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1.使用github.com/nxadm/tail持续获取文件最新内容
2.njmon通过socket发送,接收json信息(与tail方式任一)
njmon值 http://nmon.sourceforge.net/pmwiki.php?n=Site.NjmonLinuxStatDetails
Exec("./njmon", "-s", "3", "-c", "1000")