What is the method for matching strings in Linux?

In Linux, the grep command can be used to match strings. This command is used to search for specified patterns in a file and print out the matching lines. The basic syntax is:

grep "pattern" file

Among them, pattern is the string to be matched, and file is the file to be searched.

For example, to search for lines containing the string “hello” in the file example.txt, you can use the following command:

grep "hello" example.txt

In addition to the grep command, you can also use other commands like awk, sed, etc. for string matching and processing.