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| .. _change_kernel_boot: | ||
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| Change Kernel Boot | ||
| ######################## | ||
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| This tutorial explains the process of change kernel boot entry |CL-ATTR|. | ||
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| .. contents:: | ||
| :local: | ||
| :depth: 1 | ||
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| Description | ||
| *********** | ||
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| For this tutorial, you will modify your kernel list to boot with the kernel you want to use. This process is valid when you cannot compile third-party kernel modules and need to come back to old, or if you compile your custom kernel. | ||
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| Get the current boot status | ||
| *************************** | ||
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| .. code-block:: bash | ||
| bootctl status | ||
| This is an example output: | ||
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| .. code-block:: bash | ||
| System: | ||
| Firmware: UEFI 2.70 (HP 265.256) | ||
| Firmware Arch: x64 | ||
| Secure Boot: disabled | ||
| TPM2 Support: yes | ||
| Measured UKI: no | ||
| Boot into FW: supported | ||
| Current Boot Loader: | ||
| Product: systemd-boot 255 | ||
| Features: ✓ Boot counting | ||
| ✓ Menu timeout control | ||
| ✓ One-shot menu timeout control | ||
| ✓ Default entry control | ||
| ✓ One-shot entry control | ||
| ✓ Support for XBOOTLDR partition | ||
| ✓ Support for passing random seed to OS | ||
| ✓ Load drop-in drivers | ||
| ✓ Support Type #1 sort-key field | ||
| ✓ Support @saved pseudo-entry | ||
| ✓ Support Type #1 devicetree field | ||
| ✓ Enroll SecureBoot keys | ||
| ✓ Retain SHIM protocols | ||
| ✓ Menu can be disabled | ||
| ✓ Boot loader sets ESP information | ||
| ESP: /dev/disk/by-partuuid/ea2e4278-5c0c-4498-bc99-dfc48a71ceb5 | ||
| File: └─/EFI/org.clearlinux/loaderx64.efi | ||
| Random Seed: | ||
| System Token: set | ||
| Exists: yes | ||
| Available Boot Loaders on ESP: | ||
| ESP: /boot (/dev/disk/by-partuuid/ea2e4278-5c0c-4498-bc99-dfc48a71ceb5) | ||
| File: ├─/EFI/systemd/systemd-bootx64.efi (systemd-boot 255) | ||
| └─/EFI/BOOT/BOOTX64.EFI (systemd-boot 255) | ||
| Boot Loaders Listed in EFI Variables: | ||
| Title: Linux bootloader | ||
| ID: 0x0007 | ||
| Status: active, boot-order | ||
| Partition: /dev/disk/by-partuuid/ea2e4278-5c0c-4498-bc99-dfc48a71ceb5 | ||
| File: └─/EFI/org.clearlinux/bootloaderx64.efi | ||
| Title: Linux Boot Manager | ||
| ID: 0x0001 | ||
| Status: active, boot-order | ||
| Partition: /dev/disk/by-partuuid/ea2e4278-5c0c-4498-bc99-dfc48a71ceb5 | ||
| File: └─/EFI/systemd/systemd-bootx64.efi | ||
| Title: Windows Boot Manager | ||
| ID: 0x0000 | ||
| Status: active, boot-order | ||
| Partition: /dev/disk/by-partuuid/48d8a9eb-d84d-4a62-8302-edff383290e5 | ||
| File: └─/EFI/Microsoft/Boot/bootmgfw.efi | ||
| Boot Loader Entries: | ||
| $BOOT: /boot (/dev/disk/by-partuuid/ea2e4278-5c0c-4498-bc99-dfc48a71ceb5) | ||
| token: clear-linux-os | ||
| Default Boot Loader Entry: | ||
| type: Boot Loader Specification Type #1 (.conf) | ||
| title: Clear Linux OS (Clear-linux-native-6.8.10-1434.conf) | ||
| id: Clear-linux-native-6.8.10-1434.conf | ||
| source: /boot//loader/entries/Clear-linux-native-6.8.10-1434.conf | ||
| linux: /boot//EFI/org.clearlinux/kernel-org.clearlinux.native.6.8.10-1434 | ||
| initrd: /boot//EFI/org.clearlinux/freestanding-00-early-ucode.cpio | ||
| /boot//EFI/org.clearlinux/initrd-org.clearlinux.native.6.8.10-1434 | ||
| /boot//EFI/org.clearlinux/freestanding-clr-init.cpio.gz | ||
| /boot//EFI/org.clearlinux/freestanding-i915-firmware.cpio | ||
| options: root=UUID=67e7ac9a-f7a1-4d5e-bbd6-012f5fa81cb5 rd.luks.uuid=abe6aaf2-3425-4eb1-b7f5-3f36746426fa quiet console=tty0 console=ttyS0,115200n8 cryptomgr.notests init=/usr/bin/initra-desktop initcall> | ||
| lines 20-71/71 (END) | ||
| ✓ Support @saved pseudo-entry | ||
| ✓ Support Type #1 devicetree field | ||
| ✓ Enroll SecureBoot keys | ||
| ✓ Retain SHIM protocols | ||
| ✓ Menu can be disabled | ||
| ✓ Boot loader sets ESP information | ||
| ESP: /dev/disk/by-partuuid/ea2e4278-5c0c-4498-bc99-dfc48a71ceb5 | ||
| File: └─/EFI/org.clearlinux/loaderx64.efi | ||
| Random Seed: | ||
| System Token: set | ||
| Exists: yes | ||
| Available Boot Loaders on ESP: | ||
| ESP: /boot (/dev/disk/by-partuuid/ea2e4278-5c0c-4498-bc99-dfc48a71ceb5) | ||
| File: ├─/EFI/systemd/systemd-bootx64.efi (systemd-boot 255) | ||
| └─/EFI/BOOT/BOOTX64.EFI (systemd-boot 255) | ||
| Boot Loaders Listed in EFI Variables: | ||
| Title: Linux bootloader | ||
| ID: 0x0007 | ||
| Status: active, boot-order | ||
| Partition: /dev/disk/by-partuuid/ea2e4278-5c0c-4498-bc99-dfc48a71ceb5 | ||
| File: └─/EFI/org.clearlinux/bootloaderx64.efi | ||
| Title: Linux Boot Manager | ||
| ID: 0x0001 | ||
| Status: active, boot-order | ||
| Partition: /dev/disk/by-partuuid/ea2e4278-5c0c-4498-bc99-dfc48a71ceb5 | ||
| File: └─/EFI/systemd/systemd-bootx64.efi | ||
| Title: Windows Boot Manager | ||
| ID: 0x0000 | ||
| Status: active, boot-order | ||
| Partition: /dev/disk/by-partuuid/48d8a9eb-d84d-4a62-8302-edff383290e5 | ||
| File: └─/EFI/Microsoft/Boot/bootmgfw.efi | ||
| Boot Loader Entries: | ||
| $BOOT: /boot (/dev/disk/by-partuuid/ea2e4278-5c0c-4498-bc99-dfc48a71ceb5) | ||
| token: clear-linux-os | ||
| Default Boot Loader Entry: | ||
| type: Boot Loader Specification Type #1 (.conf) | ||
| title: Clear Linux OS (Clear-linux-native-6.8.10-1434.conf) | ||
| id: Clear-linux-native-6.8.10-1434.conf | ||
| source: /boot//loader/entries/Clear-linux-native-6.8.10-1434.conf | ||
| linux: /boot//EFI/org.clearlinux/kernel-org.clearlinux.native.6.8.10-1434 | ||
| initrd: /boot//EFI/org.clearlinux/freestanding-00-early-ucode.cpio | ||
| /boot//EFI/org.clearlinux/initrd-org.clearlinux.native.6.8.10-1434 | ||
| /boot//EFI/org.clearlinux/freestanding-clr-init.cpio.gz | ||
| /boot//EFI/org.clearlinux/freestanding-i915-firmware.cpio | ||
| options: root=UUID=67e7ac9a-f7a1-4d5e-bbd6-012f5fa81cb5 rd.luks.uuid=abe6aaf2-3425-4eb1-b7f5-3f36746426fa quiet console=tty0 console=ttyS0,115200n8 cryptomgr.notests init=/usr/bin/initra-desktop initcall_debug intel_iommu=igfx_off kvm-intel.nested=1 no_timer_check noreplace-smp page_alloc.shuffle=1 rcupdate.rcu_expedited=1 rootfstype=ext4,btrfs,xfs,f2fs tsc=reliable rw module.sig_unenforce rootflags=x-systemd.device-timeout=0 | ||
| Get the kernel list installed | ||
| ***************************** | ||
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| .. code-block:: bash | ||
| bootctl list | ||
| And example output: | ||
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| .. code-block:: bash | ||
| type: Boot Loader Specification Type #1 (.conf) | ||
| title: Clear Linux OS (Clear-linux-preempt_rt-6.1.38-105.conf) | ||
| id: Clear-linux-preempt_rt-6.1.38-105.conf | ||
| source: /boot//loader/entries/Clear-linux-preempt_rt-6.1.38-105.conf | ||
| linux: /boot//EFI/org.clearlinux/kernel-org.clearlinux.preempt_rt.6.1.38-105 | ||
| initrd: /boot//EFI/org.clearlinux/freestanding-00-early-ucode.cpio | ||
| /boot//EFI/org.clearlinux/freestanding-clr-init.cpio.gz | ||
| /boot//EFI/org.clearlinux/freestanding-i915-firmware.cpio | ||
| options: root=UUID=67e7ac9a-f7a1-4d5e-bbd6-012f5fa81cb5 rd.luks.uuid=abe6aaf2-3425-4eb1-b7f5-3f36746426fa quiet console=tty0 console=ttyS0,115200n8 cryptomgr.notests init=/usr/bin/initra-desktop initcall_debug intel_iommu=igfx_off kvm-intel.nested=1 no_timer_check noreplace-smp page_alloc.shuffle=1 rcupdate.rcu_expedited=1 rootfstype=ext4,btrfs,xfs t> | ||
| type: Boot Loader Specification Type #1 (.conf) | ||
| title: Clear Linux OS (Clear-linux-native-6.9.1-1436.conf) | ||
| id: Clear-linux-native-6.9.1-1436.conf | ||
| source: /boot//loader/entries/Clear-linux-native-6.9.1-1436.conf | ||
| linux: /boot//EFI/org.clearlinux/kernel-org.clearlinux.native.6.9.1-1436 | ||
| initrd: /boot//EFI/org.clearlinux/freestanding-00-early-ucode.cpio | ||
| /boot//EFI/org.clearlinux/initrd-org.clearlinux.native.6.9.1-1436 | ||
| /boot//EFI/org.clearlinux/freestanding-clr-init.cpio.gz | ||
| /boot//EFI/org.clearlinux/freestanding-i915-firmware.cpio | ||
| options: root=UUID=67e7ac9a-f7a1-4d5e-bbd6-012f5fa81cb5 rd.luks.uuid=abe6aaf2-3425-4eb1-b7f5-3f36746426fa quiet console=tty0 console=ttyS0,115200n8 cryptomgr.notests init=/usr/bin/initra-desktop initcall_debug intel_iommu=igfx_off kvm-intel.nested=1 no_timer_check noreplace-smp page_alloc.shuffle=1 rcupdate.rcu_expedited=1 rootfstype=ext4,btrfs,xfs,f> | ||
| type: Boot Loader Specification Type #1 (.conf) | ||
| title: Clear Linux OS (Clear-linux-native-6.8.10-1434.conf) (default) (selected) | ||
| id: Clear-linux-native-6.8.10-1434.conf | ||
| source: /boot//loader/entries/Clear-linux-native-6.8.10-1434.conf | ||
| linux: /boot//EFI/org.clearlinux/kernel-org.clearlinux.native.6.8.10-1434 | ||
| initrd: /boot//EFI/org.clearlinux/freestanding-00-early-ucode.cpio | ||
| /boot//EFI/org.clearlinux/initrd-org.clearlinux.native.6.8.10-1434 | ||
| /boot//EFI/org.clearlinux/freestanding-clr-init.cpio.gz | ||
| /boot//EFI/org.clearlinux/freestanding-i915-firmware.cpio | ||
| options: root=UUID=67e7ac9a-f7a1-4d5e-bbd6-012f5fa81cb5 rd.luks.uuid=abe6aaf2-3425-4eb1-b7f5-3f36746426fa quiet console=tty0 console=ttyS0,115200n8 cryptomgr.notests init=/usr/bin/initra-desktop initcall_debug intel_iommu=igfx_off kvm-intel.nested=1 no_timer_check noreplace-smp page_alloc.shuffle=1 rcupdate.rcu_expedited=1 rootfstype=ext4,btrfs,xfs,f> | ||
| type: Automatic | ||
| title: Reboot Into Firmware Interface | ||
| id: auto-reboot-to-firmware-setup | ||
| source: /sys/firmware/efi/efivars/LoaderEntries-4a67b082-0a4c-41cf-b6c7-440b29bb8c4f | ||
| Set default kernel to boot | ||
| ************************** | ||
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| You can check the id from the latest command: | ||
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| .. code-block:: bash | ||
| bootctl list |grep id: |cut -f 2 -d ":" | ||
| id: Clear-linux-preempt_rt-6.1.38-105.conf | ||
| id: Clear-linux-native-6.9.1-1436.conf | ||
| id: Clear-linux-native-6.8.10-1434.conf | ||
| id: auto-reboot-to-firmware-setup | ||
| Set the kernel | ||
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| .. code-block:: bash | ||
| sudo bootctl set-default ID | ||
| For example to set 6.9.1 entry: | ||
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| .. code-block:: bash | ||
| sudo bootctl set-default Clear-linux-native-6.9.1-1436.conf | ||
| Just reboot | ||
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| .. code-block:: bash | ||
| sudo systemctl reboot | ||
| You will boot with the kernel set before. |