Show lines before a match

bash

grep -B 3 ERROR app.log

Explanation

Before-context is useful when logs explain the lead-up to an error.

Learn the surrounding workflow

Compare similar commands or jump into common fixes when this command is part of a bigger troubleshooting path.

Same sheet · prioritizing Context Around Matches

Print 5 lines after each match.

Open In sheetbashsame section

Print context on both sides of a match.

Open In sheetbashsame section

Print lines containing a pattern.

Open In sheetbash1 tag match

Enable `+`, `?`, and alternation without heavy escaping.

Open In sheetbash1 tag match

Search all files under a directory.

Open In sheetbash1 tag match

Match regardless of uppercase or lowercase.

Open In sheetbash1 tag match