安裝

sudo apt install mosquitto mosquitto-clients

安裝完成后，直接運(yùn)行mosquitto顯示

bash: mosquitto: 未找到命令

按照AI說(shuō)明
``bash
sudo find /usr -name "mosquitto*" -type f -executable 2>/dev/null
/usr/bin/mosquitto_rr
/usr/bin/mosquitto_pub
/usr/bin/mosquitto_passwd
/usr/bin/mosquitto_ctrl
/usr/bin/mosquitto_sub
/usr/sbin/mosquitto

找到可執(zhí)行文件在`/usr/sbin/mosquitto`
再通過(guò)查看主配置文件
```bash
sudo cat /etc/mosquitto/mosquitto.conf
# Place your local configuration in /etc/mosquitto/conf.d/
...
include_dir /etc/mosquitto/conf.d

查到自定義配置存放在/etc/mosquitto/conf.d/路徑下
在 conf.d 目錄下創(chuàng)建一個(gè)新配置文件，啟用 WebSocket

sudo nano /etc/mosquitto/conf.d/websockets.conf

復(fù)制

# 啟用 WebSocket 支持
listener 9001
protocol websockets

# 可選：也保留 TCP 支持（非必須）
listener 1883

重啟 Mosquitto 服務(wù)

sudo systemctl restart mosquitto

查看狀態(tài)

sudo systemctl status mosquitto

確認(rèn)端口監(jiān)聽(tīng)

ss -tuln | grep 9001

tcp 0 0 0.0.0.0:9001 0.0.0.0:* LISTEN

訂閱主題測(cè)試

mosquitto_sub -h localhost -p 1883 -t 'test/topic'

再開(kāi)個(gè)終端發(fā)布消息

mosquitto_pub -h localhost -p 1883 -t 'test/topic' -m 'Hello from MQTT!'

坑=============

連接被拒

mosquitto_sub -h localhost -p 1883 -t 'test/topic'
Connection error: Connection Refused: not authorised.

設(shè)置允許匿名連接(已測(cè)試)
配置文件

sudo nano /etc/mosquitto/conf.d/anonymous.conf

添加內(nèi)容

# 允許匿名訪問(wèn)（僅用于測(cè)試）
allow_anonymous true

重啟服務(wù)

sudo systemctl restart mosquitto

啟用用戶(hù)名密碼認(rèn)證（未測(cè)試）

sudo mosquitto_passwd -c /etc/mosquitto/passwd youruser

創(chuàng)建認(rèn)證配置

sudo nano /etc/mosquitto/conf.d/auth.conf

內(nèi)容

allow_anonymous false
password_file /etc/mosquitto/passwd

重啟服務(wù)

sudo systemctl restart mosquitto

測(cè)試

mosquitto_sub -h localhost -p 1883 -t 'test/topic' -u youruser -P yourpassword