下午装了个linux，还没入门。 用VI写了个最简单的c程序，终端下输入gcc，总是提示bash:gcc:command not found。 怎么回事啊？ 有人说是路径的问题，如果是路径没设置，那我想知道gcc在哪，用什么命令能找到gcc的位置，怎样设置。 还有人说是没安装。

The shopt builtin offers 53 settings that can alter how bash behaves. Read this post and then refer to bash's man page to follow up on how these settings might work for you. If you haven’t tried it ...

While Linux systems install with thousands of commands, bash also supplies a large number of “built-ins”—commands that are not sitting in the file system as separate files, but are part of bash itself ...