Something to bear in mind, however, is that "training wheels" are often available as "optional extras" for Linux software: They might not be obvious, but frequently they're available.

Take mplayer. You use it to play a video file by typing mplayer filename in a terminal. You fastforward & rewind using the arrow keys and the PageUp & PageDown keys. This is not overly "user-friendly". However, if you instead type gmplayer filename, you'll get the graphical frontend, with all its nice, friendly , familiar buttons.

Take ripping a CD to MP3 (or Ogg): Using the command-line, you need to use cdparanoia to rip the files to disc. Then you need an encoder. . . It's a hassle, even if you know exactly how to use the packages (imho). So download & install something like Grip. This is an easy-to-use graphical frontend that uses cdparanoia and encoders behind-the-scenes to make it really easy to rip CDs, and even has CDDB support to name the files automatically for you. 

The same goes for ripping DVDs: The number of options to pass to transcode is a bit of a nightmare. But using dvd::rip to talk to transcode for you makes the whole thing a simple, GUI-based process which anybody can do.

So to avoid #5b issues: Remember that "training wheels" tend to be bolt-on extras in Linux, rather than being automatically supplied with the main product. And sometimes, "training wheels" just can't be part of the design.

關于trainning wheels的問題。。。我個人比較贊同毛大牛的觀點
i.e. 我們要先最naive地走一遍，了解它究竟是如何工作的，then 我們可以使用各種輔助工具。
我以為，沒有必要每次重新發(fā)明一個輪子，但我個人比較傾向于先了解一下輪子是怎么做出來的。。。然后當然不會自己造輪子，而是使用最好用的輪子～～～我相信這無論是對我使用輪子還是在需要的時候?qū)喿幼龀鳇c小變動都是及其有幫助的。

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