Recursively search for an exact string (disables regular expressions) in the current working directory

Recursively find patterns in files using regular expressions.
Equivalent to `grep -r`.
More information: <https://www.gnu.org/software/grep/manual/grep.html>.
Trick copyright: tl;dr; <https://github.com/tldr-pages/tldr>

rgrep --fixed-strings "{{exact_string}}"

click the source code to copy install rgrep on any operating system with command-not-found.com