If the htaccess AllOverwrite is disabled, Apache will throw up a 500 Internal Server Error
Enable htaccesss AllOverwrite by editing the following file on the webserver:
vi /etc/httpd/conf/httpd.conf
#Add or edit the line to look like this
AllowOverride AuthConfig Indexes Limit All
Frequently Used .htaccess Directives in Apache
# Force www
RewriteEngine On
RewriteCond %{HTTP_HOST} !^www.domain\.com$ [NC]
RewriteRule (.*) http://www.domain.com/$1 [R=301,L]
or
RewriteRule ^(.*)$ http://www.domain.com/$0 [R=301,L]
# Add mod-rewrite rules (if needed)
# This checks if a file or directory exists before calling the var
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
# This sends the var to the PHP file
RewriteRule ^([A-Za-z0-9_-]+) http://www.domain.com/foo/bar/get.php?var=$0 [PT]
# Disable and turn off PHP register globals
php_flag register_globals OFF
# Enable PHP errors
php_flag display_errors ON
# Disable directory listing
IndexIgnore *
# Override common PHP settings
php_value post_max_size 16M
php_value upload_max_filesize 20M
php_value memory_limit 25M
php_value max_execution_time 900
php_value session.gc_maxlifetime 7200
# Hide the directory indexes
Options All -Indexes
# Show the directory indexes
Options All +Indexes
# Disable access and prevent viewing of htaccess
opentag Files .htaccess closetag
order allow,deny
deny from all
opentag /Files closetag
Alternatively,
CHMOD .htaccess to 644 or RW-R--R--
# Disallow or prevent hotlinking of images, photos or any other file type
RewriteEngine on
RewriteCond %{HTTP_REFERER} !^$
RewriteCond %{HTTP_REFERER} !^http://(www\.)?domain.com/.*$ [NC]
RewriteRule \.(gif|jpg)$ - [F]
# Redirect an old path to a new one
# Redirect an old file to a new file
Redirect /old-dir/foo.html http://www.domain.com/foo/new.html
# Redirect an old directory to a new directory
Redirect /old-dir/ http://www.domain.com/new-dir/
# Set the default index file
DirectoryIndex index.html
or
# Set multiple files as the default if the first doesn't exist
DirectoryIndex index1.html index2.php index3.shtml foo.htm
# Block or ban offline browsers or leechers
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} ^wget [OR]
RewriteCond %{HTTP_USER_AGENT} ^flashget [OR]
RewriteCond %{HTTP_USER_AGENT} ^getright
RewriteRule ^.* - [F,L]
# Ban traffic from a single or multiple domains
RewriteEngine on
# Options +FollowSymlinks
RewriteCond %{HTTP_REFERER} foo\.com [NC]
RewriteRule .* - [F]
or
RewriteEngine on
# Options +FollowSymlinks
RewriteCond %{HTTP_REFERER} foo1\.com [NC,OR]
RewriteCond %{HTTP_REFERER} foo2\.com
RewriteRule .* - [F]
