CtagsInterface for Linux is a plug-in provides source code tagging functionality using the "Exuberant Ctags" tool. It automatically invokes Ctags on a list of projects (or source code trees) and keeps the tag information in a database. Features include going to the definition of the highlighted function (Jump to tag), browsing the tree of definitions (tags) of all project files (Tag Index browser), and provision of code completion suggestions. In addition, CtagsInterface for Linux provides a convenient API to access the tag index, so that the tag information can be shared with other plug-ins as well, and to eliminate the need for other plug-ins to interface with Ctags directly. CtagsInterface for Linux is configurable and can make use of all the information provided by Ctags. All tag extensions are indexed and made available to other plug-ins by the API.