Apache

Header unset Server
 
ServerSignature Off
ServerTokens Prod

Redirect with htaccess

# permanent
Redirect 301 /google http://www.google.com/
# temporary
Redirect 302 /google http://www.google.com/
# redirent home
RewriteEngine On
RedirectMatch 301 ~.+ http://example.com/$0

User dir redirect

<IfModule mod_userdir.c>
    UserDir http://example.com~*/
</IfModule>

如果出現以下，

Invalid command 'SSLEngine', perhaps misspelled or defined by a module not included in the server configuration

表示 ssl module 沒有安裝或啟用

yum search apache ssl
yum install mod_ssl

確認 mode_ssl 有在 modules/mod_ssl.so

而且以下有在 conf.d/ssl.conf 中 LoadModule ssl_module modules/mod_ssl.so

啟用方式，以下指令會建立連結檔

a2enmod ssl
# ln -s /etc/apache2/mods-{available,enabled}/ssl.load; ln -s /etc/apache2/mods-{available,enabled}/ssl.conf

# http://serverfault.com/questions/389806/redirect-to-ssl-only-if-browser-supports-sni
RewriteEngine on
RewriteCond %{HTTP_USER_AGENT} !MSIE\ [5-8]
RewriteCond %{HTTP_USER_AGENT} !Android.*(Mobile)?\ [0-3]
RewriteRule ^ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]

ref:

http://unix.stackexchange.com/questions/124137/change-apache-httpd-server-http-header

https://donjajo.com/modify-apache-servertokens-custom-value-using-mod_security-module/