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$ sudo apt-cache search memcache

php5-memcache - memcache extension module for PHP5

php5-memcached - memcached extension module for PHP5, uses libmemcached

memcachedb - Persistent storage engine using the memcache protocol 

SET GLOBAL innodb_file_per_table=1;

SET GLOBAL innodb_file_format=Barracuda; 

• Antelope is the original InnoDB file format, which previously did not have a name. It supports COMPACT and REDUNDANT row formats for InnoDB tables and is the default file format in MySQL 5.6 to ensure maximum compatibility with earlier MySQL versions that do not support the Barracuda file format.

• Barracuda is the newest file format. It supports all InnoDB row formats including the newer COMPRESSED and DYNAMIC row formats. The features associated with COMPRESSED and DYNAMIC row formats include compressed tables, efficient storage of off-page columns, and index key prefixes up to 3072 bytes (innodb_large_prefix). See Section 14.11, “InnoDB Row Storage and Row Formats”. 

Options -MultiViews

RewriteEngine On

Options -Indexes

RewriteCond %{REQUEST_FILENAME} !-d

RewriteCond %{REQUEST_FILENAME} !-f

RewriteCond %{REQUEST_FILENAME} !-l

 [perdir /var/www/html/arch/test/] add path info postfix: /var/www/html/arch/test/board -> /var/www/html/arch/test/board/, referer: http://localhost/arch/test/board/

 [perdir /var/www/html/arch/test/] strip per-dir prefix: /var/www/html/arch/test/board/ -> board/, referer: http://localhost/arch/test/board/

 [perdir /var/www/html/arch/test/] applying pattern '^(.+)$' to uri 'board/', referer: http://localhost/arch/test/board/

 [perdir /var/www/html/arch/test/] rewrite 'board/' -> 'index.php?url=board/', referer: http://localhost/arch/test/board/

 split uri=index.php?url=board/ -> uri=index.php, args=url=board/, referer: http://localhost/arch/test/board/

 [perdir /var/www/html/arch/test/] add per-dir prefix: index.php -> /var/www/html/arch/test/index.php, referer: http://localhost/arch/test/board/

 [perdir /var/www/html/arch/test/] strip document_root prefix: /var/www/html/arch/test/index.php -> /arch/test/index.php, referer: http://localhost/arch/test/board/

 [perdir /var/www/html/arch/test/] internal redirect with /arch/test/index.php [INTERNAL REDIRECT], referer: http://localhost/arch/test/board/

 [perdir /var/www/html/arch/test/] strip per-dir prefix: /var/www/html/arch/test/index.php -> index.php, referer: http://localhost/arch/test/board/

 [perdir /var/www/html/arch/test/] applying pattern '^(.+)$' to uri 'index.php', referer: http://localhost/arch/test/board/

 [perdir /var/www/html/arch/test/] pass through /var/www/html/arch/test/index.php, referer: http://localhost/arch/test/board/

 [perdir /var/www/html/arch/test/] strip per-dir prefix: /var/www/html/arch/test/public/css/style.css -> public/css/style.css, referer: http://localhost/arch/test/board/

 [perdir /var/www/html/arch/test/] applying pattern '^(.+)$' to uri 'public/css/style.css', referer: http://localhost/arch/test/board/

 [perdir /var/www/html/arch/test/] pass through /var/www/html/arch/test/public/css/style.css, referer: http://localhost/arch/test/board/ 

REQUEST_FILENAME

The full local filesystem path to the file or script matching the request, if this has already been determined by the server at the time REQUEST_FILENAME is referenced. Otherwise, such as when used in virtual host context, the same value as REQUEST_URI. Depending on the value of AcceptPathInfo, the server may have only used some leading components of the REQUEST_URI to map the request to a file.

REQUEST_URI

The path component of the requested URI, such as "/index.html". This notably excludes the query string which is available as its own variable named QUERY_STRING.

Filename should give you the complete local path, where request uri will be exactly what was requested (should also include the GET parameters). From the manual:

REQUEST_URI

The resource requested in the HTTP request line. (In the example above, this would be "/index.html".)

REQUEST_FILENAME

The full local filesystem path to the file or script matching the request. 

[Wed Apr 12 09:14:03.530865 2017] [core:alert] [pid 30981] [client 0.0.0.0:3628] /var/www/html/arch/test/.htaccess: LogLevel not allowed here 

LogLevel alert rewrite:trace3

RewriteEngine on

RewriteLog /path/to/log

RewriteLogLevel 5 

$ cd /etc/apache2/mods-enabled

$ sudo ln -s ../mods-available/rewrite.load rewrite.load