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仅从文本中提取 IP

tag-icon • tag-icon regular-expression
仅从文本中提取 IP 
trans(776800911)[10.173.36.75]: Request processing failed: Network Error, from URL: 10.173.36.73:57743
trans(776800912)[10.173.36.75]: Request processing failed: Network Error, from URL: 10.173.36.74:57743
trans(776800913)[10.173.36.75]: Request processing failed: Network Error, from URL: 10.173.36.75:57743

答案1

$ grep -oP '\K[0-9.]+(?=:.*)' < ips.txt
10.173.36.73
10.173.36.74
10.173.36.75

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