Thanks to Lukas:

Step 0: Install freipa-client on ubuntu 14.04 and configure sudo integration

root@ubuntu1404:/# ipa-client-install --no-ntp
root@ubuntu1404:/# echo "sudoers: files sss" >> /etc/nsswitch.conf

root@ubuntu1404:/# grep services /etc/sssd/sssd.conf
services = nss, pam
root@ubuntu1404:/# sed -i -e 's/\(services.*\)/\1, sudo/' /etc/sssd/sssd.conf
root@ubuntu1404:/# grep services /etc/sssd/sssd.conf
services = nss, pam, sudo

Step 1: configure sudo rules for ordinary user
     Please follow the instructions from FreeIPA documentation.
     http://www.freeipa.org/docs/master/html-desktop/index.html#sudo

  This step was skipped, becuase it was already done few months ago

Step 2: login to machine as ordinary user, which is allowed to use sudo.

$ su usersssd01
Password:
$ id
uid=325600011(usersssd01) gid=325600011(usersssd01) 
groups=325600011(usersssd01),30011(biggroup1)

Step 3: run command
     sudo -l
     // this command should show you which commands can be executed as root
     // with sudo

$ sudo -l
sudo: unable to resolve host ubuntu1404.example.test
[sudo] password for usersssd01:
Matching Defaults entries for usersssd01 on ubuntu1404:
    env_reset, mail_badpass,
    
secure_path=/usr/local/sbin\:/usr/local/bin\:/usr/sbin\:/usr/bin\:/sbin\:/bin

User usersssd01 may run the following commands on ubuntu1404:
    (root) /usr/bin/less, /usr/bin/vim

Step 4: If there weren't any problems then user will be able to run command.
     sudo some_command_listed_in_step3

$ sudo /usr/bin/less /etc/shadow | wc -l
21
$ echo $?
0

$ sudo apt-get install mc
Sorry, user usersssd01 is not allowed to execute '/usr/bin/apt-get install mc' 
as root on ubuntu.example.test.
$ echo $?
1


On 17-09-2014 16:54, Sanju A wrote:
Dear All,

I am able to configure the sudo settings in Centos clients by adding/modifying the entries in /etc/nsswitch.conf and /etc/sudo-ldap.conf. What is the exact steps for the configuration in Ubuntu as I am not able find the configuration file sudo-ldap.conf in Ubuntu.


Regards
Sanju Abraham
IS - Network/System Administrator
Tata Consultancy Services
TCS Centre SEZ Unit,
Infopark PO,
Kochi - 682042,Kerala
India
Ph:-   +91 484 6187490
Mailto: sanj...@tcs.com
Website: http://www.tcs.com <http://www.tcs.com/>
____________________________________________
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