Install W3c Validator on Ubuntu 11

gistfile1.txt

sudo  apt-get install w3c-markup-validator

nano /etc/w3c/validator.conf

# Whether private RFC1918 addresses are allowed.
Allow Private IPs = yes

<VirtualHost *:81>
    ServerAdmin [email protected]
    DocumentRoot /usr/share/w3c-markup-validator/html/
    ServerName localhost
     ScriptAlias /check /usr/lib/cgi-bin/w3c-markup-validator/check
    ErrorLog /var/log/apache2/validator.m2osw.com-error_log
    CustomLog /var/log/apache2/validator.m2osw.com-access_log combined
</VirtualHost>