Finding occurances of a string within a given input.
grep <pattern> <input>
grep -rl "string" <directory>
Recursively search through all files for matches of a specific string.
`grep -i “string”
Search for a string and dont care about case
`grep -B3 -A3 “string”
Search for string and also include 3 lines before, 3 lines after
grep -oP "regex"
Returns all matches for a give Regex.