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# opensnoop
> 跟踪系统中打开的文件标识符。
- 输出当前系统内被打开的所有文件：
`sudo opensnoop`
- 跟踪给定进程名，打开的所有文件：
`sudo opensnoop -n {{进程名}}`
- 跟踪给定 PID（进程号），打开的所有文件：
`sudo opensnoop -p {{PID 进程号}}`
- 跟踪打开了指定文件的继承：
`sudo opensnoop -f {{路径 / 文件}}`