As long as you can think, there are always some ".el" files waiting for you on the Internet, you can easily find them, and the good news is emacs enable you use svn, cvs directly, it will automatically recognize the version-ed files and you can use simple commands(key strikes) to update, commit and add files to your repository.
The most often used commands of svn:

And the corresbonding key strokes:

The only thing to do is to open these files with emacs:
For example:

will checkout the files from a svn server, and emacs will recognize them automatically.

The above link is available, and can be checked out with svn.

It is necessary to start a new frame in emacs so that the emacs will keep a single input stream for all the frames. The command to use is C-x 5 2, or File->New Frame.
After creating a new frame, bind the short key for switching the frame.

Recently, I learned about a programming-friendly font named M+, and I want to use it in emacs, the following steps should be done to do this:

In .emacs file, add/modify the following line:

Open file in remote machine:

When the files changed in remote directory, it is likely that emacs tramp will not be able to stay synchronized with the latest change, that means, the command c-x c-f will not find the newly added files or directories. In this case, the ido auto-complete should be refreshed, using the following command:

The eshell tries to provide the simple operations of a standard shell like bash, but it lacks some basic functions like input redirection, so I changed the eshell to multi-term in my configure file.

  ;;目的是开一个shell的小buffer，用于更方便地测试程序(也就是运行程序了)，我经常会用到。
;;f8就是另开一个buffer然后打开shell，C-f8则是在当前的buffer打开shell,shift+f8清空eshell
(defun open-eshell-other-buffer ()
  "Open eshell in other buffer"
  (interactive)
  (split-window-vertically)
  (eshell))
;;I changed the eshell to multi-term, because multi-term is much more functional than eshell
(defun open-term-other-buffer ()
  "Open eshell in other buffer"
  (interactive)
  (split-window-vertically)
  (multi-term))