升级前
当前内核版本: 4.19.90-17.ky10.x86_64
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执行步骤
download and install new kernel
wget https://mirrors.aliyun.com/elrepo/kernel/el7/x86_64/RPMS/kernel-lt-5.4.92-1.el7.elrepo.x86_64.rpm
yum localinstall -y kernel-lt-5.4.92-1.el7.elrepo.x86_64.rpm
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## change default kernel
grep ^menuentry /boot/grub2/grub.cfg | cut -d "'" -f2
cp /etc/grub2.cfg{,.bak-$(date +%F)}
grub2-set-default 5.4.191-1.el7.elrepo.x86_64
grub2-mkconfig -o /boot/grub2/grub.cfg
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check & reboot
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grub2-editenv list
shutdown -r
升级后
升级后内核版本: 5.4.92-1.el7.elrepo.x86_64
uname -r
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