Where can I find a Common Lisp for Linux?

The symbol type is common to Lisp languages, but largely unknown outside them. A symbol is a unique, named data object with several slots. Of these, value cell and function cell are the most important. Symbols in Lisp are often used similar to identifiers in other languages: to hold value of a variable; however there are many other uses. Normally, when a symbol is evaluated, its value is returned. Some symbols evaluate to themselves, for example all symbols in keyword package are self-evaluating. Boolean values in Common Lisp are represented by the self-evaluating symbols T and NIL.