https://muisti.atk-neuvos.fi/tags/efibootmgr/Recent content in Efibootmgr on TerminalHugoenMon, 03 Aug 2026 00:00:00 +0000https://muisti.atk-neuvos.fi/posts/nvram/Mon, 03 Aug 2026 00:00:00 +0000https://muisti.atk-neuvos.fi/posts/nvram/<p>Efivars are stored in motherboard NVRAM and sometimes there can be too many entries making firmware updates impossible.</p> <p>Efivarfs is the linux sysfs interface for this data.</p> <h3 id="check-out-current-nvram-entries">Check out current NVRAM entries</h3> <pre tabindex="0"><code>sudo efibootmgr </code></pre><p><img src="https://muisti.atk-neuvos.fi/posts/nvram/efi.png" alt="efibootmgr output"></p> <h3 id="if-you-want-to-remove-some-useless-entry-for-example-usb-cd">If you want to remove some useless entry (for example USB CD)</h3> <pre tabindex="0"><code>sudo efibootmgr -b 1c -B </code></pre><h3 id="clean-up-duplicate-boot-order-entries">Clean up duplicate boot order entries</h3> <pre tabindex="0"><code>sudo efibootmgr -D </code></pre><p>Hopefully this will free up enough space for updates</p>