在CentOs7上yum安装redis

#1.yum安装redis
yum install redis
#2.看到Nothing to do不要紧，只要先安装epel-release就好了。
yum install epel-release
#yum安装redis
yum install redis
#启动redis
systemctl start redis.service
#关闭redis
systemctl stop redis.service
#开机启动redis
systemctl enable redis