How to perform a fuzzy search for file contents in Linux?

In Linux, you can use the grep command to search for content in files using vague patterns. The grep command is used to search for specific string patterns in files and print out the matching lines.

Here is the grammar.

grep [options] pattern [file...]

“其中，[option] is an optional parameter, pattern is the string pattern to search, and [file…] is the path of the file to be searched.”

For example, to search for lines containing the keyword in a file named example.txt, you can use the following command:

grep 'keyword' example.txt

To search case-insensitively, you can use the -i option.

grep -i 'keyword' example.txt

You can use the -B and -A options to display a certain number of lines before or after matching lines.

grep -B 2 'keyword' example.txt  # 显示匹配行之前2行
grep -A 2 'keyword' example.txt  # 显示匹配行之后2行

You can use the -n option to display the line numbers of matching lines.

grep -n 'keyword' example.txt

The above are some common grep command options, for more options refer to the grep command documentation.