Name or service not known
[sudo] password for USERNAME:
USERNAME is not in the sudoers file.  This incident will be reported.

In the last step, you may have noticed a warning: sudo: unable to resolve host localhost: Name or service not known To fix this, I entered this command:

echo "127.0.0.1 localhost.localdomain localhost" > /etc/hosts

And it worked. Then I used this for the second message:

adduser USERNAME sudo

Adding user `USERNAME' to group `sudo' ...
Adding user USERNAME to group sudo
Done.

The problem must have been solved. right!?

su USERNAME
cd
sudo true

[sudo] password for USERNAME:
USERNAME is not in the sudoers file.  This incident will be reported.

But as you can see, the problem was not solved with the second message

adduser USERNAME sudo

The user `USERNAME' is already a member of `sudo'.

Now how do I solve this problem?

376

1 + 7

server

ssh

permissions

command-line

sudo

steeldriver

12/7/22, 1:11 PM

What is your Ubuntu version? it would be unusual for `localhost` not to already be in the `/etc/hosts` file so I wonder if your system has other non-Ubuntu features (such as group specification `%sudo` not actually being in the `sudoers` file)

user487583

12/7/22, 2:04 PM

@steeldriver Impish Idri it is there

user487583

12/7/22, 2:29 PM

@user535733 You know what's funny, this is even better than the released version, because I was getting three error messages there in 20.04.2. But here are just two of them.

terdon

12/7/22, 5:13 PM

Note that `echo "127.0.0.1 localhost.localdomain localhost" > /etc/hosts` has just removed anything that was in your `/etc/hosts` file and replaced it with `127.0.0.1 localhost.localdomain localhost`. That may or may not be a problem.

user487583

12/7/22, 7:42 PM

@terdon maybe next time I will change it with ```nano```.

user487583

12/8/22, 2:35 AM

@karel Not exactly, there are other things that are mentioned, some of which are completely unrelated to this issue. Some of them may corrupt the whole system!.

user487583

12/12/22, 4:29 AM

@terdon I reinstalled and checked it was completely empty. So there was nothing in it to be removed.

Score:2

Ubuntu

Gagan

12/7/22, 1:07 PM

You will need to edit the sudoers file at /etc/sudoers, but make sure to do this using the command visudo and never edit that file directly since any mistake can break the sudo settings. You can refer to the following link for more info on the syntax for the sudoers file: https://www.hostinger.com/tutorials/sudo-and-the-sudoers-file/amp

0 + 5

user487583

12/7/22, 2:08 PM

I thought there should be a change in the sudoers file , But I'm not sure exactly what this change should be. I do not want to make the wrong change and make the situation worse than it is

Gagan

12/7/22, 2:26 PM

If you want the user to have full root permissions after providing the sudo password, add something like this: username ALL=(ALL)

user487583

12/7/22, 2:32 PM

Ok, I think I should use vim. (I do not know if it is possible with nano).

steeldriver

12/7/22, 2:38 PM

@ubunShitu you should always use `visudo` to edit the sudoer(s) files. You can specify which editor it uses via the `EDITOR` environment variable ex. `EDITOR=nano visudo`

user487583

12/7/22, 7:40 PM

@steeldriver I added this ```# User privilege specification root ALL=(ALL:ALL) ALL USERNAME ALL=(ALL:ALL) ALL ``` with ```nano /etc/sudoers``` and the problem was solved.

Elon Musk

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

EN: Adding a User from the Command Line: is not in the sudoers file. This incident will be reported

TH: การเพิ่มผู้ใช้จาก Command Line: ไม่ได้อยู่ในไฟล์ sudoers เหตุการณ์นี้จะถูกรายงาน

RO: Adăugarea unui utilizator din linia de comandă: nu se află în fișierul sudoers. Acest incident va fi raportat

RU: Добавление пользователя из командной строки: отсутствует в файле sudoers. Об этом инциденте будет сообщено

VI: Thêm Người dùng từ Dòng lệnh: không có trong tệp sudoers. Sự cố này sẽ được báo cáo

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