探索 OS X 系统中的 Unix 命令行世界
1. Unix 命令行初体验：文件下载与查看
在 OS X 系统中，借助 Unix 命令行可以实现强大的功能。以从 O’Reilly Media 的 FTP 存档下载文件为例，以下是具体操作过程：
230-Welcome to the O'Reilly Media, Inc. FTP Archive. Local date and time: Mon Apr 23 23:04:14 2012 --> Hello 71.237.2.63 <-- --> There are 2 users out of 100 allowed in your usage class. <-- Check us out on the web at http://oreilly.com 230 Anonymous access granted, restrictions apply Remote system type is UNIX. Using binary mode to transfer files. ftp> cd /pub/graphics/book-covers/low-res 250 CWD command successful ftp> get 9781449332310.gif local: 0596009151.gif remote: 0596009151.gif 229 Entering Extended Passive Mode (|||62244|) 150 Opening BINARY mode data connection for 05
