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centos7

1. 在线安装jdk1.8

   1. yum install -y java-1.8.0-openjdk.x86_64
      java默认安装路径/usr/lib/jvm/；
      加入环境变量配置，在/etc/profile 配置文件中加入 java 环境变量：
      vim /etc/profile
      ​
      #java 环境变量内容：
      ​
      #java环境变量
      export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.362.b08-1.el7_9.x86_64
      export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JAVA_HOME/jre/lib/rt.jar
      export PATH=$PATH:$JAVA_HOME/bin
      source /etc/profile
      java -version

2. 安装tomcat

   1. yum -y install tomcat
      #进入/etc/profile 配置文件
      vim /etc/profile
      ​
      #Tomcat 环境变量内容：
      ​
      #tomcat环境变量
      COMCAT_BASE=/usr/share/tomcat
      COMCAT_HOME=/usr/share/tomcat
      export JAVA_HOME PATH CLASSPATH COMCAT_BASE COMCAT_HOME
      source /etc/profile
      systemctl start tomcat.service
      systemctl status tomcat
      ​
      systemctl status firewalld
      ​
      #执行命令来开启8080端口
      firewall-cmd --permanent --zone=public --add-port=8080/tcp
      ​
      #重启防火墙
      firewall-cmd --reload
      ​
      #验证开启的8080端口是否生效
      firewall-cmd --zone=public --query-port=8080/tcp
      解决FirewallD警告问题
      vi /etc/firewalld/firewalld.conf
      #重启tomcat:
      systemctl restart tomcat
      ​
      #查看tomcat状态：
      systemctl status tomcat
      尝试解决打不开8080的问题
      #下载依赖包
      yum install tomcat-webapps tomcat-admin-webapps
      ​
      #关闭防火墙 
      systemctl stop firewalld
      ​
      #查看防火墙状态
      systemctl status firewalld
      #Tomcat的自启动
      systemctl enable tomcat.service
      ​
      #系统重启
      reboot
      ​

3. mysql8

   1. #下载mysql8.0的rpm仓库源
      wget https://repo.mysql.com/mysql80-community-release-el7.rpm
      ​
      #安装mysql8.0源
      yum -y install ./mysql80-community-release-el7.rpm
      ​
      #生成yum索引缓存，并查看目录大小
      yum makecache fast
      ​
      #查看正在使用的MySQL repo
      yum repolist all|grep mysql
      ​
      #安装MySQL8.0
      yum install -y mysql-community-common mysql-community-libs mysql-community-libs-compat mysql-community-client mysql-community-server
      ​
      #设置 mysql 开机启动
      systemctl enable mysqld
      ​
      #启动mysql
      systemctl start mysqld
      ​
      cat /var/log/mysqld.log | grep password
      ​
      mysql_secure_installation
      ​
      #随机密码登录
      mysql -uroot -p
      ​
      ​
      #先把root的旧密码置空
      use mysql;
      #备注：Mysql5.7+ password字段 已改成 authentication_string字段
      update user set authentication_string='' where user='root';
      ​
      #重置成新密码
      #备注：Mysql8.0修改密码方式已有变化（此处是个坑，需要注意）
      ​
      #Mysql8.0之前;
      update user set password=password('root') where user='root';
      #Mysql8.0之后；
      alter user 'root'@'localhost' identified by 'root';
      ​
      #显示密码策略
      SHOW VARIABLES LIKE 'validate_password%';
      #校验密码不能等同于用户名
      set global validate_password.check_user_name=OFF;
      #设置最低长度为4
      set global validate_password.length=4;
      #校验设置低级别策略
      set global validate_password.policy=LOW;
      ​
      #显示密码策略
      SHOW VARIABLES LIKE 'validate_password%';
      ​
      ​
      #设置完密码策略后重新输入修改命令，更改后的密码为123456
      alter user 'root'@'localhost' identified by '123456';
      ​
      #退出命令行
      mysql> quit;
      Bye
      ​
      #新密码登录
      mysql -uroot -p123456
      ​
      ​
      #停止服务
      systemctl stop mysqld
      #重启服务
      systemctl restart mysqld
      #查看mysql服务
      systemctl status mysqld
      ​

4. nginx

   1. yum install yum-utils
      #新建nginx.repo
      vim /etc/yum.repos.d/nginx.repo
      ​
      #nginx.repo内容
      [nginx-stable]
      name=nginx stable repo
      baseurl=http://nginx.org/packages/centos/$releasever/$basearch/
      gpgcheck=1
      enabled=1
      gpgkey=https://nginx.org/keys/nginx_signing.key
      module_hotfixes=true
      ​
      [nginx-mainline]
      name=nginx mainline repo
      baseurl=http://nginx.org/packages/mainline/centos/$releasever/$basearch/
      gpgcheck=1
      enabled=0
      gpgkey=https://nginx.org/keys/nginx_signing.key
      module_hotfixes=true
      yum-config-manager --enable nginx-mainline
      ​
      yum install -y nginx
      ​
      systemctl start nginx.service
      ​
      systemctl status nginx
      ​
      #查看防火墙状态
      systemctl status firewalld
      ​
      #执行命令来开启80端口
      firewall-cmd --permanent --zone=public --add-port=80/tcp
      ​
      #重启防火墙
      firewall-cmd --reload
      ​
      #验证开启的8080端口是否生效
      firewall-cmd --zone=public --query-port=80/tcp
      ​
      systemctl enable nginx.service

5. docker

   1. 一、安装依赖包
      ​
      [root@localhost ~]# yum install -y yum-utils device-mapper-persistent-data lvm2
      ​
      二、设置yum仓库地址
      ​
      [root@localhost ~]# sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
      ​
      [root@localhost ~]# sudo yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
      ​
      三、更新Yum缓存
      ​
      [root@localhost ~]# sudo yum makecache fast
      ​
      四、在线安装docker
      ​
      [root@localhost ~]# sudo yum install -y docker-ce docker-ce-cli containerd.io
      ​
      五、查看docker信息
      ​
      [root@localhost ~]# docker info
      ​
      Client:
      ​
      Context: default
      ​
      Debug Mode: false
      ​
      Plugins:
      ​
      app: Docker App (Docker Inc., v0.9.1-beta3)
      ​
      buildx: Docker Buildx (Docker Inc., v0.10.0-docker)
      ​
      scan: Docker Scan (Docker Inc., v0.23.0)
      ​
      Server:
      ​
      ERROR: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?
      ​
      docker尚未启动，报错
      ​
      六、启动docker
      ​
      [root@localhost ~]# systemctl start docker
      ​
      七、docker状态
      ​
      [root@localhost ~]# systemctl status docker
      ​
      docker.service - Docker Application Container Engine
      ​
      Loaded: loaded (/usr/lib/systemd/system/docker.service; disabled; vendor preset: disabled)
      ​
      Active: active (running) since 四 2023-01-26 19:24:36 CST; 12s ago
      ​
      Docs: https://docs.docker.com
      ​
      Main PID: 6284 (dockerd)
      ​
      Tasks: 8
      ​
      Memory: 108.1M
      ​
      CGroup: /system.slice/docker.service
      ​
      └─6284 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock
      ​
      八、docker开机启动
      ​
      [root@localhost ~]# systemctl enable docker
      ​
      九、修改镜像默认存储路径
      ​
      查看当前存储路径
      ​
      [root@localhost /]# docker info | grep "Docker Root Dir"
      ​
      Docker Root Dir: /var/lib/docker
      ​
      创建新路径
      ​
      [root@localhost docker]# mkdir -p /data/docker
      ​
      停止服务
      ​
      [root@localhost /]# systemctl stop docker
      ​
      Warning: Stopping docker.service, but it can still be activated by:
      ​
      docker.socket
      ​
      [root@localhost /]# systemctl stop docker.socket
      ​
      reload配置文件
      ​
      [root@localhost /]# systemctl daemon-reload
      ​
      重启服务
      ​
      [root@localhost /]# systemctl restart docker.service
      ​
      查看本地镜像存储修改结果
      ​
      [root@localhost /]# docker info | grep "Docker"
      ​
      app: Docker App (Docker Inc., v0.9.1-beta3)
      ​
      buildx: Docker Buildx (Docker Inc., v0.10.0-docker)
      ​
      scan: Docker Scan (Docker Inc., v0.23.0)
      ​
      Docker Root Dir: /data/docker