为什么需要更改源ubuntu默认软件源服务器位于国外，下载速度被称为乌龟速度。 更糟的是，等待几个小时后可能会给你故障提示，所以为了防止抑郁，请务必在享受ubuntu之前更改酱料
要了解具体的来源是什么以及为什么需要改变来源，请访问https://www.zhi Hu.com/question/413453462
修改源的具体步骤(以资源为例，备份原始源sudo CP/etc/apt/sources.list/etc/apt/sources.list.bak
打开sources.list文件
sudo gedit /etc/apt/sources.list
删除sources.list文件的原始内容，粘贴、保存和退出资源内容
deb http://mirrors.a liyun.com/Ubuntu/bionicmainrestricteduniversemultiversedeb-src http://mirrors.a liyun.com/Ubuntu bionicmainrestricteduniversemultiversedeb http://mirrors.a liyun.com/Ubuntu/bionic-securitymainrestricteduniversemultiversedeb- src http://mirrors.a liyun.com/Ubuntu/bionic-securitymainrestricteduniversemultiversedeb 3358 mirrors.a liyun.com/Ubuntu/bionic-updatesmainrestricteduniversemultiversedeb-src http://mirrors.a liyun.com/Ubuntu/bionic-updatesmainrestricteduniversemultiversedeb 3358 mirrors.a liyun.com/Ubuntu/bionic-backportsmainrestricteduniversemultiversedeb- src http://mirrors.a liyun.com/Ubuntu/bionic-backportsmainrestricteduniversemultiversedeb 3358 mirrors.a liyun.com/Ubuntu/bionic-proposedmainrestrictedunior
更新软件列表sudo apt uadate sudo apt upgrade
其他常见源网络源deb http://mirrors.163.com/Ubuntu/trustymainrestricteduniversemultiversedeb http://mirrors.163.com/Ubuntu trusty-securitymainrestricteduniversemultiversedeb 3358 mirrors.163.com/Ubuntu/trusty-updatesmainrestricteduniversed Ubuntu/trusty-proposedmainrestricteduniversemultiversedeb http://mirrors.163.com/Ubuntu/trusty-backportsmainrestricteduniversemultiversedeb- src http://mirrors.163.com/Ubuntu/trustymainrestricteduniversemultiversedeb-src http://mirrors.163.com/Ubuntu/trusty-securitymainrestricteduniversersemulter Ubuntu/trusty-updatesmainrestricteduniversemultiversedeb-src http://mirrors.163.com/Ubuntu/trusty-proposedmainrestricteduniversemultiversedeb-src http://mirrors.163.com/Ubuntu/trusty-backportsmainrestricted
中科大源
deb http://mirrors.ustc.edu.cn/Ubuntu/xenialmainrestricteduniversemultiversedeb 3358 mirrors.ustc.edu.cn/Ubuntu xenial-securitymainrestricteduniversemultiversedeb http://mirrors.ustc.edu.cn/Ubuntu/xenial-updatesmainrestricteduniversemultiversedeb 3358 mirrors.ustc.edu.cn/Ubuntu/xenial-proposedmainrestricteduniversemultiversedeb 3358 mirrors.ustc.edu.cn/Ubuntu/xenial-backportsmainrestricteduniversemultiversedeb-src http://mirrors.ustc.edu.cn/Ubuntu/xenialmainrestricteduniversemultiversedeb-src http://mirrors.ustc.edu.cn/Ubuntu/xenial-securitymainrestricteduniversemultiversedeb-src http://mirrors.ustc.edu.cn/Ubuntu/xenial-updatesmainrestricteduniversemultiversedeb-src http://mirrors.ustc.edu.cn/Ubuntu/xenial-proposedmainrestricteduniversemultiversedeb-src http://mirrors.ustc.edu.cn/Ubuntu/xenial-backportsmainrests
清华源
EB http://mirrors.tuna.Tsinghua.edu.cn/Ubuntu/xenialmainmultiverserestricteduniversedeb 3358 mirrors.tuna.tsinghuna xenial-backportsmainmultiverserestricteduniversedeb 3358 cn/Ubuntu/xenial-proposedmainmultiverserestricteduniversedeb 3358 mirrors.tuna.Tsinghua.edu.cn/Ubuntu/xenial-securitymainmultiverserestricteduniversedeb 3358 mirrors.tuna.Tsinghua.edu.cn/Ubuntu/xenial-updatesmainmultiverserestricteduniversedeb-src http://mirrors.tuna.Tsinghua.edu.cn/Ubuntu/xenialmainmultiverserestricteduniversedeb-src http://mirrors.tuna.Tsinghua.edu.cn/Ubuntu/xenial-backportsmainmultiverserestricteduniversedeb-src http://mirrors.tuna.Tsinghua.edu.cn/Ubuntu/xenial-proposedmainmultiverserestricteduniversedeb-src http://mirrors.tuna.Tsinghua.edu.cn/Ubuntu/xenial-securitymainmultiverserestricteduniversedeb-src http://mirrors.tuna.Tsinghua.edu.cn/Ubuntu/xenial-updatede