1SUB(1)                                                                  SUB(1)
2
3
4

NAME

6       sub - subscribe to MQTT topics
7

SYNOPSIS

9       sub [OPTIONS]
10

DESCRIPTION

12       sub connects to the given MQTT broker and subscribes to all topics
13       specified. Messages received on a topic are printed to stdout, prefixed
14       with the topic the message was received on.
15
16       All options can be passed either as command-line arguments or can be
17       specified in a simple config file.
18

OPTIONS

20       -broker URL
21           broker address (should be in the form of a URL)
22
23       -ca-root FILE
24           path to a FILE containing CA certificates (optional)
25
26       -cert-file FILE
27           authenticate with a certificate
28
29       -clean
30           discard any pending messages from the broker (default true)
31
32       -client-id STRING
33           unique identifier for this client (defaults to a semi-random
34           string)
35
36       -config FILE
37           path to FILE containing configuration values (optional)
38
39       -header KEY=VALUE
40           set an HTTP header (in KEY=VALUE form) (can be specified multiple
41           times)
42
43       -key-file FILE
44           authenticate with a private key
45
46       -password STRING
47           authenticate with a password
48
49       -qos INTEGER
50           quality of service for messages
51
52       -topic STRING
53           topic to publish or subscribe to (can be specified multiple times)
54
55       -username STRING
56           authenticate with a username
57
58       -verbose
59           increase output
60

CONFIGURATION

62       Any option may be specified as a value in a configuration file instead
63       of (or in addition to) a command-line option. Values present on the
64       command-line take precedent over values in the configration file. Thus
65       it is easy to create a base configration file that can be augmented
66       easily at run time.
67
68       The configuration file takes the form of a simple space-separated
69       "option value" format (i.e. "broker tcp://test.mosquitto.org:1883").
70

EXAMPLES

72       Connect to a broker anonymously and subscribe to two topics.
73
74           sub -broker tcp://test.mosquitto.org:1883 -topic mqttcli/pubtest -topic mqttcli/pubtest1
75
76       Connect to a broker using username/password authentication and
77       subscribe to a topic.
78
79           sub -broker tcp://test.mosquitto.org:1884 -username ro -password readonly -topic mqttcli/pubtest
80

AUTHOR

82       Link Dupont <link@sub-pop.net>
83           Author.
84
85
86
87                                  06/18/2022                            SUB(1)