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Jenkins comes preinstalled with plugins for CVS and Subversion. Other version control systems are supported by plugins that you can download from the Manage Plugins screen.
Subversion needs no special configuration, since Jenkins uses native Java libraries to interact with Subversion repositories. If you need to authenticate to connect to a repository, Jenkins will prompt you when you enter the Subversion URL in the build job configuration.
CVS needs little or no configuration. By default, Jenkins will look for tools like CVS on the system path, though you can provide the path explicitly if it isn’t on the system path. CVS keeps login and password details in a file called .cvspass, which is usually in your home directory. If this is not the case, you can provide a path where Jenkins can find this file.