Perimission Denied sudoers

leydijo · 11-18-2018, 11:29 AM

I installed ubuntu for the first time and I wanted my user to be an administrator so I followed some step by step that I found were
nano / etc / sudoers.
in the line that says #User privilege specification
root ALL = (All: ALL) All
leydi ALL = (All: ALL) All
save changes and then throw me this message
Error reading / etc / sudoers: permission denied
if I execute visudo it shows me visudo: / etc / sudoers: Permission denied

now it does not allow me to do anything, and I can not find the solution.

Thank you

pan64 · 11-18-2018, 01:31 PM

You need to boot into single user mode and restore that file (including permmissions).
I don't know what did you follow, but as you can see the result was not really good. Next time use visudo, nothing else (that will save you a lot of time).

flshope · 11-18-2018, 02:37 PM

Just FYI -- To boot into single user mode as pan64 suggests, reboot your computer. When the Grub page appears, immediately hit the down arrow key and select Advanced Options for Ubuntu. A menu of boot options should appear. Choose the recovery mode for the newest kernel. Then a new menu box should appear (if you have 18.04), one item of which should allow you to boot to a root level terminal. That should give you a text-only screen and terminal with full root permissions. All disks should be automatically mounted.

berndbausch · 11-19-2018, 01:40 AM

Quote:

Originally Posted by leydijo

I installed ubuntu for the first time and I wanted my user to be an administrator so I followed some step by step that I found were
nano / etc / sudoers.
in the line that says #User privilege specification
root ALL = (All: ALL) All
leydi ALL = (All: ALL) All
save changes and then throw me this message
Error reading / etc / sudoers: permission denied
if I execute visudo it shows me visudo: / etc / sudoers: Permission denied

Did you run nano /etc/sudoers and visudo as root?

Quote:

now it does not allow me to do anything, and I can not find the solution.

what do you mean by anything? Do all commands you enter fail, or does sudo fail?

ondoho · 11-20-2018, 03:09 AM

Quote:

Originally Posted by leydijo

I wanted my user to be an administrator

your user can become an administrator any time via the sudo command.
that means you need to enter your password.
this is a fundamental part of how linux works (compared to windows) - please do not change that.

BW-userx · 11-20-2018, 07:11 AM

should that not be all caps for the designation?

Code:

 ##
## User privilege specification
##
root ALL=(ALL) ALL

## Uncomment to allow members of group wheel to execute any command
# %wheel ALL=(ALL) ALL

## Same thing without a password
 %wheel ALL=(ALL) NOPASSWD: ALL

## Uncomment to allow members of group sudo to execute any command
# %sudo ALL=(ALL) ALL

I think putting users in a group 'wheel' or 'sudo' would be your best bet.

Lysander666 · 11-20-2018, 07:49 AM

I don't remember ever having to mess about with visudo in Ubuntu, I think it "just werked". It's possible that OP put the cart before the horse and tried to do too much too soon. If he could revert his changes he may find sudo works to his liking.

Failing that,

Code:

usermod -a -G sudo leydi

and reboot might work.

michaelk · 11-20-2018, 08:16 AM

Quote:

leydi ALL = (All: ALL) All

The user you created when you installed Ubuntu is the "administrator". As stated to run commands as root you need to use the sudo command.

sudo visudo

You will be prompted for your users i.e leydi's password. Again your already the administrator so you do not need to edit the sudoers file.