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<section id="change-kernel-boot">
<span id="id1"></span><h1>Change Kernel Boot<a class="headerlink" href="#change-kernel-boot" title="Link to this heading"></a></h1>
<p>This tutorial explains the process of change kernel boot entry Clear Linux* OS.</p>
<nav class="contents local" id="contents">
<ul class="simple">
<li><p><a class="reference internal" href="#description" id="id2">Description</a></p></li>
<li><p><a class="reference internal" href="#get-the-current-boot-status" id="id3">Get the current boot status</a></p></li>
<li><p><a class="reference internal" href="#get-the-kernel-list-installed" id="id4">Get the kernel list installed</a></p></li>
<li><p><a class="reference internal" href="#set-default-kernel-to-boot" id="id5">Set default kernel to boot</a></p></li>
</ul>
</nav>
<section id="description">
<h2><a class="toc-backref" href="#id2" role="doc-backlink">Description</a><a class="headerlink" href="#description" title="Link to this heading"></a></h2>
<p>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.</p>
</section>
<section id="get-the-current-boot-status">
<h2><a class="toc-backref" href="#id3" role="doc-backlink">Get the current boot status</a><a class="headerlink" href="#get-the-current-boot-status" title="Link to this heading"></a></h2>
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>bootctl<span class="w"> </span>status
</pre></div>
</div>
<p>This is an example output:</p>
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>System:
<span class="w"> </span>Firmware:<span class="w"> </span>UEFI<span class="w"> </span><span class="m">2</span>.70<span class="w"> </span><span class="o">(</span>HP<span class="w"> </span><span class="m">265</span>.256<span class="o">)</span>
<span class="w"> </span>Firmware<span class="w"> </span>Arch:<span class="w"> </span>x64
<span class="w"> </span>Secure<span class="w"> </span>Boot:<span class="w"> </span>disabled
<span class="w"> </span>TPM2<span class="w"> </span>Support:<span class="w"> </span>yes
<span class="w"> </span>Measured<span class="w"> </span>UKI:<span class="w"> </span>no
<span class="w"> </span>Boot<span class="w"> </span>into<span class="w"> </span>FW:<span class="w"> </span>supported
Current<span class="w"> </span>Boot<span class="w"> </span>Loader:
<span class="w"> </span>Product:<span class="w"> </span>systemd-boot<span class="w"> </span><span class="m">255</span>
<span class="w"> </span>Features:<span class="w"> </span>✓<span class="w"> </span>Boot<span class="w"> </span>counting
<span class="w"> </span>✓<span class="w"> </span>Menu<span class="w"> </span>timeout<span class="w"> </span>control
<span class="w"> </span>✓<span class="w"> </span>One-shot<span class="w"> </span>menu<span class="w"> </span>timeout<span class="w"> </span>control
<span class="w"> </span>✓<span class="w"> </span>Default<span class="w"> </span>entry<span class="w"> </span>control
<span class="w"> </span>✓<span class="w"> </span>One-shot<span class="w"> </span>entry<span class="w"> </span>control
<span class="w"> </span>✓<span class="w"> </span>Support<span class="w"> </span><span class="k">for</span><span class="w"> </span>XBOOTLDR<span class="w"> </span>partition
<span class="w"> </span>✓<span class="w"> </span>Support<span class="w"> </span><span class="k">for</span><span class="w"> </span>passing<span class="w"> </span>random<span class="w"> </span>seed<span class="w"> </span>to<span class="w"> </span>OS
<span class="w"> </span>✓<span class="w"> </span>Load<span class="w"> </span>drop-in<span class="w"> </span>drivers
<span class="w"> </span>✓<span class="w"> </span>Support<span class="w"> </span>Type<span class="w"> </span><span class="c1">#1 sort-key field</span>
<span class="w"> </span>✓<span class="w"> </span>Support<span class="w"> </span>@saved<span class="w"> </span>pseudo-entry
<span class="w"> </span>✓<span class="w"> </span>Support<span class="w"> </span>Type<span class="w"> </span><span class="c1">#1 devicetree field</span>
<span class="w"> </span>✓<span class="w"> </span>Enroll<span class="w"> </span>SecureBoot<span class="w"> </span>keys
<span class="w"> </span>✓<span class="w"> </span>Retain<span class="w"> </span>SHIM<span class="w"> </span>protocols
<span class="w"> </span>✓<span class="w"> </span>Menu<span class="w"> </span>can<span class="w"> </span>be<span class="w"> </span>disabled
<span class="w"> </span>✓<span class="w"> </span>Boot<span class="w"> </span>loader<span class="w"> </span>sets<span class="w"> </span>ESP<span class="w"> </span>information
<span class="w"> </span>ESP:<span class="w"> </span>/dev/disk/by-partuuid/ea2e4278-5c0c-4498-bc99-dfc48a71ceb5
<span class="w"> </span>File:<span class="w"> </span>└─/EFI/org.clearlinux/loaderx64.efi
Random<span class="w"> </span>Seed:
<span class="w"> </span>System<span class="w"> </span>Token:<span class="w"> </span><span class="nb">set</span>
<span class="w"> </span>Exists:<span class="w"> </span>yes
Available<span class="w"> </span>Boot<span class="w"> </span>Loaders<span class="w"> </span>on<span class="w"> </span>ESP:
<span class="w"> </span>ESP:<span class="w"> </span>/boot<span class="w"> </span><span class="o">(</span>/dev/disk/by-partuuid/ea2e4278-5c0c-4498-bc99-dfc48a71ceb5<span class="o">)</span>
<span class="w"> </span>File:<span class="w"> </span>├─/EFI/systemd/systemd-bootx64.efi<span class="w"> </span><span class="o">(</span>systemd-boot<span class="w"> </span><span class="m">255</span><span class="o">)</span>
<span class="w"> </span>└─/EFI/BOOT/BOOTX64.EFI<span class="w"> </span><span class="o">(</span>systemd-boot<span class="w"> </span><span class="m">255</span><span class="o">)</span>
Boot<span class="w"> </span>Loaders<span class="w"> </span>Listed<span class="w"> </span><span class="k">in</span><span class="w"> </span>EFI<span class="w"> </span>Variables:
<span class="w"> </span>Title:<span class="w"> </span>Linux<span class="w"> </span>bootloader
<span class="w"> </span>ID:<span class="w"> </span>0x0007
<span class="w"> </span>Status:<span class="w"> </span>active,<span class="w"> </span>boot-order
<span class="w"> </span>Partition:<span class="w"> </span>/dev/disk/by-partuuid/ea2e4278-5c0c-4498-bc99-dfc48a71ceb5
<span class="w"> </span>File:<span class="w"> </span>└─/EFI/org.clearlinux/bootloaderx64.efi
<span class="w"> </span>Title:<span class="w"> </span>Linux<span class="w"> </span>Boot<span class="w"> </span>Manager
<span class="w"> </span>ID:<span class="w"> </span>0x0001
<span class="w"> </span>Status:<span class="w"> </span>active,<span class="w"> </span>boot-order
<span class="w"> </span>Partition:<span class="w"> </span>/dev/disk/by-partuuid/ea2e4278-5c0c-4498-bc99-dfc48a71ceb5
<span class="w"> </span>File:<span class="w"> </span>└─/EFI/systemd/systemd-bootx64.efi
<span class="w"> </span>Title:<span class="w"> </span>Windows<span class="w"> </span>Boot<span class="w"> </span>Manager
<span class="w"> </span>ID:<span class="w"> </span>0x0000
<span class="w"> </span>Status:<span class="w"> </span>active,<span class="w"> </span>boot-order
<span class="w"> </span>Partition:<span class="w"> </span>/dev/disk/by-partuuid/48d8a9eb-d84d-4a62-8302-edff383290e5
<span class="w"> </span>File:<span class="w"> </span>└─/EFI/Microsoft/Boot/bootmgfw.efi
Boot<span class="w"> </span>Loader<span class="w"> </span>Entries:
<span class="w"> </span><span class="nv">$BOOT</span>:<span class="w"> </span>/boot<span class="w"> </span><span class="o">(</span>/dev/disk/by-partuuid/ea2e4278-5c0c-4498-bc99-dfc48a71ceb5<span class="o">)</span>
<span class="w"> </span>token:<span class="w"> </span>clear-linux-os
Default<span class="w"> </span>Boot<span class="w"> </span>Loader<span class="w"> </span>Entry:
<span class="w"> </span>type:<span class="w"> </span>Boot<span class="w"> </span>Loader<span class="w"> </span>Specification<span class="w"> </span>Type<span class="w"> </span><span class="c1">#1 (.conf)</span>
<span class="w"> </span>title:<span class="w"> </span>Clear<span class="w"> </span>Linux<span class="w"> </span>OS<span class="w"> </span><span class="o">(</span>Clear-linux-native-6.8.10-1434.conf<span class="o">)</span>
<span class="w"> </span>id:<span class="w"> </span>Clear-linux-native-6.8.10-1434.conf
<span class="w"> </span>source:<span class="w"> </span>/boot//loader/entries/Clear-linux-native-6.8.10-1434.conf
<span class="w"> </span>linux:<span class="w"> </span>/boot//EFI/org.clearlinux/kernel-org.clearlinux.native.6.8.10-1434
<span class="w"> </span>initrd:<span class="w"> </span>/boot//EFI/org.clearlinux/freestanding-00-early-ucode.cpio
<span class="w"> </span>/boot//EFI/org.clearlinux/initrd-org.clearlinux.native.6.8.10-1434
<span class="w"> </span>/boot//EFI/org.clearlinux/freestanding-clr-init.cpio.gz
<span class="w"> </span>/boot//EFI/org.clearlinux/freestanding-i915-firmware.cpio
<span class="w"> </span>options:<span class="w"> </span><span class="nv">root</span><span class="o">=</span><span class="nv">UUID</span><span class="o">=</span>67e7ac9a-f7a1-4d5e-bbd6-012f5fa81cb5<span class="w"> </span>rd.luks.uuid<span class="o">=</span>abe6aaf2-3425-4eb1-b7f5-3f36746426fa<span class="w"> </span>quiet<span class="w"> </span><span class="nv">console</span><span class="o">=</span>tty0<span class="w"> </span><span class="nv">console</span><span class="o">=</span>ttyS0,115200n8<span class="w"> </span>cryptomgr.notests<span class="w"> </span><span class="nv">init</span><span class="o">=</span>/usr/bin/initra-desktop<span class="w"> </span>initcall&gt;
lines<span class="w"> </span><span class="m">20</span>-71/71<span class="w"> </span><span class="o">(</span>END<span class="o">)</span>
<span class="w"> </span>✓<span class="w"> </span>Support<span class="w"> </span>@saved<span class="w"> </span>pseudo-entry
<span class="w"> </span>✓<span class="w"> </span>Support<span class="w"> </span>Type<span class="w"> </span><span class="c1">#1 devicetree field</span>
<span class="w"> </span>✓<span class="w"> </span>Enroll<span class="w"> </span>SecureBoot<span class="w"> </span>keys
<span class="w"> </span>✓<span class="w"> </span>Retain<span class="w"> </span>SHIM<span class="w"> </span>protocols
<span class="w"> </span>✓<span class="w"> </span>Menu<span class="w"> </span>can<span class="w"> </span>be<span class="w"> </span>disabled
<span class="w"> </span>✓<span class="w"> </span>Boot<span class="w"> </span>loader<span class="w"> </span>sets<span class="w"> </span>ESP<span class="w"> </span>information
<span class="w"> </span>ESP:<span class="w"> </span>/dev/disk/by-partuuid/ea2e4278-5c0c-4498-bc99-dfc48a71ceb5
<span class="w"> </span>File:<span class="w"> </span>└─/EFI/org.clearlinux/loaderx64.efi
Random<span class="w"> </span>Seed:
<span class="w"> </span>System<span class="w"> </span>Token:<span class="w"> </span><span class="nb">set</span>
<span class="w"> </span>Exists:<span class="w"> </span>yes
Available<span class="w"> </span>Boot<span class="w"> </span>Loaders<span class="w"> </span>on<span class="w"> </span>ESP:
<span class="w"> </span>ESP:<span class="w"> </span>/boot<span class="w"> </span><span class="o">(</span>/dev/disk/by-partuuid/ea2e4278-5c0c-4498-bc99-dfc48a71ceb5<span class="o">)</span>
<span class="w"> </span>File:<span class="w"> </span>├─/EFI/systemd/systemd-bootx64.efi<span class="w"> </span><span class="o">(</span>systemd-boot<span class="w"> </span><span class="m">255</span><span class="o">)</span>
<span class="w"> </span>└─/EFI/BOOT/BOOTX64.EFI<span class="w"> </span><span class="o">(</span>systemd-boot<span class="w"> </span><span class="m">255</span><span class="o">)</span>
Boot<span class="w"> </span>Loaders<span class="w"> </span>Listed<span class="w"> </span><span class="k">in</span><span class="w"> </span>EFI<span class="w"> </span>Variables:
<span class="w"> </span>Title:<span class="w"> </span>Linux<span class="w"> </span>bootloader
<span class="w"> </span>ID:<span class="w"> </span>0x0007
<span class="w"> </span>Status:<span class="w"> </span>active,<span class="w"> </span>boot-order
<span class="w"> </span>Partition:<span class="w"> </span>/dev/disk/by-partuuid/ea2e4278-5c0c-4498-bc99-dfc48a71ceb5
<span class="w"> </span>File:<span class="w"> </span>└─/EFI/org.clearlinux/bootloaderx64.efi
<span class="w"> </span>Title:<span class="w"> </span>Linux<span class="w"> </span>Boot<span class="w"> </span>Manager
<span class="w"> </span>ID:<span class="w"> </span>0x0001
<span class="w"> </span>Status:<span class="w"> </span>active,<span class="w"> </span>boot-order
<span class="w"> </span>Partition:<span class="w"> </span>/dev/disk/by-partuuid/ea2e4278-5c0c-4498-bc99-dfc48a71ceb5
<span class="w"> </span>File:<span class="w"> </span>└─/EFI/systemd/systemd-bootx64.efi
<span class="w"> </span>Title:<span class="w"> </span>Windows<span class="w"> </span>Boot<span class="w"> </span>Manager
<span class="w"> </span>ID:<span class="w"> </span>0x0000
<span class="w"> </span>Status:<span class="w"> </span>active,<span class="w"> </span>boot-order
<span class="w"> </span>Partition:<span class="w"> </span>/dev/disk/by-partuuid/48d8a9eb-d84d-4a62-8302-edff383290e5
<span class="w"> </span>File:<span class="w"> </span>└─/EFI/Microsoft/Boot/bootmgfw.efi
Boot<span class="w"> </span>Loader<span class="w"> </span>Entries:
<span class="w"> </span><span class="nv">$BOOT</span>:<span class="w"> </span>/boot<span class="w"> </span><span class="o">(</span>/dev/disk/by-partuuid/ea2e4278-5c0c-4498-bc99-dfc48a71ceb5<span class="o">)</span>
<span class="w"> </span>token:<span class="w"> </span>clear-linux-os
Default<span class="w"> </span>Boot<span class="w"> </span>Loader<span class="w"> </span>Entry:
<span class="w"> </span>type:<span class="w"> </span>Boot<span class="w"> </span>Loader<span class="w"> </span>Specification<span class="w"> </span>Type<span class="w"> </span><span class="c1">#1 (.conf)</span>
<span class="w"> </span>title:<span class="w"> </span>Clear<span class="w"> </span>Linux<span class="w"> </span>OS<span class="w"> </span><span class="o">(</span>Clear-linux-native-6.8.10-1434.conf<span class="o">)</span>
<span class="w"> </span>id:<span class="w"> </span>Clear-linux-native-6.8.10-1434.conf
<span class="w"> </span>source:<span class="w"> </span>/boot//loader/entries/Clear-linux-native-6.8.10-1434.conf
<span class="w"> </span>linux:<span class="w"> </span>/boot//EFI/org.clearlinux/kernel-org.clearlinux.native.6.8.10-1434
<span class="w"> </span>initrd:<span class="w"> </span>/boot//EFI/org.clearlinux/freestanding-00-early-ucode.cpio
<span class="w"> </span>/boot//EFI/org.clearlinux/initrd-org.clearlinux.native.6.8.10-1434
<span class="w"> </span>/boot//EFI/org.clearlinux/freestanding-clr-init.cpio.gz
<span class="w"> </span>/boot//EFI/org.clearlinux/freestanding-i915-firmware.cpio
<span class="w"> </span>options:<span class="w"> </span><span class="nv">root</span><span class="o">=</span><span class="nv">UUID</span><span class="o">=</span>67e7ac9a-f7a1-4d5e-bbd6-012f5fa81cb5<span class="w"> </span>rd.luks.uuid<span class="o">=</span>abe6aaf2-3425-4eb1-b7f5-3f36746426fa<span class="w"> </span>quiet<span class="w"> </span><span class="nv">console</span><span class="o">=</span>tty0<span class="w"> </span><span class="nv">console</span><span class="o">=</span>ttyS0,115200n8<span class="w"> </span>cryptomgr.notests<span class="w"> </span><span class="nv">init</span><span class="o">=</span>/usr/bin/initra-desktop<span class="w"> </span>initcall_debug<span class="w"> </span><span class="nv">intel_iommu</span><span class="o">=</span>igfx_off<span class="w"> </span>kvm-intel.nested<span class="o">=</span><span class="m">1</span><span class="w"> </span>no_timer_check<span class="w"> </span>noreplace-smp<span class="w"> </span>page_alloc.shuffle<span class="o">=</span><span class="m">1</span><span class="w"> </span>rcupdate.rcu_expedited<span class="o">=</span><span class="m">1</span><span class="w"> </span><span class="nv">rootfstype</span><span class="o">=</span>ext4,btrfs,xfs,f2fs<span class="w"> </span><span class="nv">tsc</span><span class="o">=</span>reliable<span class="w"> </span>rw<span class="w"> </span>module.sig_unenforce<span class="w"> </span><span class="nv">rootflags</span><span class="o">=</span>x-systemd.device-timeout<span class="o">=</span><span class="m">0</span>
</pre></div>
</div>
</section>
<section id="get-the-kernel-list-installed">
<h2><a class="toc-backref" href="#id4" role="doc-backlink">Get the kernel list installed</a><a class="headerlink" href="#get-the-kernel-list-installed" title="Link to this heading"></a></h2>
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>bootctl<span class="w"> </span>list
</pre></div>
</div>
<p>And example output:</p>
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>type:<span class="w"> </span>Boot<span class="w"> </span>Loader<span class="w"> </span>Specification<span class="w"> </span>Type<span class="w"> </span><span class="c1">#1 (.conf)</span>
title:<span class="w"> </span>Clear<span class="w"> </span>Linux<span class="w"> </span>OS<span class="w"> </span><span class="o">(</span>Clear-linux-preempt_rt-6.1.38-105.conf<span class="o">)</span>
id:<span class="w"> </span>Clear-linux-preempt_rt-6.1.38-105.conf
source:<span class="w"> </span>/boot//loader/entries/Clear-linux-preempt_rt-6.1.38-105.conf
linux:<span class="w"> </span>/boot//EFI/org.clearlinux/kernel-org.clearlinux.preempt_rt.6.1.38-105
initrd:<span class="w"> </span>/boot//EFI/org.clearlinux/freestanding-00-early-ucode.cpio
<span class="w"> </span>/boot//EFI/org.clearlinux/freestanding-clr-init.cpio.gz
<span class="w"> </span>/boot//EFI/org.clearlinux/freestanding-i915-firmware.cpio
options:<span class="w"> </span><span class="nv">root</span><span class="o">=</span><span class="nv">UUID</span><span class="o">=</span>67e7ac9a-f7a1-4d5e-bbd6-012f5fa81cb5<span class="w"> </span>rd.luks.uuid<span class="o">=</span>abe6aaf2-3425-4eb1-b7f5-3f36746426fa<span class="w"> </span>quiet<span class="w"> </span><span class="nv">console</span><span class="o">=</span>tty0<span class="w"> </span><span class="nv">console</span><span class="o">=</span>ttyS0,115200n8<span class="w"> </span>cryptomgr.notests<span class="w"> </span><span class="nv">init</span><span class="o">=</span>/usr/bin/initra-desktop<span class="w"> </span>initcall_debug<span class="w"> </span><span class="nv">intel_iommu</span><span class="o">=</span>igfx_off<span class="w"> </span>kvm-intel.nested<span class="o">=</span><span class="m">1</span><span class="w"> </span>no_timer_check<span class="w"> </span>noreplace-smp<span class="w"> </span>page_alloc.shuffle<span class="o">=</span><span class="m">1</span><span class="w"> </span>rcupdate.rcu_expedited<span class="o">=</span><span class="m">1</span><span class="w"> </span><span class="nv">rootfstype</span><span class="o">=</span>ext4,btrfs,xfs<span class="w"> </span>t&gt;
type:<span class="w"> </span>Boot<span class="w"> </span>Loader<span class="w"> </span>Specification<span class="w"> </span>Type<span class="w"> </span><span class="c1">#1 (.conf)</span>
title:<span class="w"> </span>Clear<span class="w"> </span>Linux<span class="w"> </span>OS<span class="w"> </span><span class="o">(</span>Clear-linux-native-6.9.1-1436.conf<span class="o">)</span>
id:<span class="w"> </span>Clear-linux-native-6.9.1-1436.conf
source:<span class="w"> </span>/boot//loader/entries/Clear-linux-native-6.9.1-1436.conf
linux:<span class="w"> </span>/boot//EFI/org.clearlinux/kernel-org.clearlinux.native.6.9.1-1436
initrd:<span class="w"> </span>/boot//EFI/org.clearlinux/freestanding-00-early-ucode.cpio
<span class="w"> </span>/boot//EFI/org.clearlinux/initrd-org.clearlinux.native.6.9.1-1436
<span class="w"> </span>/boot//EFI/org.clearlinux/freestanding-clr-init.cpio.gz
<span class="w"> </span>/boot//EFI/org.clearlinux/freestanding-i915-firmware.cpio
options:<span class="w"> </span><span class="nv">root</span><span class="o">=</span><span class="nv">UUID</span><span class="o">=</span>67e7ac9a-f7a1-4d5e-bbd6-012f5fa81cb5<span class="w"> </span>rd.luks.uuid<span class="o">=</span>abe6aaf2-3425-4eb1-b7f5-3f36746426fa<span class="w"> </span>quiet<span class="w"> </span><span class="nv">console</span><span class="o">=</span>tty0<span class="w"> </span><span class="nv">console</span><span class="o">=</span>ttyS0,115200n8<span class="w"> </span>cryptomgr.notests<span class="w"> </span><span class="nv">init</span><span class="o">=</span>/usr/bin/initra-desktop<span class="w"> </span>initcall_debug<span class="w"> </span><span class="nv">intel_iommu</span><span class="o">=</span>igfx_off<span class="w"> </span>kvm-intel.nested<span class="o">=</span><span class="m">1</span><span class="w"> </span>no_timer_check<span class="w"> </span>noreplace-smp<span class="w"> </span>page_alloc.shuffle<span class="o">=</span><span class="m">1</span><span class="w"> </span>rcupdate.rcu_expedited<span class="o">=</span><span class="m">1</span><span class="w"> </span><span class="nv">rootfstype</span><span class="o">=</span>ext4,btrfs,xfs,f&gt;
type:<span class="w"> </span>Boot<span class="w"> </span>Loader<span class="w"> </span>Specification<span class="w"> </span>Type<span class="w"> </span><span class="c1">#1 (.conf)</span>
title:<span class="w"> </span>Clear<span class="w"> </span>Linux<span class="w"> </span>OS<span class="w"> </span><span class="o">(</span>Clear-linux-native-6.8.10-1434.conf<span class="o">)</span><span class="w"> </span><span class="o">(</span>default<span class="o">)</span><span class="w"> </span><span class="o">(</span>selected<span class="o">)</span>
id:<span class="w"> </span>Clear-linux-native-6.8.10-1434.conf
source:<span class="w"> </span>/boot//loader/entries/Clear-linux-native-6.8.10-1434.conf
linux:<span class="w"> </span>/boot//EFI/org.clearlinux/kernel-org.clearlinux.native.6.8.10-1434
initrd:<span class="w"> </span>/boot//EFI/org.clearlinux/freestanding-00-early-ucode.cpio
<span class="w"> </span>/boot//EFI/org.clearlinux/initrd-org.clearlinux.native.6.8.10-1434
<span class="w"> </span>/boot//EFI/org.clearlinux/freestanding-clr-init.cpio.gz
<span class="w"> </span>/boot//EFI/org.clearlinux/freestanding-i915-firmware.cpio
options:<span class="w"> </span><span class="nv">root</span><span class="o">=</span><span class="nv">UUID</span><span class="o">=</span>67e7ac9a-f7a1-4d5e-bbd6-012f5fa81cb5<span class="w"> </span>rd.luks.uuid<span class="o">=</span>abe6aaf2-3425-4eb1-b7f5-3f36746426fa<span class="w"> </span>quiet<span class="w"> </span><span class="nv">console</span><span class="o">=</span>tty0<span class="w"> </span><span class="nv">console</span><span class="o">=</span>ttyS0,115200n8<span class="w"> </span>cryptomgr.notests<span class="w"> </span><span class="nv">init</span><span class="o">=</span>/usr/bin/initra-desktop<span class="w"> </span>initcall_debug<span class="w"> </span><span class="nv">intel_iommu</span><span class="o">=</span>igfx_off<span class="w"> </span>kvm-intel.nested<span class="o">=</span><span class="m">1</span><span class="w"> </span>no_timer_check<span class="w"> </span>noreplace-smp<span class="w"> </span>page_alloc.shuffle<span class="o">=</span><span class="m">1</span><span class="w"> </span>rcupdate.rcu_expedited<span class="o">=</span><span class="m">1</span><span class="w"> </span><span class="nv">rootfstype</span><span class="o">=</span>ext4,btrfs,xfs,f&gt;
type:<span class="w"> </span>Automatic
title:<span class="w"> </span>Reboot<span class="w"> </span>Into<span class="w"> </span>Firmware<span class="w"> </span>Interface
id:<span class="w"> </span>auto-reboot-to-firmware-setup
source:<span class="w"> </span>/sys/firmware/efi/efivars/LoaderEntries-4a67b082-0a4c-41cf-b6c7-440b29bb8c4f
</pre></div>
</div>
</section>
<section id="set-default-kernel-to-boot">
<h2><a class="toc-backref" href="#id5" role="doc-backlink">Set default kernel to boot</a><a class="headerlink" href="#set-default-kernel-to-boot" title="Link to this heading"></a></h2>
<p>You can check the id from the latest command:</p>
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>bootctl<span class="w"> </span>list<span class="w"> </span><span class="p">|</span>grep<span class="w"> </span>id:<span class="w"> </span><span class="p">|</span>cut<span class="w"> </span>-f<span class="w"> </span><span class="m">2</span><span class="w"> </span>-d<span class="w"> </span><span class="s2">&quot;:&quot;</span>
<span class="w"> </span>id:<span class="w"> </span>Clear-linux-preempt_rt-6.1.38-105.conf
<span class="w"> </span>id:<span class="w"> </span>Clear-linux-native-6.9.1-1436.conf
<span class="w"> </span>id:<span class="w"> </span>Clear-linux-native-6.8.10-1434.conf
<span class="w"> </span>id:<span class="w"> </span>auto-reboot-to-firmware-setup
</pre></div>
</div>
<p>Set the kernel</p>
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>sudo<span class="w"> </span>bootctl<span class="w"> </span>set-default<span class="w"> </span>ID
</pre></div>
</div>
<p>For example to set 6.9.1 entry:</p>
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>sudo<span class="w"> </span>bootctl<span class="w"> </span>set-default<span class="w"> </span>Clear-linux-native-6.9.1-1436.conf
</pre></div>
</div>
<p>Just reboot</p>
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>sudo<span class="w"> </span>systemctl<span class="w"> </span>reboot
</pre></div>
</div>
<p>You will boot with the kernel set before.</p>
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<li><a class="reference internal" href="#">Change Kernel Boot</a><ul>
<li><a class="reference internal" href="#description">Description</a></li>
<li><a class="reference internal" href="#get-the-current-boot-status">Get the current boot status</a></li>
<li><a class="reference internal" href="#get-the-kernel-list-installed">Get the kernel list installed</a></li>
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