常见程序示例

Question

是否有一些类似人的程序（或网站/书籍）可以向我展示常见工具使用的简单示例？

所以我可以在终端输入show-example grep它会输出

...

For matching multiple characters, use the asterisk. 
This example selects all words starting with 
"c" and ending in "h" from the system's dictionary:

  grep '\<c.*h\>' /usr/share/dict/words
      caliph
      cash
      catch
      cheesecloth
      cheetah
...