The xattr command lists, writes (sets), prints (displays), and deletes the extended attributes of file system objects. An extended attribute is a name:data (key:value) pairing arbitrarily associated with a file system object (e.g. file, directory, or symbolic link). The name of an extended attribute may be any null-terminated UTF-8 string. The data associated with it may be either textual or binary. This implementation of the xattr command is designed to be backwards-compatible with the Python script that shipped as /usr/bin/xattr in Mac OS 10.5.0 (Leopard).
Liferay is an enterprise portal. It handles users and portlet drawing, has a full administrative interface, supports all the major databases and the main J2EE application servers, and has single sign-on capabilities and multiple language support. It uses Apache Lucene for document searching. A number of portlets are included, including a guestbook, a calendar, a mapping utility which uses Expedia, news, polls, a document library, and live stock information.