我想学习clojure并通过Leiningen安装它。 启动失败[见下文]。
问题：如何开始Clojure？
详细说明： Xubuntu 14.04 LTS 64，java-1.7.0-openjdk-amd64 1071 /usr/lib/jvm/java-1.7.0-openjdk-amd64。
启动时的消息：
henk@henk-System-Product-Name:~$ lein repl
nREPL server started on port 46904 on host 127.0.0.1
REPL-y 0.3.0
Clojure 1.5.1
Docs: (doc function-name-here)
(find-doc "part-of-name-here")
Source: (source function-name-here)
Javadoc: (javadoc java-object-or-class-here)
Exit: Control+D or (exit) or (quit)
Results: Stored in vars *1, *2, *3, an exception in *e
user=> Exception in thread "Thread-4" java.io.FileNotFoundException: /home/henk/.lein /repl-port (Permission denied)
at java.io.FileOutputStream.open(Native Method)
at java.io.FileOutputStream.<init>(FileOutputStream.java:221)
at clojure.java.io$fn__8640.invoke(io.clj:234)
at clojure.java.io$fn__8564$G__8540__8571.invoke(io.clj:73)
at clojure.java.io$fn__8614.invoke(io.clj:170)
at clojure.java.io$fn__8590$G__8544__8597.invoke(io.clj:73)
at clojure.java.io$writer.doInvoke(io.clj:123)
at clojure.lang.RestFn.invoke(RestFn.java:410)
at clojure.lang.AFn.applyToHelper(AFn.java:161)
at clojure.lang.RestFn.applyTo(RestFn.java:132)
at clojure.core$apply.invoke(core.clj:619)
at clojure.core$spit.doInvoke(core.clj:6291)
at clojure.lang.RestFn.invoke(RestFn.java:425)
at user$eval540.invoke(NO_SOURCE_FILE:0)
at clojure.lang.Compiler.eval(Compiler.java:6619)
at clojure.lang.Compiler.eval(Compiler.java:6609)
at clojure.lang.Compiler.eval(Compiler.java:6582)
at clojure.core$eval.invoke(core.clj:2852)
at leiningen.core.eval$fn__3577.invoke(eval.clj:304)
at clojure.lang.MultiFn.invoke(MultiFn.java:231)
at leiningen.core.eval$eval_in_project.invoke(eval.clj:326)
at clojure.lang.AFn.applyToHelper(AFn.java:167)
at clojure.lang.AFn.applyTo(AFn.java:151)
at clojure.core$apply.invoke(core.clj:619)
at leiningen.repl$server$fn__7443.invoke(repl.clj:201)
at clojure.lang.AFn.applyToHelper(AFn.java:159)
at clojure.lang.AFn.applyTo(AFn.java:151)
at clojure.core$apply.invoke(core.clj:617)
at clojure.core$with_bindings_STAR_.doInvoke(core.clj:1788)
at clojure.lang.RestFn.invoke(RestFn.java:425)
at clojure.lang.AFn.applyToHelper(AFn.java:163)
at clojure.lang.RestFn.applyTo(RestFn.java:132)
at clojure.core$apply.invoke(core.clj:621)
at clojure.core$bound_fn_STAR_$fn__4102.doInvoke(core.clj:1810)
at clojure.lang.RestFn.invoke(RestFn.java:397)
at clojure.lang.AFn.run(AFn.java:24)
at java.lang.Thread.run(Thread.java:744)