解決Ubuntu上使用vi編輯時，方向鍵及倒退鍵(Backspace)操作失常的問題

在Ubuntu上使用vi編輯器編輯時，有時會發現方向鍵和倒退鍵(Backspace)會失常。

如上圖

在vi的輸入模式(inser mode)時：

1.輸入方向鍵會出現ABCD

2.倒退刪除鍵(Backspace)緅作用

此時，我們可以在家目錄底下，新增檔案「.vimrc」，在檔案中加入下列2行內容：

set nocompatible set backspace=2

記得存檔後離開

接著再使用vi編輯器時便可正常使用方向鍵和倒退鍵(Backspace)了。

喔賣尬!原來這就是vi 的 h j k l (左下上右鍵) 的由來^______^"

Here is why vim uses the hjkl keys as arrow keys

I was reading about vim the other day and found out why it used hjkl keys as arrow keys. When Bill Joycreated the vi text editor he used the ADM-3A terminal, which had the arrows on hjkl keys. Naturally he reused the same keys and the rest is history!

Here is how the hjkl keys looked:

ADM-3A keyboard's hjkl keys with arrows.

And here is the whole terminal that vi was created on:

Lear Siegler's ADM-3A computer terminal.

Since vim is derived from vi, it uses the same hjkl keys.

And while we're at it, notice where the ESC key is positioned:

Lear Siegler's ADM-3A computer terminal's full keyboard.

That's why the ESC is used to change between vi modes! Because it's so close and easy to reach.

Also ever wondered why home directory is ~ in UNIX? Look at the HOME key in upper right corner!

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I just got a deal with Teespring for a hjkl t-shirt! Teespring is like kickstarter for t-shirts. If at least 30 people commit to buy the shirt the deal goes through and everyone gets the shirt. Otherwise nothing happens.

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資料來源：http://www.catonmat.net/blog/why-vim-uses-hjkl-as-arrow-keys/