Update grep.md (#327)
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@ -119,6 +119,12 @@ line.
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grep -c "text" file_name
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grep -c "text" file_name
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```
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```
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搜索命令行历史记录中 输入过 `git` 命令的记录:
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```shell
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history | grep git
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```
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输出包含匹配字符串的行数 **-n** 选项:
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输出包含匹配字符串的行数 **-n** 选项:
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```shell
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```shell
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