Likewise Open

Likewise Open 是一个Linux、Unix、Mac OS 下的应用程序用来将这些系统的机器加入到 Windows 活动目录的安全认证。

主要功能：

1. joining non-Windows systems to Active Directory domains in a single step from the command line or from a GUI;
2. authenticating users with a single user name and password;
3. enforcing the same password policies for all platforms;
4. supporting multiple forests with one-way and two-way cross forest trusts;
5. caching credentials in case your domain controller goes down;
6. and providing single sign-on for SSH and Putty.