CentOS7：This system is not registered to Red Hat Subscription Management

前序：安装jdk

1. 在官网下载jdk
   jdk-8u241-linux-i586.tar

2.通过SecureFX上传到/usr/local/jdk，并解压出来

3.配置JavaHome
vim /etc/profile

4. 测试java安装是否成功
   java -version
报错:-bash: /usr/local/jdk1.8.0_144/bin/java: /lib/ld-linux.so.2: bad ELF interpreter: 没有那个文件或目录

5.解决办法：
yum install glibc.i686

由此引出了主题:
This system is not registered to Red Hat Subscription Management

正文：通过yum安装软件时，报错This system is not registered to Red Hat Subscription Management。

• 以下是解决办法
  1.查看系统原来预装的yum
  rpm -qa|grep yum

卸载预装的yum
rpm -qa|grep yum|xargs rpm -e --nodeps
再次查看安装的yum情况
rpm -qa|grep yum

1. 去国内镜像下载以下的rpm安装包

2.查找的包有

[yum-metadata-parser-1.1.4-10.el7.x86_64.rpm](wget http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm) 

[yum-3.4.3-163.el7.centos.noarch.rpm](wget http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-3.4.3-163.el7.centos.noarch.rpm) 

[yum-plugin-fastestmirror-1.1.31-52.el7.noarch.rpm](wget http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-52.el7.noarch.rpm)

[python-urlgrabber-3.10-9.el7.noarch.rpm](wget http://mirrors.163.com/centos/7/os/x86_64/Packages/python-urlgrabber-3.10-9.el7.noarch.rpm) 

[python-iniparse-0.4-9.el7.noarch.rpm](wget http://mirrors.163.com/centos/7/os/x86_64/Packages/python-iniparse-0.4-9.el7.noarch.rpm)

下载完后

3.通过命令安装
rpm -ivh --nodeps -replasefiles xxx

4.安装完后，查询yum安装情况
rpm -qa|grep yum

5 配置CentOS镜像

//备份
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
//下载镜像配置文件
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
或
curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
//生成缓存
yum makecache 

报错：

6、编辑CenOS镜像配置文件
vim /etc/yum.repos.d/CentOS-Base.repo
把出现$releaserver的这个变量改成7

7. 重新 yum makecache

后序：回到检查jdk版本java -version出现的问题：
报错:-bash: /usr/local/jdk1.8.0_144/bin/java: /lib/ld-linux.so.2: bad ELF interpreter: 没有那个文件或目录

1.重新运行yum install glibc.i686，安装成功

2. 检查java -version