centos7_kernel_update_5.4

yum update

yum upgrade 

 

rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org

yum install https://www.elrepo.org/elrepo-release-7.el7.elrepo.noarch.rpm

 

sudo yum --disablerepo="*" --enablerepo="elrepo-kernel" list available | grep kernel-lt

 

sudo yum --enablerepo=elrepo-kernel install kernel-lt

 

sudo yum -y --enablerepo=elrepo-kernel install kernel-lt-{devel,headers,perf} 

에러나면 skip 하고 진행

 

부팅시 디폴트 변경

vi /etc/default/grub time 변경 가능 해두되고 안해두됨 

 

sudo grub2-mkconfig -o /boot/grub2/grub.cfg

grep ^menuentry /boot/grub2/grub.cfg | cut -d "'" -f2

 

grub2-set-default "CentOS Linux (5.4.~~~~버전확인하고 진행) 7 (Core)"