ripgrep Basics

rg TODO

# Search for a pattern using ripgrep's recursive defaults.

rg FIXME src/

# Limit the search to one directory or file.

rg -n 'apiKey' config/

# Display matching lines with line numbers.

rg -i 'authorization' .

# Match regardless of letter case.

rg -S 'userId' src/

# Lowercase patterns search case-insensitively; uppercase triggers case-sensitive search.

rg -l 'useEffect' app/

# Return matching file paths without printing the matching lines.

rg -L 'Copyright 2026' .

# Find files that do not contain a pattern.

rg -c 'console\.log' src/

# Show how many matches exist in each file.

rg -c 'ERROR' app.log

# Suppress file names and count matches across stdin or a small target.

rg --type-list | less

# Print ripgrep's known type definitions.

git diff --cached | rg '^\+'

# Use ripgrep in a pipeline.

journalctl -u nginx --since today | rg -i 'timeout|error'

# Filter live or recent command output with rg.

fd . src | rg '/tests?/'

# Use another command to produce candidate text and rg to filter it.

printf 'alpha\0beta\0gamma\0' | rg -z 'beta'

# Search data that uses NUL delimiters instead of newlines.

rg --json 'panic!' src/

# Use structured output for editor integrations and automation.