上面这个命令需要针对要还原的每个文件系统分别执行。
The above command needs to be run for each file system being restored.
逻辑备份管理——为各备份创建时间戳，这样即可操纵要还原的映像。
Logical backup management - Timestamp for each backup is created so that the image to be restored can be manipulated.
要还原一个或多个文件，可以使用带提取开关(- x)的tar命令。
To restore a file or files, the tar command is used with the extract switch (-x).
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