默认 upgrade 是更新非 cask 的应用，如果想全部更新，需要增加 2 个参数

brew update
brew upgrade --cask --greedy

默认使用 pecl 安装的 PHP 扩展是最新版本的，例如以下将安装 oci8-3.3.0

pecl install oci8

假如我们想安装 oci8-2.2.0 则需要需要使用以下的命令进行安装

pecl install oci8-2.2.0

dnf install https://rpms.remirepo.net/enterprise/remi-release-8.rpm
dnf module install php:remi-8.2
dnf install php

[root@rocky8 yum.repos.d]# php -v
PHP 8.2.11 (cli) (built: Sep 26 2023 11:11:58) (NTS gcc x86_64)
Copyright (c) The PHP Group
Zend Engine v4.2.11, Copyright (c) Zend Technologies
    with Zend OPcache v8.2.11, Copyright (c), by Zend Technologies

yum install conda
source /etc/profile.d/conda.sh

conda create -n python311 python=3.11
conda activate python311

当前 python 就变成 3.11 的环境了

sudo sed -i 's/archive.ubuntu.com/mirrors.ustc.edu.cn/g' /etc/apt/sources.list
sudo apt update
sudo apt install -y tasksel
sudo tasksel install ubuntu-desktop-minimal

然后正常重启就可以了

composer require php-mqtt/client

<?php
require __DIR__.'/vendor/autoload.php';

use PhpMqtt\Client\MqttClient;

$client = new MqttClient('127.0.0.1', 1883, 'client1');
$client->connect();
$client->publish('topic', 'Hello World!');
$client->disconnect();

<?php
require __DIR__.'/vendor/autoload.php';

use PhpMqtt\Client\MqttClient;

$client = new MqttClient('127.0.0.1', 1883, 'client2');
$client->connect();
$client->subscribe('topic', function($topic, $message) {
    echo $topic, $message, PHP_EOL;
});
$client->loop(true);
$client->disconnect();

brew install visual-studio-code

首先引入 MQTT 库：

<dependency>
  <groupId>org.eclipse.paho</groupId>
  <artifactId>org.eclipse.paho.client.mqttv3</artifactId>
  <version>1.2.5</version>
</dependency>

然后编写相应 Java 代码，MqttClient 中的第三个 null 参数非常重要，如果没有设置在 Linux 下会因为权限问题出错。

public static void main( String[] args ) throws MqttException {
    MqttClient client = new MqttClient("tcp://localhost:1883", "client1", null);
    client.connect();
    client.publish("topic1", new MqttMessage());
    client.disconnect();
}

通过 brew 安装 mosquitto，并启动

brew install mosquitto
mosquitto -v

打开终端订阅 topic1

mosquitto_sub -t topic1

打开新的终端往 topic1 发消息

mosquitto_pub -t topic1 -m "HelloWorld"

docker run -e KEYCLOAK_USER=admin -e KEYCLOAK_PASSWORD=admin -p 8080:8080 quay.io/keycloak/keycloak:14.0.0

使用浏览器访问 http://localhost:8080，用户名：admin，密码：admin 访问