正確管道輸入到grep和在其上對位執行正則表達式和匹配的字符串

Question

我有一個腳本，輸出以下輸出：

總體狀態 - 行（採樣週期9秒） - 物理驅動器名稱=」 0 C：「（OK）_PercentIdleTime = 100％_PercentBusyTime = 0％ _PercentDiskTime = 1％_PercentDiskReadTime = 0％_PercentDiskWriteTime = 1％_DiskReadBytesPersec = 0.000B/sec _DiskReadsPersec = 0.000/sec _DiskWriteBytesPersec = 0.00MB/sec，_DiskWritesPersec = 8.000/sec，CurrentDiskQueueLength = 0，_AvgDiskQueueLength = 0.0，_AvgDiskReadQueueLength = 0.0，_AvgDiskWriteQueueLength = 0.0 |'_PercentIdleTime0 C：'= 100; '_PercentBusyTime0 C：'= 0; '_PercentDiskTime0 C：'= 1; '_PercentDiskReadTime0 C：'= 0; '_PercentDiskWriteTime0 C：'= 1; '_DiskReadBytesPersec0 C：'= 0; '_DiskReadsPersec0 C：'= 0; '_DiskWriteBytesPersec0 C：'= 71917; '_DiskWritesPersec0 C：'= 8; 'CurrentDiskQueueLength0 C：'= 0; '_AvgDiskQueueLength0 C：'= 0.0; '_AvgDiskReadQueueLength0 C：'= 0.0; '_AvgDiskWriteQueueLength0 C：'= 0.0;

使用grep我想過濾掉一切，但_DiskWriteBytesPersec = 0.00MB

我用下面的正則表達式上http://regexr.com/成功地這樣做： （_DiskWriteBytesPersec =（\ d *）？ 。（\ d *）MB）

但我很難讓它與grep一起工作。

Answer 1

問題與你的正則表達式是(_DiskWriteBytesPersec=(\d*)?.(\d*)MB)，它不支持\d而不是使用[0-9]，你可以試試這個，它會正常工作。

echo "Overall Status - OK (Sample Period 9 sec) - Physical Drive Name="0 C:" (OK) - _PercentIdleTime=100%, _PercentBusyTime=0%, _PercentDiskTime=1%, _PercentDiskReadTime=0%, _PercentDiskWriteTime=1%, _DiskReadBytesPersec=0.000B/sec, _DiskReadsPersec=0.000/sec, _DiskWriteBytesPersec=0.00MB/sec, _DiskWritesPersec=8.000/sec, CurrentDiskQueueLength=0, _AvgDiskQueueLength=0.0, _AvgDiskReadQueueLength=0.0, _AvgDiskWriteQueueLength=0.0|'_PercentIdleTime0 C:'=100; '_PercentBusyTime0 C:'=0; '_PercentDiskTime0 C:'=1; '_PercentDiskReadTime0 C:'=0; '_PercentDiskWriteTime0 C:'=1; '_DiskReadBytesPersec0 C:'=0; '_DiskReadsPersec0 C:'=0; '_DiskWriteBytesPersec0 C:'=71917; '_DiskWritesPersec0 C:'=8; 'CurrentDiskQueueLength0 C:'=0; '_AvgDiskQueueLength0 C:'=0.0; '_AvgDiskReadQueueLength0 C:'=0.0; '_AvgDiskWriteQueueLength0 C:'=0.0;" | grep -Eo "_DiskWriteBytesPersec=[0-9]*?.[0-9]+MB"; 

管與grep -Eo "_DiskWriteBytesPersec=[0-9]*?.[0-9]+MB"

命令輸出的輸出：_DiskWriteBytesPersec=0.00MB

E的擴展正則表達式。

2.O僅輸出匹配的字符串。