How to match multiple keywords in Linux?

In Linux systems, you can use the grep command to match multiple keywords. The specific command format is as follows:

grep '关键字1\|关键字2\|关键字3' 文件名

The keywords to be matched are keyword1, keyword2, and keyword3, separated by a vertical bar (|). The file name is the file to be matched against.

For example, if you want to search for the keywords “apple”, “banana”, and “orange” in the file example.txt, you can use the following command:

grep 'apple\|banana\|orange' example.txt

This allows for multiple keywords to be matched simultaneously.