Count matching lines

bash

grep -c ERROR app.log

Explanation

Good for quick metrics and health checks in scripts.

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 Basic grep

Print lines containing a pattern.

Open In sheetbashsame section

Match regardless of uppercase or lowercase.

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Display line numbers with matches.

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Print lines that do not match.

Open In sheetbashsame section

Avoid partial substring matches.

Open In sheetbashsame section

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

Open In sheetbash1 tag match