[SOLVED] Grep log within a time range

Issue

I want to grep log between 13:27:45 - 13:28:00, I managed to grep log between 13:27 - 13:28 with the command grep '^13:2[7-8] logfilename, but how can I grep 13:27:45 - 13:28:00?

Would you recommend using sed or even awk for such operation?

Solution

To match the format 13:27:45 - 13:28:00

grep "^13:\(27:\(4[5-9]\|5[0-9]\)\|28:00\)" file

Or

grep -E "^13:(27:(4[5-9]|5[0-9])|28:00)" file

Explanation

• ^ Start of string
• 13: Match literally
• ( Start a group for the alternatioms
  • 27: Match literally
  • (4[5-9]|5[0-9]) Match 45 - 49 or 50 - 59
  • | Or
  • 28:00 Match literally
• ) Close the group

Answered By - The fourth bird

Answer Checked By - David Goodson (WPSolving Volunteer)