Ubuntu更換軟件源sources.list
1.切換到root用戶
2.用文本編輯器打開sources.list,手動更換新源
leafpad /etc/apt/sources.list
3.更換完畢后執(zhí)行下面的更新指令俊嗽，進(jìn)行系統(tǒng)或者工具的更新
apt-get update && apt-get upgrade && apt-get dist-upgrade
PS：要點(diǎn)：需注意區(qū)分版本霜瘪，
先確定自己是什么版本：lsb_release -a
Ubuntu18.1.png
例如deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ cosmic main restricted universe multiverse龄章，中cosmic是Ubuntu18.1的疫鹊，如果是其他的曾沈，直接替換掉即可。
摘自：清華源
Ubuntu 鏡像使用幫助
Ubuntu 的軟件源配置文件是 /etc/apt/sources.list迷扇。將系統(tǒng)自帶的該文件做個備份百揭，將該文件替換為下面內(nèi)容爽哎，即可使用 TUNA 的軟件源鏡像。
選擇你的ubuntu版本:18.1
# 默認(rèn)注釋了源碼鏡像以提高 apt update 速度器一，如有需要可自行取消注釋
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ cosmic main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ cosmic main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ cosmic-updates main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ cosmic-updates main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ cosmic-backports main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ cosmic-backports main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ cosmic-security main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ cosmic-security main restricted universe multiverse
# 預(yù)發(fā)布軟件源课锌，不建議啟用
# deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ cosmic-proposed main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ cosmic-proposed main restricted universe multiverse
