Created
October 24, 2018 02:37
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| tail -f log.log | grep --line-buffer -E "keywords" | |
| grep 同时满足多个关键字和满足任意关键字 | |
| ① grep -E "word1|word2|word3" file.txt | |
| 满足任意条件（word1、word2和word3之一）将匹配。 | |
| ② grep word1 file.txt | grep word2 |grep word3 | |
| 必须同时满足三个条件（word1、word2和word3）才匹配 |
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