Mac 下 软件安装路径查看 命令： Which， 估计Linux 也是

 ✘ marikobayashi@juk  ~  which git
/usr/bin/git
 marikobayashi@juk  ~  which maven
maven not found
 ✘ marikobayashi@juk  ~  which mvn
/usr/local/bin/mvn
 marikobayashi@juk  ~  which java
/usr/bin/java