linux 更换启动所用的内核

nasri@ubuntu:~$ cat /boot/grub/grub.cfg |grep menuentry 
if [ x"${feature_menuentry_id}" = xy ]; then
  menuentry_id_option="--id"
  menuentry_id_option=""
export menuentry_id_option
menuentry 'Ubuntu' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-83fa2095-305d-4179-ae39-152cf04076da' {
submenu 'Advanced options for Ubuntu' $menuentry_id_option 'gnulinux-advanced-83fa2095-305d-4179-ae39-152cf04076da' {
	menuentry 'Ubuntu, with Linux 5.1.7nasri-5.1.7-love-dandan' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-5.1.7nasri-5.1.7-love-dandan-advanced-83fa2095-305d-4179-ae39-152cf04076da' {
	menuentry 'Ubuntu, with Linux 5.1.7nasri-5.1.7-love-dandan (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-5.1.7nasri-5.1.7-love-dandan-recovery-83fa2095-305d-4179-ae39-152cf04076da' {
	menuentry 'Ubuntu, with Linux 4.18.0-25-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.18.0-25-generic-advanced-83fa2095-305d-4179-ae39-152cf04076da' {
	menuentry 'Ubuntu, with Linux 4.18.0-25-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.18.0-25-generic-recovery-83fa2095-305d-4179-ae39-152cf04076da' {
	menuentry 'Ubuntu, with Linux 4.18.0-24-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.18.0-24-generic-advanced-83fa2095-305d-4179-ae39-152cf04076da' {
	menuentry 'Ubuntu, with Linux 4.18.0-24-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.18.0-24-generic-recovery-83fa2095-305d-4179-ae39-152cf04076da' {
menuentry 'Memory test (memtest86+)' {
menuentry 'Memory test (memtest86+, serial console 115200)' {
nasri@ubuntu:~$ grub-set-default "Ubuntu, with Linux 4.18.0-25-generic"
/usr/bin/grub-editenv: error: cannot open `/boot/grub/grubenv': Permission denied.
/usr/bin/grub-editenv: error: cannot open `/boot/grub/grubenv': Permission denied.
/usr/bin/grub-editenv: error: cannot open `/boot/grub/grubenv': Permission denied.


nasri@ubuntu:~$ sudo grub-set-default "Ubuntu, with Linux 4.18.0-25-generic"
nasri@ubuntu:~$ 
nasri@ubuntu:~$ sudo grub-editenv list
saved_entry=Ubuntu, with Linux 4.18.0-25-generic
nasri@ubuntu:~$ 

首先看下目前有哪些内核:

cat /boot/grub/grub.cfg |grep menuentry

然后通过

suod grub-set-default "Ubuntu, with Linux 4.18.0-25-generic"

设置想用的内核

最后看下设置的是否正确

nasri@ubuntu:~$ sudo grub-editenv list
saved_entry=Ubuntu, with Linux 4.18.0-25-generic
 

重启看看吧

发现还是不行,后来只能把grub.cfg中不想用的那个内核相关的行给删掉了,然后重启就可以了。。。。。

哎,光看网上说的有时候还是不行,还得自己摸索下。

 


版权声明:本文为yangkunhenry原创文章,遵循CC 4.0 BY-SA版权协议,转载请附上原文出处链接和本声明。