查看一共有几个内核
[root@localhost ~]# rpm -qa | grep kernel-core
kernel-core-5.14.0-687.12.1.el9_8.x86_64
kernel-core-5.14.0-687.15.1.el9_8.x86_64
kernel-core-5.14.0-687.17.1.el9_8.x86_64
现在在用的内核
[root@localhost ~]# uname -r
5.14.0-687.12.1.el9_8.x86_64
查看有几个启动项
[root@localhost ~]# sudo grubby --info=ALL | grep kernel
kernel="/boot/vmlinuz-5.14.0-687.17.1.el9_8.x86_64"args="ro console=ttyS0,115200n8 no_timer_check net.ifnames=0 crashkernel=1G-2G:192M,2G-64G:256M,64G-:512M $tuned_params"
kernel="/boot/vmlinuz-5.14.0-687.15.1.el9_8.x86_64"args="ro console=ttyS0,115200n8 no_timer_check net.ifnames=0 crashkernel=1G-4G:192M,4G-64G:256M,64G-:512M $tuned_params"
kernel="/boot/vmlinuz-5.14.0-687.12.1.el9_8.x86_64"args="ro console=ttyS0,115200n8 no_timer_check net.ifnames=0 crashkernel=1G-2G:192M,2G-64G:256M,64G-:512M $tuned_params"
kernel="/boot/vmlinuz-0-rescue-7677130562a64cecafbb1cd64587d33d"args="ro console=ttyS0,115200n8 no_timer_check net.ifnames=0 crashkernel=1G-2G:192M,2G-64G:256M,64G-:512M"
kernel="/boot/vmlinuz-5.14.0-284.11.1.el9_2.x86_64"args="ro console=ttyS0,115200n8 no_timer_check net.ifnames=0 crashkernel=1G-2G:192M,2G-64G:256M,64G-:512M"
删除内核
sudo dnf remove kernel-core-5.14.0-687.15.1.el9_8.x86_64
查看grub2启动参数
sudo grub2-editenv list
生效
sudo grub2-mkconfig -o /boot/grub2/grub.cfg
