Linux 如何从文件中“grep”读取模式？
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How to make "grep" read patterns from a file?
提问by Michael
Suppose there is a large text file and I would like to print only the lines that do not match some patterns. Obviously, I can use egrep -v 'patter1|pattern2|pattern3. Now what if all those patterns are in a text file ? What is the best way to make egrepread patterns from the file ?
假设有一个大文本文件，我只想打印与某些模式不匹配的行。显然，我可以使用egrep -v 'patter1|pattern2|pattern3. 现在如果所有这些模式都在一个文本文件中呢？egrep从文件中读取模式的最佳方法是什么？
采纳答案by TMS
grep -v -f pattern_file
回答by Ernest Friedman-Hill
egrep has an -foption which does exactly that: you specify a file, and it reads patterns from that file, one per line.
egrep 有一个-f选项可以做到这一点：您指定一个文件，它从该文件中读取模式，每行一个。
