我的Ubuntu 14.04中的Mosquitto安装

Question

I want to install Mosquitto in My Ubuntu 14.04 LTS

sudo apt-add-repository ppa:mosquitto-dev/mosquitto-ppa
sudo apt-get update
sudo apt-get install mosquitto-clients

but I have an error testing the installation:

devuser@localhost:~$ mosquitto_sub -t '$SYS/#' -v
Error: Connection refused

pinging the host from outside is fine:

ping 199.162.221.117
PING 199.162.221.117 (199.162.221.117): 56 data bytes
64 bytes from 199.162.221.117: icmp_seq=0 ttl=55 time=102.234 ms

but not

ping 199.162.221.117:1883
ping: cannot resolve 199.162.221.117:1883: Unknown host

also

devuser@localhost:~$ sudo start mosquitto
[sudo] password for devuser: 
start: Unknown job: mosquitto

also

devuser@localhost:~$ sudo /etc/init.d/mosquitto start
sudo: /etc/init.d/mosquitto: command not found

Answer 1

You have only installed the mosquitto command line clients (mosquitto_sub & mosquitto_pub) not the actual broker

$ sudo apt-get install mosquitto

That should install the actual broker which you will then be able to start with the last command you listed