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2

Sudoers permission without loging in as root

rated 0 times [ 2] [ 0] / answers: 1 / hits: 13335 / 2 Years ago, wed, july 6, 2022, 9:24:53

I am a new user to Ubuntu 10.10

My problem is when I start my machine it takes me to login screen of Ubuntu

but I didn't get option for logging in as user or root

I know my root password and all

even cant make a ssh request

I goggled it I got to know to press Alt+Ctrl+F1
it takes me to login of user

in this user after logging I am unable to write sudo commands

After searching for a while I came to know that permission to sudo might be crating a problem

permission to a sudo must be 440 I think which is 777 now

How to start up with my root access

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laiuct

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Member since Mon, Feb 15, 2021

3 Years ago

answered 2 Years ago nerta · Accepted Answer

First of all if you haven't touched sudo or changed anything on /etc then its just your fear and you should read what Sergey has to say. Apart from that check if the file permission part is correct. Just do ls -l /etc | grep sudoers and see if the output is somthing like this:

-r--r-----  1 root    root       574 2011-03-25 20:34 sudoers

where -r--r----- part shows your permission to be 440 anything other than that should be changed to that as far as I know. If you can login as root on rescue mode, you can easily change file permission with chmod 440 /etc/sudoers command. If you are not allowed sudo command at all you may need an external live-usb to recover. Content of /etc/sudoers or visudo should look like this[atleast in my case]:

#

# This file MUST be edited with the 'visudo' command as root.

#

# Please consider adding local content in /etc/sudoers.d/ instead of

# directly modifying this file.

#

# See the man page for details on how to write a sudoers file.

#

Defaults    env_reset



# Host alias specification



# User alias specification



# Cmnd alias specification



# User privilege specification

root    ALL=(ALL:ALL) ALL



# Members of the admin group may gain root privileges

%admin ALL=(ALL) ALL



# Allow members of group sudo to execute any command

%sudo   ALL=(ALL:ALL) ALL



#includedir /etc/sudoers.d