fgrep

Matches patterns in files. Supports simple patterns and regular expressions.

• Search for an exact string in a file:

fgrep {{search_string}} {{path/to/file}}

• Search only lines that match entirely in files:

fgrep -x {{path/to/file1}} {{path/to/file2}}

• Count the number of lines that match the given string in a file:

fgrep -c {{search_string}} {{path/to/file}}

• Show the line number in the file along with the line matched:

fgrep -n {{search_string}} {{path/to/file}}

• Display all lines except those that contain the given regular expression:

fgrep -v {{^regex$}} {{path/to/file}}

• Display filenames whose content matches the regular expression at least once:

fgrep -l {{^regex$}} {{path/to/file1}} {{path/to/file2}}