second copy数据备份软件实用技巧讲解 ... Synchronize file deletions also: 同步文件删除 Encryption: 这个选项只有在zip压缩时才有,可以通过加密来保护文件内容。 Keep last # versions of deleted files: 可以保存删除文件 ...
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字典的键天生是唯一的,所以可以用字典来删除文件的重复行,为了完成这项工作可以采用保存这些行的原始排序的方法。
The keys of a dictionary are inherently unique, so it's possible to use a dictionary to remove duplicate lines from a file, and to do so in a way that preserves the original ordering of those lines.
Linux的优点在于,它保存了文件的名称,甚至可以告诉我们它已经被删除。
Linux was nice in that it saved the name of the file and even told us it was deleted.
在你的home目录下练习使用vi,可以使用 vi 文件名创建一个 新文件,添加和删除文本,保存文件以及再次调用vi。
Practice with vi in your home directory by creating a newfile with vi filename andadding and deleting text, saving the file, and calling it up again.
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