This is a message broker that supports version 5.0, 3.1.1, and 3.1 of the MQTT protocol. MQTT provides a method of carrying out messaging using a publish/subscribe model. It is lightweight, both in terms of bandwidth usage and ease of implementation. This makes it particularly useful at the edge of the network where a sensor or other simple device may be implemented using an arduino for example.
By default mosquitto will be installed as a system service, using the default configuration at /snap/mosquitto/current/default_config.conf. If this does not meet your needs, create the file /var/snap/mosquitto/common/mosquitto.conf and this will be used instead. Note that only files inside /var/snap/mosquitto/common can be read by mosquitto, you cannot put other configuration files in /etc/mosquitto.
In addition to the latest channel, there are also the 1.5 and 1.6 channels which you can use to track those versions.
Snaps are applications packaged with all their dependencies to run on all popular Linux distributions from a single build. They update automatically and roll back gracefully.
Snaps are discoverable and installable from the Snap Store, an app store with an audience of millions.
Snap is available for Linux Mint 18.2 (Sonya), Linux Mint 18.3 (Sylvia), Linux Mint 19 (Tara), Linux Mint 19.1 (Tessa) and the latest release, Linux Mint 20 (Ulyana).
You can find out which version of Linux Mint you’re running by opening System info from the Preferences menu.
On Linux Mint 20, /etc/apt/preferences.d/nosnap.pref needs to be removed before Snap can be installed. This can be accomplished from the command line: