The IT environment today in any organization is a sort of a mixture where many different Operating Systems are used, and Windows Active Domain Controller exists in majority of such organization.

Below is a 4 step How to on "Connecting Linux (Ubuntu) Systems to Active Directory Setup"

1) Update the Software Repositories

sudo apt-get update

2) Install Required Packages (likewise-open)

sudo apt-get install likewise-open


3) Join The Domain using Domain Administrator Account, replace Administrator with Domain Administrator Username and fqdn..domain with the Fully Qualified Domain Name

sudo domainjoin-cli join fqdn.domain Administrator


4) Update the Startup Scripts

sudo update-rc.d likewise-open defaults
sudo /etc/init.d/likewise-open start


Thats it !! you have now joined the Domain, Log Off or preferably Restart the Machine.

Now you can login using Active Directory Credentials remember appending DOMAIN\ before your username


User Name to Login : DOMAIN\username
Password: domainpassword


This will also create a home Directory for Domain Users under /home/DOMAIN