环境

鲁班猫2N Ubuntu系统

问题

报错如下

Err:32 https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy-backports/main arm64 Packages
  404  Not Found [IP: 101.6.15.130 443]
Ign:33 https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy-backports/universe arm64 Packages
Fetched 380 kB in 18s (20.8 kB/s)
Reading package lists... Done
E: Failed to fetch https://mirrors.tuna.tsinghua.edu.cn/ubuntu/dists/jammy/main/binary-arm64/Packages  404  Not Found [IP: 101.6.15.130 443]
E: Failed to fetch https://mirrors.tuna.tsinghua.edu.cn/ubuntu/dists/jammy-updates/main/binary-arm64/Packages  404  Not Found [IP: 101.6.15.130 443]
E: Failed to fetch https://mirrors.tuna.tsinghua.edu.cn/ubuntu/dists/jammy-backports/main/binary-arm64/Packages  404  Not Found [IP: 101.6.15.130 443]
E: Failed to fetch http://security.ubuntu.com/ubuntu/dists/jammy-security/main/binary-arm64/Packages  404  Not Found [IP: 185.125.190.39 80]
E: Some index files failed to download. They have been ignored, or old ones used instead.

原因

这是选错了软件源，清华的镜像有专门针对ARM架构的源
如果你是Ubuntu22版本，将下列内容写入到/etc/apt/sources.list
然后执行

apt update

即可正常安装软件

# 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 https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ jammy main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ jammy main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ jammy-updates main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ jammy-updates main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ jammy-backports main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ jammy-backports main restricted universe multiverse

# deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ jammy-security main restricted universe multiverse
# # deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ jammy-security main restricted universe multiverse

deb http://ports.ubuntu.com/ubuntu-ports/ jammy-security main restricted universe multiverse
# deb-src http://ports.ubuntu.com/ubuntu-ports/ jammy-security main restricted universe multiverse

# 预发布软件源，不建议启用
# deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ jammy-proposed main restricted universe multiverse
# # deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ jammy-proposed main restricted universe multiverse

如果你使用的其他版本的Ubuntu
自己在https://mirrors.tuna.tsinghua.edu.cn/help/ubuntu-ports/自己生成即可

结语

大家有其他问题可以留言