升级时出现奇怪的更新错误，其他所有更新设置正常，只有这两个：
grub-efi-amd64-signed/bionic-updates 1.93.2+2.02-2ubuntu8.1 amd64 [upgradable from: 1.93.1+2.02-2ubuntu8.1] unattended-upgrades/bionic-updates,bionic-updates 1.1ubuntu1.18.04.1 all [upgradable from: 1.1ubuntu1]
给我这个错误：
File descriptor 4 (/dev/sda1) leaked on vgs invocation. Parent PID 9320: grub-install
File descriptor 4 (/dev/sda1) leaked on vgs invocation. Parent PID 9320: grub-install
grub-install: error: attempt to install to encrypted disk without cryptodisk enabled. Set `GRUB_ENABLE_CRYPTODISK=y' in file `/etc/default/grub'.
dpkg: error processing package grub-efi-amd64-signed (--configure):
installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1
Processing triggers for systemd (237-3ubuntu10) ...
Setting up unattended-upgrades (1.1ubuntu1.18.04.1) ...
Replacing config file /etc/apt/apt.conf.d/20auto-upgrades with new version
Processing triggers for man-db (2.8.3-2) ...
dpkg: dependency problems prevent configuration of shim-signed:
shim-signed depends on grub-efi-amd64-signed; however:
Package grub-efi-amd64-signed is not configured yet.
dpkg: error processing package shim-signed (--configure):
dependency problems - leaving unconfigured
No apport report written because the error message indicates its a followup error from a previous failure.
Errors were encountered while processing:
grub-efi-amd64-signed
shim-signed
E: Sub-process /usr/bin/dpkg returned an error code (1)
答案1
好的，出现此错误是因为 grub 试图对未加密的文件进行更改。
要解决此问题，您必须GRUB_ENABLE_CRYPTODISK=y
在文件中添加以下行：/etc/default/grub
此后，一切都将按应有的方式更新。
不知道为什么从一开始就出现这个错误。
[已编辑]
如果您像我一样修复此错误，它将破坏您的 GRUB 加载程序，并且您将不得不恢复它。