Maude is a high-performance reflective language and system supporting both equational and rewriting logic specification and programming for a wide range of applications. Maude has been influenced in important ways by the OBJ3 language, which can be regarded as an equational logic sublanguage. Besides supporting equational specification and programming, Maude also supports rewriting logic computation. Because Maude needs some help for finding its own files, you may: - logout and login again, then run maude - run maude with explicit reference to its files' location $ MAUDE_LIB=/usr/share/maude/ maude - export the variable to the environment, then run maude $ export MAUDE_LIB=/usr/share/maude/ $ maude