problem resolved by
create .htaccess file under the root directory of the html folder
vi .htaccess (copy below content then save, restart httpd)
AddType text/x-component .htc
#BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ – [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
# END WordPress
at the WP admin panel, setup the pamalink to custom by add %postname
