mosquitto_sub:tldr:08657
mosquitto_sub: Subscribe to multiple topics matching a given pattern. (+ takes any metric name).
$ mosquitto_sub -t ${sensors-machines-+-temperature-+}
try on your machine
The command you provided is used to subscribe to a specific topic in the MQTT protocol using the "mosquitto_sub" tool. Here's a breakdown of the individual components:
mosquitto_sub: This is the command to start the MQTT subscriber.-t: This flag specifies the topic to subscribe to.${sensors-machines-+-temperature-+}: This is the topic name, represented by a variable surrounded by${}. The actual value of the variable is not provided in the command.
In MQTT, topics are used to categorize and route messages. They follow a hierarchical structure using a forward slash / as a delimiter. Each level of the topic can contain alphanumeric characters, hyphens, or plus signs.
This explanation was created by an AI. In most cases those are correct. But please always be careful and
never run a command you are not sure if it is safe.