LinkChecker – Check websites for broken links

LinkChecker is a free, GPL licensed website validator. LinkChecker checks links in web documents or full websites.

Features

recursive and multithreaded checking and site crawling
output in colored or normal text, HTML, SQL, CSV, XML or a sitemap graph in different formats
HTTP/1.1, HTTPS, FTP, mailto:, news:, nntp:, Telnet and local file links support
restriction of link checking with regular expression filters for URLs
proxy support
username/password authorization for HTTP and FTP and Telnet
honors robots.txt exclusion protocol
Cookie support
HTML5 support
HTML and CSS syntax check
Antivirus check
Different interfaces: command line, GUI and web interface

Install LinkChecker in ubuntu

First you need to download linkchecker-gui .deb package from here once you have deb package you install by double clicking on it.

Screenshot



Source : http://www.ubuntugeek.com/linkchecker-check-websites-for-broken-links.html