[...] # Specify which IP address to listen on. The default is to listen on all IP addresses # This parameter is one of the only security measures that memcached has, so make sure # it's listening on a firewalled interface. # -l 12.34.56.78 -l 127.0.0.1 [...]
XCache is an opcode cacher for PHP developed by the Lighttpd team. The full description directly from http://xcache.lighttpd.net/
XCache is a fast, stable PHP opcode cacher that has been tested and is now running on production servers under high load. It is tested (on linux) and supported on all of the latest PHP cvs branches such as PHP_4_3 PHP_4_4 PHP_5_0 PHP_5_1 PHP_5_2 HEAD(6.x). ThreadSafe/Windows is also supported. It overcomes a lot of problems that has been with other competing opcachers such as being able to be used with new PHP versions. See Introduction for more information.
There is no XCache package within the apt repositories for Debian Etch, however it is available within Debian SID/Testing. You will need to then download the source, compile it and install it. You can download the 1.2 stable source from the following here: