Grep: Find Which Files Contain a Keyword

Use the grep command to search within files for a keyword

grep -Ri my_keyword /directory/to_search/

grep "Aug 28 .*2015" /directory/to_search/file_to_search.log |more

Where:

1. Options Flag: - indicates that directive options will follow
2. Recursively Search: R read all files under the directory
3. Case Insensitive: i. Grep is case sensitive by default
4. Wildcard Notation: .* matches any character for any length
5. Fit Output to Screen: |more Pipe output “into more” and press Enter to see more results

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Reference:

1. Search for Apache’s ServerTokens Directive
2. Grep for text With Wildcard in between