ubuntu 利用 putty 執行 vi 會看到一堆亂碼

ubuntu 利用 putty 執行 vi 會看到一堆亂碼, 原因是因為ubuntu 預設支援顯示中文訊息,
採用 UTF-8 編碼, 所以 putty 預設的編碼會導致顯示的訊息為亂碼,
Change Settings -> Window -> Translation -> Receive data assumed to be in which character set 改成 UTF-8 (預設是use font encoding) 即可

另外也可以在 shell 裡執行
export LANG=C

How to disable the bell ring of putty?
Set the following option
Putty Configuration->Terminal->Bell->Set the style of bell->Action to happen when a bell occurs->None(Bell Disabled) (Originally was Make default system alert sound)