方法一:yum安装

1. 安装redis4/5版本通过IUS存储库(仅支持redhat/centos)

• 1. 安装 epel repo
  yum install -y epel-release bash-completion

• 安装 IUS repo

1. 社群版( 可能不行, 可以用下吗的官网版 )
   yum install -y https://centos7.iuscommunity.org/ius-release.rpm
2. 官网版语法
   yum install -y https://repo.ius.io/ius-release-el7.rpm https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm

• 安装 redis5
  yum install -y redis5

• 启动redis
  systemctl start redis

  打开Redis客户端，使用命令：redis-cli 即可打开客户端

  [root@hadoop0 ~]# redis-cli
  127.0.0.1:6379> 

   编辑配置文件

  vim /etc/redis.conf

// 服务状态
systemctl status redis

// 服务启动
 systemctl start redis

// 服务停止
systemctl stop redis

// 服务重启
systemctl restart redis

//设置为开机启动
systemctl enable redis

方法二: wget安装

安装目录: /usr/local/redis

1.获取redis资源
    cd /usr/local/redis
    wget http://download.redis.io/releases/redis-4.0.8.tar.gz


2.解压
    tar xzvf redis-4.0.8.tar.gz


3.安装
    cd redis-4.0.8
    make
    cd src
    make install PREFIX=/usr/local/redis



4.移动配置文件到安装目录下
    cd ../
    mkdir /usr/local/redis/etc
    mv redis.conf /usr/local/redis/etc



5. 配置redis为后台启动
    vim /usr/local/redis/etc/redis.conf //将daemonize no 改成daemonize yes



6.将redis加入到开机启动
    vim /etc/rc.local  //在里面添加内容：/usr/local/redis/bin/redis-server /usr/local/redis/etc/redis.conf (意思就是开机调用这段开启redis的命令)



7.开启/关闭redis
    /usr/local/redis/bin/redis-server /usr/local/redis/etc/redis.conf