因為目錄下有很多檔案，而且我欲排除的檔案可能正在被使用，所以不能mv。

最後找到這樣的命令：

Linux下除了某個檔案外的其他檔案全部刪除，最簡單的方法是

# shopt -s extglob

# rm -fr !(file1)

     If the extglob shell option is enabled using the shopt builtin, several extended pattern matching operators are recognized.  In the follow-
       ing description, a pattern-list is a list of one or more patterns separated by a |.  Composite patterns may be formed using one or more  of
       the following sub-patterns:

              ?(pattern-list)
                     Matches zero or one occurrence of the given patterns
              *(pattern-list)
                     Matches zero or more occurrences of the given patterns
              +(pattern-list)
                     Matches one or more occurrences of the given patterns
              @(pattern-list)
                     Matches one of the given patterns
              !(pattern-list)
                     Matches anything except one of the given patterns
 

更多用法可見：