Ubuntu 系统大版本升级指南：sudo do-release-upgrade 实践记录

~ sudo nano /etc/update-manager/release-upgrades

# Default behavior for the release upgrader.

[DEFAULT]
# Default prompting and upgrade behavior, valid options:
#
#  never  - Never check for, or allow upgrading to, a new release.
#  normal - Check to see if a new release is available.  If more than one new
#           release is found, the release upgrader will attempt to upgrade to
#           the supported release that immediately succeeds the
#           currently-running release.
#  lts    - Check to see if a new LTS release is available.  The upgrader
#           will attempt to upgrade to the first LTS release available after
#           the currently-running one.  Note that if this option is used and
#           the currently-running release is not itself an LTS release the
#           upgrader will assume prompt was meant to be normal.

# 这里，升级到 LTS 版本，这里可以不用动，非 LTS 则需要改为 normal
Prompt=normal

~  sudo do-release-upgrade
正在检查新版 Ubuntu
请在升级前安装您的发行版所有可用更新。
~  

sudo apt-mark unhold "*"           # 解除所有被锁定的软件包
sudo apt update && sudo apt upgrade -y

错误 https://mirrors.cloud.tencent.com/ubuntu plucky-updates/restricted amd64 Components                                           
  Hash 校验和不符
Hashes of expected file:
 - Filesize:212 [weak]
 - SHA256:87df20faa3c957ab6928e62f6d46e6b55cab298e31055d610406b8257b0b50be
 - SHA1:d807a646aa6aa0d90ab71b77a1f1bf297d547718 [weak]
 - MD5Sum:fe603e783a8ab4c6af9692c62e8d038d [weak]
Hashes of received file:
 - SHA256:8d01c055a4f11f61e143a38cc33038e3206563ee60884034879058c1c1d9574c
 - SHA1:f7f48a759a3fcc629445830409454b467ff1c9fe [weak]
 - MD5Sum:4addb445ffc5944f5c0b0d345c021bcc [weak]
 - Filesize:212 [weak]
Last modification reported: Mon, 17 Nov 2025 15:22:29 +0000
Release file created at: Tue, 18 Nov 2025 02:47:08 +0000

99% [执行中]                                                                                                                      99% [执行中]                                                                                                                      已下载 126 kB，耗时 0秒 (0 B/s)                                                                                                         

升级时出错 

升级过程中出错。这通常是一些网络问题，请检查您的网络连接后再试 

E:无法下载 
https://mirrors.cloud.tencent.com/ubuntu/dists/plucky-updates/restricted/dep11/Components-amd64.yml.xz 
Hash 校验和不符 
Hashes of expected file: 
- Filesize:212 [weak] 
- 
SHA256:87df20faa3c957ab6928e62f6d46e6b55cab298e31055d610406b8257b0b50be 
- SHA1:d807a646aa6aa0d90ab71b77a1f1bf297d547718 [weak] 
- MD5Sum:fe603e783a8ab4c6af9692c62e8d038d [weak] 
Hashes of received file: 
- 
SHA256:8d01c055a4f11f61e143a38cc33038e3206563ee60884034879058c1c1d9574c 
- SHA1:f7f48a759a3fcc629445830409454b467ff1c9fe [weak] 
- MD5Sum:4addb445ffc5944f5c0b0d345c021bcc [weak] 
- Filesize:212 [weak] 
Last modification reported: Mon, 17 Nov 2025 15:22:29 +0000 
Release file created at: Tue, 18 Nov 2025 02:47:08 +0000 
, E:部分索引文件下载失败。如果忽略它们，那将转而使用旧的索引文件。 


正在恢复原始系统状态

中止
正在读取软件包列表... 完成     
正在分析软件包的依赖关系树... 完成 
正在读取状态信息... 完成  

# /etc/apt/sources.list 示例
Types: deb
URIs: http://archive.ubuntu.com/ubuntu
Suites: plucky plucky-updates plucky-security plucky-backports
Components: main restricted universe multiverse
Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg

# Types: deb
# URIs: http://security.ubuntu.com/ubuntu/
# Suites: noble-security
# Components: main restricted universe multiverse
# Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg

sudo apt update && sudo apt upgrade -y

sudo do-release-upgrade