user is not in the sudoers file. This incident will be reported. How to fiw this pb ?

I have this error message :


user is not in the sudoers file.  This incident will be reported.



I want to know to fix it

I found how to fix this pb


* Type the command :  pkexec visudo

You will be asked to make uthentification like this below :



the file will be opened :

and you add your account user to the file like this below :

# 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
regabdou ALL=(ALL) ALL

# See sudoers(5) for more information on "#include" directives:

#includedir /etc/sudoers.d

* push on CTRL + X

* type Y

* Entree

Now the problem is fixed

regabdou@algerien1970-Dell:~$ sudo apt-get install csh
Reading package lists... Done
Building dependency tree      
Reading state information... Done
csh is already the newest version.
The following packages were automatically installed and are no longer required:
  aglfn libquvi-scripts libquvi7 libupstart1 linux-headers-3.13.0-44
  linux-headers-3.13.0-44-generic linux-headers-3.13.0-45
  linux-headers-3.13.0-45-generic linux-image-3.13.0-44-generic
  linux-image-3.13.0-45-generic linux-image-extra-3.13.0-44-generic
  linux-image-extra-3.13.0-45-generic printer-driver-hpijs unity-2d-shell
Use 'apt-get autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 169 not upgraded.