I have installed squid on my debian 7 according to
https://www.digitalocean.com/community/tutorials/how-to-install-squid-proxy-on-ubuntu-12-10-x64

~# service squid3 start
squid3: unrecognized service
~# service squid start
[FAIL] Starting Squid HTTP proxy: squid failed!

How to start and stop and restart my squid ?