# lychee > Find broken URLs. > More information: . - Scan a website for broken links: `lychee {{https://example.com}}` - Display a breakdown of error types: `lychee --format detailed {{https://example.com}}` - Limit the amount of connections to prevent DDOS protection: `lychee --max-concurrency {{5}} {{links.txt}}` - Check files in a directory structure for any broken URLs: `grep -r "{{pattern}}" | lychee -` - Display help: `lychee --help`