1. Undo patch
mv new_filefolder old_filefolder
patch -RE -p0 < filename.patch
eg. $ mv linux-2.6.38.3 linux-2.6.38.3-sys
$ patch -RE -p0 < ltpb_ker.patch
2. 解壓縮時候由於系統時間不匹配出現錯誤：time stamp... is in the future.
解決方法: 只需加參數m即可。例如： tar -xvjf 變成 tar -xmvjf即可