grep

•   grep command examples
  

Search for a given string in a file (case in-sensitive search).

$ grep -i "the" demo_file

Print the matched line, along with the 3 lines after it.

$ grep -A 3 -i "example" demo_text

Search for a given string in all files recursively

• $ grep -r "linuxcare" *

More grep examples: Get a Grip on the Grep! – 15 Practical Grep Command Examples