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本镜像仅包含 32/64 位 x86 架构处理器的软件包，在 ARM(arm64, armhf)、PowerPC(ppc64el)、RISC-V(riscv64) 和 S390x 等架构的设备上（对应官方源为 ports.ubuntu.com）请使用 ubuntu-ports 镜像。

对于 Ubuntu 不再支持的版本，请参考 Ubuntu 旧版本帮助。

在 Ubuntu 24.04 之前，Ubuntu 的软件源配置文件使用传统的 One-Line-Style，路径为 /etc/apt/sources.list；从 Ubuntu 24.04 开始，Ubuntu 的软件源配置文件变更为 DEB822 格式，路径为 /etc/apt/sources.list.d/ubuntu.sources。

将系统自带的对应文件做个备份，然后根据格式的选择下面对应的内容替换，即可使用选择的软件源镜像。

传统格式（/etc/apt/sources.list） Ubuntu 版本Ubuntu 24.04 LTS (noble)Ubuntu 25.04 (plucky)Ubuntu 24.10 (oracular)Ubuntu 22.04 LTS (jammy)Ubuntu 20.04 LTS (focal)Ubuntu 18.04 LTS (bionic)Ubuntu 16.04 LTS (xenial) (EOL)启用源码源启用 proposed强制安全更新使用镜像# 默认注释了源码镜像以提高 apt update 速度，如有需要可自行取消注释

deb {{endpoint}}/ {{release}} main restricted universe multiverse

{{src}}deb-src {{endpoint}}/ {{release}} main restricted universe multiverse

deb {{endpoint}}/ {{release}}-updates main restricted universe multiverse

{{src}}deb-src {{endpoint}}/ {{release}}-updates main restricted universe multiverse

deb {{endpoint}}/ {{release}}-backports main restricted universe multiverse

{{src}}deb-src {{endpoint}}/ {{release}}-backports main restricted universe multiverse

# 以下安全更新软件源包含了官方源与镜像站配置，如有需要可自行修改注释切换

{{#mirror_security}}

deb {{endpoint}}/ {{release}}-security main restricted universe multiverse

{{src}}deb-src {{endpoint}}/ {{release}}-security main restricted universe multiverse

{{/mirror_security}}

{{^mirror_security}}

deb http://security.ubuntu.com/ubuntu/ {{release}}-security main restricted universe multiverse

{{src}}deb-src http://security.ubuntu.com/ubuntu/ {{release}}-security main restricted universe multiverse

{{/mirror_security}}

# 预发布软件源，不建议启用

{{proposed}}deb {{endpoint}}/ {{release}}-proposed main restricted universe multiverse

{{proposed}}{{src}}deb-src {{endpoint}}/ {{release}}-proposed main restricted universe multiverse

DEB822 格式（/etc/apt/sources.list.d/ubuntu.sources） Ubuntu 版本Ubuntu 24.04 LTS (noble)启用源码源启用 proposed强制安全更新使用镜像Types: deb

URIs: {{endpoint}}

Suites: {{release_deb822}} {{release_deb822}}-updates {{release_deb822}}-backports

Components: main restricted universe multiverse

Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg

# 默认注释了源码镜像以提高 apt update 速度，如有需要可自行取消注释

{{src}}Types: deb-src

{{src}}URIs: {{endpoint}}

{{src}}Suites: {{release_deb822}} {{release_deb822}}-updates {{release_deb822}}-backports

{{src}}Components: main restricted universe multiverse

{{src}}Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg

# 以下安全更新软件源包含了官方源与镜像站配置，如有需要可自行修改注释切换

{{#mirror_security}}

Types: deb

URIs: {{endpoint}}

Suites: {{release_deb822}}-security

Components: main restricted universe multiverse

Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg

{{src}}Types: deb-src

{{src}}URIs: {{endpoint}}

{{src}}Suites: {{release_deb822}}-security

{{src}}Components: main restricted universe multiverse

{{src}}Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg

{{/mirror_security}}

{{^mirror_security}}

Types: deb

URIs: http://security.ubuntu.com/ubuntu/

Suites: {{release_deb822}}-security

Components: main restricted universe multiverse

Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg

{{src}}Types: deb-src

{{src}}URIs: http://security.ubuntu.com/ubuntu/

{{src}}Suites: {{release_deb822}}-security

{{src}}Components: main restricted universe multiverse

{{src}}Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg

{{/mirror_security}}

# 预发布软件源，不建议启用

{{proposed}}Types: deb

{{proposed}}URIs: {{endpoint}}

{{proposed}}Suites: {{release_deb822}}-proposed

{{proposed}}Components: main restricted universe multiverse

{{proposed}}Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg

{{proposed}}{{src}}Types: deb-src

{{proposed}}{{src}}URIs: {{endpoint}}

{{proposed}}{{src}}Suites: {{release_deb822}}-proposed

{{proposed}}{{src}}Components: main restricted universe multiverse

{{proposed}}{{src}}Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg

因镜像站同步有延迟，可能会导致生产环境系统不能及时检查、安装上最新的安全更新，不建议替换 security 源。