What this template solves
Use this delete-matching-lines template when a file contains repeated noise lines you want to remove fast, such as DEBUG logs, comments, or generated markers.
Open the workspace with this template preloaded, then refine it for your own file and text pattern.
Sample input
INFO start
DEBUG detail
WARN retryPrompt to start from
Delete lines that contain DEBUG
Expected command
sed '/DEBUG/d'Tags
filterlogspatterndelete-lines
Best for
- Delete DEBUG lines from application logs before sharing them.
- Remove generated markers or boilerplate rows from exports.
- Strip repeated comment lines from config snapshots.
How to use this template
- 1Pick the repeated string or pattern that identifies the lines to delete.
- 2Copy the delete-matching-lines sed command or open it in AskSed for refinement.
- 3Preview the filtered result on sample text, then use the native file-edit form on macOS or Linux.
Template FAQ
How do I delete lines that contain a repeated keyword with sed?
A command like `sed '/DEBUG/d'` removes every line that matches the pattern. This template is useful for delete-lines workflows such as removing DEBUG logs, generated markers, or repeated boilerplate rows.
Is delete-matching-lines a good fit for cleaning logs before sharing them?
Yes. It is one of the most common sed cleanup patterns because you can strip noisy rows quickly while keeping the rest of the log structure intact for review or debugging.
Related templates
Explore nearby sed workflows that target similar replace, cleanup, filtering, or rewrite tasks.