A summary of the implementation of Htaccess 301 redirection in Linux systems.

Be sure to back up the. htaccess file in the corresponding directory before you set 301 redirection. htaccess 301 Turn settings are limited to Linux hosts and need to support the virtual host, the last time you tried redirecting domain.com to www.domain.com, it really took effect immediately.

1. redirect domain.com to www.domain.com

This redirect is designed to make the domain name unique, is the website SEO must do, the back redirects www.domain.com to domain.com is also for the same reason, but the form is different. Open the. htaccess file and add the following rules. (The following rule is for the primary domain name, and the subdomain is to be modified)

The code is as follows	Copy Code
Rewriteengine on Rewritecond%{http_host}!^www.domain.com$ [NC] Rewriterule ^ (. *) $ http://www.domain.com/$1 [l,r=301]

2. redirect www.domain.com to domain.com

The code is as follows	Copy Code
Rewriteengine on Rewritecond%{http_host}!^domain.com$ [NC] Rewriterule ^ (. *) $ http://domain.com/$1 [l,r=301]

3. REDIRECT olddomain.com to www.newdomain.com

The code is as follows	Copy Code
Rewriteengine on Rewritecond%{http_host}!olddomain.com$ [NC] Rewriterule ^ (. *) $ http://www.newdomain.com/$1 [l,r=301]

4. redirect olddomain.com to newdomain.com

The code is as follows	Copy Code
Rewriteengine on Rewritebase/ Rewritecond%{http_host}!olddomain.com$ [NC] Rewriterule ^ (. *) $ http://newdomain.com/$1 [l,r=301]

5. redirect domain.com/file/file.php to otherdomain.com/otherfile/other.php

The code is as follows	Copy Code
Rewritecond%{http_host} ^www.domain.com$ Rewriterule ^file/file.php$ http://www.otherdomain.com/otherfile/other.php [r=301,l]

If it is a win host, see if your host supports redirection. If supported, your name file is: Httpd.ini, the code is:

code is as follows	copy code
[Isapi_ Rewrite] Cacheclockrate 3600 Repeatlimit Rewriteengine on Rewritecond Host: ^nantongzufang.com$ R Ewriterule (. *) http://www.nantongzufang.com$1 [i,r]