这命令有多个选项，您可以选择进行完整备份或增量备份，脱机备份或联机备份。

You have several options for these commands to enable you to do full or incremental backups, either offline or online.

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将它与 exec() 命令一起使用可以将结果保存到一个数组中，这允许您构建一个 HTML 表或表单，它们又进一步允许您运行其他命令。

Using this in concert with the exec() command and dumping the results to an array allows you to build an HTML table or form that then allows you to run other commands.

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在 vi 中，可以使用 / 命令搜索字符串，这需要以字面字符串或正则表达式的形式指定要匹配的模式。

You can search for strings in vi using the / command, specifying the pattern to match either as a literal string or as a regular expression.

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