如何grep -w可能会或可能不会出现在同一行中的2个单词？

Question

我需要两个命令的组合，有没有办法只grep一次？因为文件可能非常大，＆gt; 1gb

$ grep -w 'word1' infile
$ grep -w 'word2' infile

我不需要像grep for 2 words existing on the same line这样的行。我只需要避免整个文件的冗余迭代

Answer 1

使用它：

grep -E -w "word1|word2" infile

或

egrep -w "word1|word2" infile

它将匹配与word1，word2或两者匹配的行。

---

来自man grep：

   -E, --extended-regexp
          Interpret PATTERN as an extended regular expression (ERE, see below).

测试

$ cat file
The fish [ate] the bird.
[This is some] text.
Here is a number [1001] and another [1201].
$ grep -E -w "is|number" file
[This is some] text.
Here is a number [1001] and another [1201].