有时候Ubuntu官方的镜像源速度不佳，所以我们需要手动对镜像源进行修改。我这边写了两个简单的Bash小脚本，一键将Ubuntu的官方镜像源自动替换为阿里源。两个脚本分别适配于Ubuntu24.04之后的以及Ubuntu 23.10之前的。（Ubuntu在24.04版本之后，配置文件的格式和位置发生了变化，所以需要两个不一样的脚本）

注意：使用本脚本前请充分评估系统稳定性以及做好备份（打好快照）

适用于24.04之后的

sudo bash -c '
CODENAME=$(lsb_release -sc)
cat > /etc/apt/sources.list.d/ubuntu.sources << EOF
Types: deb deb-src
URIs: https://mirrors.aliyun.com/ubuntu/
Suites: ${CODENAME} ${CODENAME}-updates ${CODENAME}-backports ${CODENAME}-security
Components: main restricted universe multiverse
Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg
EOF
' && sudo apt update

适用于23.10之前的

sudo bash -c '
CODENAME=$(lsb_release -sc)
cat > /etc/apt/sources.list << EOF
deb https://mirrors.aliyun.com/ubuntu/ ${CODENAME} main restricted universe multiverse
deb-src https://mirrors.aliyun.com/ubuntu/ ${CODENAME} main restricted universe multiverse
deb https://mirrors.aliyun.com/ubuntu/ ${CODENAME}-updates main restricted universe multiverse
deb-src https://mirrors.aliyun.com/ubuntu/ ${CODENAME}-updates main restricted universe multiverse
deb https://mirrors.aliyun.com/ubuntu/ ${CODENAME}-backports main restricted universe multiverse
deb-src https://mirrors.aliyun.com/ubuntu/ ${CODENAME}-backports main restricted universe multiverse
deb https://mirrors.aliyun.com/ubuntu/ ${CODENAME}-security main restricted universe multiverse
deb-src https://mirrors.aliyun.com/ubuntu/ ${CODENAME}-security main restricted universe multiverse
EOF
' && sudo apt update

运行完成后的截图如上图