Server stopped working after update to php 5.5.0

Question

I'm running nginx on ubuntu server 12.04 and I just updated to the most recent php package as follows http://phpave.com/upgrade-php-5-3-php-5-5-ubuntu-12-04-lts/#.Uzsho1RdURg.

In the final part of the installation I was asked if I wanted to substitute the conf file since the one on the server was different from the original and I agreed on that. Unfortunately I can't find the conf file in the server so I'd like to know where I can check it because the problem must be within it.

I've tried to service php5-fpm restart with nginx but it failed and returned the following message

Rejected send message, 1 matched rules; type="method_call", sender=":1.17" (uid=1000 pid=8013 comm="stop php5-fpm ") interface="com.ubuntu.Upstart0_6.Job" member="Stop" error name="(unset)" requested_reply="0" destination="com.ubuntu.Upstart" (uid=0 pid=1 comm="/sbin/init")

Whenever I load the server I get a 502 bad gateway. How can I check what is wrong with it?

Answer 1

When you upgrade packages and the config file differs from the existing one and you decide to replace the config, the old one is saved to a file with .dpkg-old extension. If you do not replace the config, the new config from the package is saved with .dpkg-dist extension.

So, you can search for your old config file with

find /etc -name '*.dpkg*'

command, and then you can see what has changed.

In general, you should check the differences between your current and distribution config files with the diff option in DPKG during upgrades. That way you can make an informed decision whether to upgrade the config file or not.