新装的centos 6.9虚拟机
修改yum 服务器源
cd /etc/yum.repos.d/
rename repo repo.bak_$(date +%F) *
阿里的yum库 https://opsx.alibaba.com/mirror 打开点帮助
curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo
curl -o /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-6.repo
yum install -y tree lrzsz ntpdate wget vim
chkconfig --list | grep "3:on"
rpm -Uvh http://repo.mysql.com/yum/mysql-5.6-community/el/6/x86_64/mysql-community-release-el6-5.noarch.rpm
mysql_install_db
mysql_secure_installation
vim /etc/my.cnf
cd /var/lib/
chown -R mysql:mysql mysql
> /var/log/mysqld.log
tail -f /var/log/mysqld.log
/etc/init.d/iptables status
chkconfig --list | grep "3:on"
curl -o /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-6.repo
rpm -Uvh http://repo.mysql.com/yum/mysql-5.6-community/el/6/x86_64/mysql-community-release-el6-5.noarch.rpm
yum install -y mysql mysql-server
openjdk
第一步：执行 rpm -qa|grep jdk 命令查看当前的jdk情况。
第二步：执行 yum -y remove java java-1.7.0-openjdk* 卸载openjdk，在执行这个命令的过程中，会卸载删除一些和openJDK有依赖关系的软件，不用担心，无影响。
https://opsx.alibaba.com/mirror 查找要安装的版本
yum list | grep jdk 查看所有包
安装devel
yum install -y java-1.8.0-openjdk-devel