title: 500 Internal server error in magento and admin pages
body: <p>I just changed the URL values on core_config_data (since its someone else's repo) to my own URL </p>
  
  <p>but after a while the page located on my VM no longer loads. </p>
  
  <p>According to firebug console:</p>
  
  <pre><code>"NetworkError: 500 Internal Server Error 
  </code></pre>
  
  <p>Even admin pages cannot be accessed. Already made sure folders are rewritable by:</p>
  
  <pre><code>chmod 777 app/etc/
  
  chmod -R 777 media/ var/
  </code></pre>
  
  <p>also tried moving the .htaccess from Magento home directory to other directories but same error happens. </p>
  
  <p>VHOST</p>
  
  <p>My vhost looks like this:</p>
  
  <pre><code>&lt;VirtualHost *:80&gt;
      ServerAdmin webmaster@dummy-host.example.com
      DocumentRoot "/usr/docs/dummy-host.example.com"
      ServerName dummy-host.example.com
      ServerAlias www.dummy-host.example.com
      ErrorLog "/private/var/log/apache2/dummy-host.example.com-error_log"
      CustomLog "/private/var/log/apache2/dummy-host.example.com-access_log" common
  &lt;/VirtualHost&gt;
  
  &lt;VirtualHost *:80&gt;
      ServerAdmin webmaster@dummy-host2.example.com
      DocumentRoot "/usr/docs/dummy-host2.example.com"
      ServerName dummy-host2.example.com
      ErrorLog "/private/var/log/apache2/dummy-host2.example.com-error_log"
      CustomLog "/private/var/log/apache2/dummy-host2.example.com-access_log" common
  &lt;/VirtualHost&gt;
  </code></pre>
  
  <p>.HTACCESS:</p>
  
  <pre><code>############################################
  ## uncomment these lines for CGI mode
  ## make sure to specify the correct cgi php binary file name
  ## it might be /cgi-bin/php-cgi
  
  #    Action php5-cgi /cgi-bin/php5-cgi
  #    AddHandler php5-cgi .php
  
  ############################################
  ## GoDaddy specific options
  
  #   Options -MultiViews
  
  ## you might also need to add this line to php.ini
  ##     cgi.fix_pathinfo = 1
  ## if it still doesn't work, rename php.ini to php5.ini
  
  ############################################
  ## this line is specific for 1and1 hosting
  
      #AddType x-mapp-php5 .php
      #AddHandler x-mapp-php5 .php
  
  ############################################
  ## default index file
  
      DirectoryIndex index.php
  
  &lt;IfModule mod_php5.c&gt;
  
  ############################################
  ## adjust memory limit
  
  #    php_value memory_limit 64M
      php_value memory_limit 256M
      php_value max_execution_time 18000
  
  ############################################
  ## disable magic quotes for php request vars
  
      php_flag magic_quotes_gpc off
  
  ############################################
  ## disable automatic session start
  ## before autoload was initialized
  
      php_flag session.auto_start off
  
  ############################################
  ## enable resulting html compression
  
      #php_flag zlib.output_compression on
  
  ###########################################
  # disable user agent verification to not break multiple image upload
  
      php_flag suhosin.session.cryptua off
  
  ###########################################
  # turn off compatibility with PHP4 when dealing with objects
  
      php_flag zend.ze1_compatibility_mode Off
  
  &lt;/IfModule&gt;
  
  &lt;IfModule mod_security.c&gt;
  ###########################################
  # disable POST processing to not break multiple image upload
  
      SecFilterEngine Off
      SecFilterScanPOST Off
  &lt;/IfModule&gt;
  
  &lt;IfModule mod_deflate.c&gt;
  
  ############################################
  ## enable apache served files compression
  ## http://developer.yahoo.com/performance/rules.html#gzip
  
      # Insert filter on all content
      ###SetOutputFilter DEFLATE
      # Insert filter on selected content types only
      #AddOutputFilterByType DEFLATE text/html text/plain text/xml text/css text/javascript
  
      # Netscape 4.x has some problems...
      #BrowserMatch ^Mozilla/4 gzip-only-text/html
  
      # Netscape 4.06-4.08 have some more problems
      #BrowserMatch ^Mozilla/4\.0[678] no-gzip
  
      # MSIE masquerades as Netscape, but it is fine
      #BrowserMatch \bMSIE !no-gzip !gzip-only-text/html
  
      # Don't compress images
      #SetEnvIfNoCase Request_URI \.(?:gif|jpe?g|png)$ no-gzip dont-vary
  
      # Make sure proxies don't deliver the wrong content
      #Header append Vary User-Agent env=!dont-vary
  
  &lt;/IfModule&gt;
  
  &lt;IfModule mod_ssl.c&gt;
  
  ############################################
  ## make HTTPS env vars available for CGI mode
  
      SSLOptions StdEnvVars
  
  &lt;/IfModule&gt;
  
  &lt;IfModule mod_rewrite.c&gt;
  
  ############################################
  ## enable rewrites
  
     # Options +FollowSymLinks
      RewriteEngine on
  
  ############################################
  ## you can put here your magento root folder
  ## path relative to web root
  
      #RewriteBase /magento/
  
  ############################################
  ## uncomment next line to enable light API calls processing
  
  #    RewriteRule ^api/([a-z][0-9a-z_]+)/?$ api.php?type=$1 [QSA,L]
  
  ############################################
  ## rewrite API2 calls to api.php (by now it is REST only)
  
      RewriteRule ^api/rest api.php?type=rest [QSA,L]
  
  ############################################
  ## workaround for HTTP authorization
  ## in CGI environment
  
      RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
  
  ############################################
  ## TRACE and TRACK HTTP methods disabled to prevent XSS attacks
  
      RewriteCond %{REQUEST_METHOD} ^TRAC[EK]
      RewriteRule .* - [L,R=405]
  
  ############################################
  ## redirect for mobile user agents
  
      #RewriteCond %{REQUEST_URI} !^/mobiledirectoryhere/.*$
      #RewriteCond %{HTTP_USER_AGENT} "android|blackberry|ipad|iphone|ipod|iemobile|opera mobile|palmos|webos|googlebot-mobile" [NC]
      #RewriteRule ^(.*)$ /mobiledirectoryhere/ [L,R=302]
  
  ############################################
  ## always send 404 on missing files in these folders
  
      RewriteCond %{REQUEST_URI} !^/(media|skin|js)/
  
  ############################################
  ## never rewrite for existing files, directories and links
  
      RewriteCond %{REQUEST_FILENAME} !-f
      RewriteCond %{REQUEST_FILENAME} !-d
      RewriteCond %{REQUEST_FILENAME} !-l
  
  ############################################
  ## rewrite everything else to index.php
  
      RewriteRule .* index.php [L]
  
  &lt;/IfModule&gt;
  
  
  ############################################
  ## Prevent character encoding issues from server overrides
  ## If you still have problems, use the second line instead
  
      AddDefaultCharset Off
      #AddDefaultCharset UTF-8
  
  &lt;IfModule mod_expires.c&gt;
  
  ############################################
  ## Add default Expires header
  ## http://developer.yahoo.com/performance/rules.html#expires
  
      ExpiresDefault "access plus 1 year"
  
  &lt;/IfModule&gt;
  
  ############################################
  ## By default allow all access
  
      Order allow,deny
      Allow from all
  
  ###########################################
  ## Deny access to release notes to prevent disclosure of the installed Magento version
  
      &lt;Files RELEASE_NOTES.txt&gt;
          order allow,deny
          deny from all
      &lt;/Files&gt;
  
  ############################################
  ## If running in cluster environment, uncomment this
  ## http://developer.yahoo.com/performance/rules.html#etags
  
      #FileETag none
  </code></pre>
  
  <p>Kindly advise what should I do? Thanks</p>