ubuntu改源
备份原始源
sudo cp /etc/apt/sources.list /etc/apt/sources.list.disabled
查看ubuntu发行版本
lsb_release -a
arm64 noble版本的源
清华源
vim修改源
esc :1,$d # 删除所有
# 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/ noble main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ noble main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ noble-updates main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ noble-updates main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ noble-backports main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ noble-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
deb http://ports.ubuntu.com/ubuntu-ports/ noble-security main restricted universe multiverse
# deb-src http://ports.ubuntu.com/ubuntu-ports/ noble-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/ noble-proposed main restricted universe multiverse
# # deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ noble-proposed main restricted universe multiverse
更新系统软件源
# sudo apt update 是一个在基于 Debian 的 Linux 发行版（如 Ubuntu）中使用的命令
# 它用于更新本地软件包索引数据库。这个命令不会实际安装或升级任何软件包
# 但它会检查配置的软件源（通常位于 /etc/apt/sources.list 文件和 /etc/apt/sources.list.d/ 目录下的文件中）
# 以获取最新的软件包列表和版本信息。
sudo apt-get update