sudo apt-get install likewise-open
Or you could download appropriate Script from here.
The main executable file of the likewise-open package is /usr/bin/domainjoin-cli, which is used to join your computer to the domain. Before you join a domain you will need to make sure you have:
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Access to an Active Directory user with appropriate rights to join the domain.
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The Fully Qualified Domain Name (FQDN) of the domain you want to join. If your AD domain does not match a valid domain such as example.com, it is likely that it has the form of domainname.local.
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DNS for the domain setup properly. In a production AD environment this should be the case. Proper Microsoft DNS is needed so that client workstations can determine the Active Directory domain is available.
To join a domain, from a terminal prompt enter:
sudo domainjoin-cli join example.com Administrator
See here for more details.
