nginx introduced dynamic module support in v. 1.9.11. This brief article provides step-by-step procedure to enable GeoIP support on your CentOS server.
This is is "random" image generated using PHP rand() function:
And this is an image base on true random generator:
(Having a true random number is extremely important in cryptography, simulations and so on)
(this article is a work in progress). My own advice will be added later...
Having a system that regularly writes parameters to the EEPROM can wear out the EEPROM, since it is only guaranteed to endure 100 k erase/write cycles. Writing the parameters to a circular buffer in EEPROM where each of the elements in the buffer can endure 100 k erase/write cycles can circumvent this. However, if the system is exposed to RESET conditions, such as power failures, the system needs to be able to identify the correct position in the circular buffer again. This document describes how to make safe high endurance parameter storage in EEPROM/
Read more: http://www.atmel.com/images/doc2526.pdf
If you run nginx on Windows (for development purproses, for instance), you may often experience 'An existing connection was forcibly closed by the remote host' errors.
To get rid of them, add the following lines to your nginx.conf:
keepalive_timeout 65; keepalive_requests 500; proxy_http_version 1.1;