#subscription-manager register --username=little__life --password=soumxh280126 --auto-attach
#subscription-manager list
一、删除RHN注册和订阅提示
查找subscription-manager相关组件:
rpm -qa|grep subscription-manager
删除subscription-manager相关组件：
sudo yum remove subscription-manager
查找rhn相关组件:
rpm -qa|grep rhn
删除rhn相关组件:
sudo yum remove rhn-check
yum install epel-release
yum install ntfs-3g
grub2-mkconfig -o /boot/grub2/grub.conf
查看系统可用内核
cat /boot/grub2/grub.cfg |grep menuentry
修改开机时默认使用的内核
grub2-set-default ‘CentOS Linux (3.10.0-327.22.2.el7.x86_64) 7 (Core)’
查看内核修改结果
grub2-editenv list
查看当前内核
uname -r
查看系统安装了哪些内核包
rpm -qa |grep kernel
使用yum remove 或rpm -e 删除无用内核
yum remove kernel-3.10.0-327.el7.x86_64