Update nexus: fix conflicts and sync local changes
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@@ -1,40 +1,40 @@
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---
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title: "efibootmgr"
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type: concept
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tags: [linux, uefi, boot, nvram]
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date: 2026-04-14
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aliases: [efibootmgr, efibootmgr 命令]
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---
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# efibootmgr
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## Definition
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Linux 系统下管理 UEFI NVRAM 启动项的工具,通过操作固件级启动寄存器实现启动顺序的查看、添加、删除和重排。
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## Core Mechanism
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- 读取当前 BootOrder(如 `BootOrder: 0005,0000,0001,0002,0003`)
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- 将指定启动项编号强制写入 NVRAM 替换 BootOrder
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- 持久化生效(重启后仍保持,除非固件重置)
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## Key Commands
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```bash
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# 查看当前启动项
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sudo efibootmgr
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# 强制将 0005 设为首选启动项
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sudo efibootmgr -o 0005,0000,0001,0002,0003
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# 添加新启动项(假设 /dev/nvme0n1p1 是 EFI 分区)
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sudo efibootmgr -c -d /dev/nvme0n1 -p 1 -L "Ubuntu_Force" -l "\EFI\ubuntu\shimx64.efi"
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```
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## Why It Matters
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HP ZBook 等工作站存在 BIOS 固执行为:NVRAM 启动项注册成功(`Boot0005: Ubuntu`)但未被加入 `BootOrder`,导致开机忽略该启动项。`efibootmgr -o` 是绕过此问题的核心工具。
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## Related
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- [[HP ZBook]] — 受影响的硬件平台
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- [[UEFI启动修复]] — 完整修复策略
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- [[efibootmgr]] ← [[UEFI启动修复]] ← [[HP ZBook]]
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## Sources
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- [[安装ubuntu-24-04-2在hp-zbook工作站笔记本上]]
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---
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title: "efibootmgr"
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type: concept
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tags: [linux, uefi, boot, nvram]
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date: 2026-04-14
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aliases: [efibootmgr, efibootmgr 命令]
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---
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# efibootmgr
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## Definition
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Linux 系统下管理 UEFI NVRAM 启动项的工具,通过操作固件级启动寄存器实现启动顺序的查看、添加、删除和重排。
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## Core Mechanism
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- 读取当前 BootOrder(如 `BootOrder: 0005,0000,0001,0002,0003`)
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- 将指定启动项编号强制写入 NVRAM 替换 BootOrder
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- 持久化生效(重启后仍保持,除非固件重置)
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## Key Commands
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```bash
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# 查看当前启动项
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sudo efibootmgr
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# 强制将 0005 设为首选启动项
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sudo efibootmgr -o 0005,0000,0001,0002,0003
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# 添加新启动项(假设 /dev/nvme0n1p1 是 EFI 分区)
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sudo efibootmgr -c -d /dev/nvme0n1 -p 1 -L "Ubuntu_Force" -l "\EFI\ubuntu\shimx64.efi"
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```
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## Why It Matters
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HP ZBook 等工作站存在 BIOS 固执行为:NVRAM 启动项注册成功(`Boot0005: Ubuntu`)但未被加入 `BootOrder`,导致开机忽略该启动项。`efibootmgr -o` 是绕过此问题的核心工具。
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## Related
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- [[HP ZBook]] — 受影响的硬件平台
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- [[UEFI启动修复]] — 完整修复策略
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- [[efibootmgr]] ← [[UEFI启动修复]] ← [[HP ZBook]]
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## Sources
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- [[安装ubuntu-24-04-2在hp-zbook工作站笔记本上]]
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