Question

命令：

pi@raspberrypi:~ $ mosquitto
1566609792: mosquitto version 1.5.7 starting
1566609792: Using default config.
1566609792: Opening ipv4 listen socket on port 1883.
1566609792: Error: Address already in use

可以调用

启动蚊子。是否有更好的单个命令可以验证代理是否正在运行。 I would like to avoid using using pub and sub commands to test并使用简单的查询命令。我还想避免使用mosquitto命令来确定安装是否处于活动状态/正在运行

Answer 1

假设您使用apt-get安装了mosquitto，那么它将被设置为systemd服务，因此：

service mosquitto status

将显示它是否正在运行：

● mosquitto.service - LSB: mosquitto MQTT v3.1 message broker
   Loaded: loaded (/etc/init.d/mosquitto; generated; vendor preset: enabled)
   Active: active (running) since Mon 2019-08-12 22:39:38 BST; 1 weeks 4 days ag
     Docs: man:systemd-sysv-generator(8)
  Process: 32183 ExecStop=/etc/init.d/mosquitto stop (code=exited, status=0/SUCC
  Process: 32220 ExecStart=/etc/init.d/mosquitto start (code=exited, status=0/SU
      CPU: 8min 53.255s
   CGroup: /system.slice/mosquitto.service
           └─32226 /usr/sbin/mosquitto -c /etc/mosquitto/mosquitto.conf

否则仅使用ps将显示该进程是否正在运行：

$ ps -efc | grep mosquitto
mosquit+ 32226     1 TS   19 Aug12 ?        00:08:53 /usr/sbin/mosquitto -c /etc/mosquitto/mosquitto.conf

蚊子（MQTT）服务烟雾测试

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