Debian/Ubuntu 降级 Linux 内核
大多数时候都是升级内核,而且网上教程比较多。今晚就讲讲怎么降级内核,因为有时新内核用着会发现bug或者不习惯,俺们就需要降级内核了。
首先查看内核启动菜单:
grep menuentry /boot/grub/grub.cfg
会输出类似下面内容:
if [ x"${feature_menuentry_id}" = xy ]; then
menuentry_id_option="--id"
menuentry_id_option=""
export menuentry_id_option
menuentry 'Debian GNU/Linux' --class debian --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-9092a863-35f2-4a22-98e9-65a45e4671bc' {
submenu 'Advanced options for Debian GNU/Linux' $menuentry_id_option 'gnulinux-advanced-9092a863-35f2-4a22-98e9-65a45e4671bc' {
menuentry 'Debian GNU/Linux, with Linux 5.10.0-0.bpo.8-cloud-amd64' --class debian --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-5.10.0-0.bpo.8-cloud-amd64-advanced-9092a863-35f2-4a22-98e9-65a45e4671bc' {
menuentry 'Debian GNU/Linux, with Linux 5.10.0-0.bpo.8-cloud-amd64 (recovery mode)' --class debian --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-5.10.0-0.bpo.8-cloud-amd64-recovery-9092a863-35f2-4a22-98e9-65a45e4671bc' {
menuentry 'Debian GNU/Linux, with Linux 4.19.0-17-cloud-amd64' --class debian --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.19.0-17-cloud-amd64-advanced-9092a863-35f2-4a22-98e9-65a45e4671bc' {
menuentry 'Debian GNU/Linux, with Linux 4.19.0-17-cloud-amd64 (recovery mode)' --class debian --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.19.0-17-cloud-amd64-recovery-9092a863-35f2-4a22-98e9-65a45e4671bc' {
上面可以看到有两个新旧内核,那么怎么从5.10内核切换到4.19内核呢?往下看
修改Grub,设置内核启动版本:
vi /etc/default/grub
修改 GRUB_DEFAULT=0 修改成如下:
GRUB_DEFAULT="Advanced options for Debian GNU/Linux>Debian GNU/Linux, with Linux 4.19.0-17-cloud-amd64"
上面保存后,执行:
update-grub
最后 /sbin/reboot
上面测试的是 Debian,俺想 Ubuntu 也适用。