chroming/downgrade_linux_kernel_in_ubuntu22.md

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Downgrade linux kernel in Ubuntu22

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downgrade_linux_kernel_in_ubuntu22.md

Ubuntu Kernel Rollback Steps

Check current kernel version:
```
uname -r
```
List installed kernels:
```
dpkg --list | grep linux-image
```

3.a Option 1: Use GRUB menu

Reboot system
Press Shift or Esc to access GRUB menu
Select "Advanced options for Ubuntu"
Choose the desired older kernel version
Boot into the selected kernel

3.b Option 2: Modify GRUB default

Edit GRUB configuration:
```
sudo nano /etc/default/grub
```

Modify GRUB_DEFAULT line:

GRUB_DEFAULT="Advanced options for Ubuntu>Ubuntu, with Linux X.X.X-XX-generic"

Update GRUB:
```
sudo update-grub
```

Remove new kernel

Identify new and old kernel versions

Remove new kernel:

sudo apt remove linux-image-[new-version] linux-headers-[new-version]

Update GRUB:
```
sudo update-grub
```

Reboot system
Verify kernel version after reboot:
```
uname -r
```

Note: Always ensure at least one working kernel remains installed. Back up important data before making system changes.

Install linux kernel

apt install linux-image-6.8.0-40-generic linux-headers-6.8.0-40-generic linux-modules-6.8.0-40-generic linux-modules-extra-6.8.0-40-generic

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