Xdebug php5.6 is not installed, what to do?

Question

linux

Installing Xdebug Gives
sudo apt-get install php5-xdebug
me an error

Err http://ppa.launchpad.net/ondrej/php5-5.6/ubuntu/ trusty/main php5-xdebug amd64 2.3.2-1+deb.sury.org~trusty+1
  404  Not Found
E: Failed to fetch http://ppa.launchpad.net/ondrej/php5-5.6/ubuntu/pool/main/x/xdebug/php5-xdebug_2.3.2-1+deb.sury.org~trusty+1_amd64.deb  404  Not Found

Can anyone come across, tell me what to do, or in which direction to look

Answer 1

In general, thank you all, the issue was resolved! I understand that my application source is outdated, but by the way
apt-get update did not help;
I found the solution on the forum, it looks like this:
sudo ppa-purge ppa:ondrej/php5-5.6

Answer 2

your local package database is outdated, update it.
apt-get update && apt-get install php5-xdebug