在此之前你可以做一个备份来及时恢复mv/etc/apt/sources.list/etc/apt/sources.list.bak;您可以使用命令sudoaptedit-sources或在/etc/apt/sources中编辑源，将以下一些源添加到.list并使用sudoaptupdate更新缓存和sudoaptupgrade升级修改后的包.如有报错，及时删除，再更新。#清华大学开源软件镜像站#默认对源镜像进行注释，提高apt更新速度。如有必要，可以取消debhttps://mirrors.tuna.tsinghua...bionicmainrestricteduniversemultiverse#deb-srchttps://mirrors.tuna.tsinghua...bionicmainrestricteduniversemultiversedebhttps://mirrors.tuna.tsinghua...bionic-updatesmainrestricteduniversemultiversedeb-srchttps://mirrors.tuna.tsinghua...bionic-updatesmainrestricteduniversemultiversedebhttps://mirrors.tuna.tsinghua...bionic-backports主受限宇宙多元宇宙#deb-srchttps://mirrors.tuna.tsinghua...bionic-backports主受限宇宙多元宇宙debhttps://mirrors.tuna.tsinghua...bionic-security主受限宇宙多元宇宙#deb-srchttps://mirrors.tuna.tsinghua...bionic-security主受限宇宙multiverse#预测发布软件源，不建议启用#debhttps://mirrors.tuna.tsinghua...bionic-proposedmainrestricteduniversemultiverse#deb-srchttps://mirrors.tuna.tsinghua...bionic-proposedmainrestricteduniversemultiverse#阿里云debhttp://mirrors.aliyun.com/ubu...trustymainrestricteduniversemultiversedebhttp://mirrors.aliyun.com/ubu...trusty-securitymainrestricteduniversemultiversedebhttp:///mirrors.aliyun.com/ubu...trusty-updatesmainrestricteduniversemultiversedebhttp://mirrors.aliyun.com/ubu...trusty-proposedmainrestricteduniversemultiversedebhttp://mirrors.aliyun.com/ubu...trusty-backportsmainrestricteduniversemultiversedeb-srchttp://mirrors.aliyun.com/ubu...trustymainrestricteduniversemultiversedeb-srchttp://mirrors.aliyun.com/ubu...trusty-securitymainrestricteduniversemultiversedeb-srchttp://mirrors.aliyun.com/ubu...trusty-updatesmainrestricteduniversemultiversedeb-srchttp://mirrors.aliyun.com/ubu...trusty-proposedmainrestricteduniversemultiversedeb-srchttp://mirrors.aliyun.com/ubu...trusty-backportsmainrestricteduniversemultiverse#中科大源debhttps://mirrors.ustc.edu.cn/u...bionicmainrestricteduniversemultiversedeb-srchttps://mirrors.ustc.edu.cn/u...bionicmainrestricteduniversemultiversedebhttps://mirrors.ustc.edu.cn/u...bionic-updatesmainrestricteduniversemultiversedeb-srchttps://mirrors.ustc.edu.cn/u...bionic-updatesmainrestricteduniversemultiversedebhttps://mirrors.ustc.edu.cn/u...bionic-backportsmainrestricteduniversemultiversedeb-srchttps://mirrors.ustc.edu.cn/u...bionic-backportsmainrestricteduniversemultiversedebhttps://mirrors.ustc.edu.cn/u...bionic-securitymainrestricteduniversemultiversedeb-srchttps://mirrors.ustc.edu.cn/u...bionic-securitymainrestricteduniversemultiversedebhttps://mirrors.ustc.edu.cn/u...bionic-proposedmainrestricteduniversemultiversedeb-srchttps://mirrors.ustc.edu.cn/你...bionic-proposedmainrestricteduniversemultiverse#网易163debhttp://mirrors.163.com/ubuntu/trustymainrestricteduniversemultiversedebhttp://mirrors.163.com/ubuntu/trusty-securitymainrestricteduniversemultiversedebhttp://mirrors.163.com/ubuntu/trusty-updatesmainrestricteduniversemultiversedebhttp://mirrors.163.com/ubuntu/trusty-proposedmainrestricteduniversemultiversedebhttp://mirrors.163.com/ubuntu/trusty-backportsmainrestricteduniversemultiversedeb-srchttp://mirrors.163.com/ubuntu/trustymainrestricteduniversemultiversedeb-srchttp://mirrors.163.com/ubuntu/trusty-securitymainrestricteduniversemultiversedeb-srchttp://mirrors.163.com/ubuntu/trusty-updatesmainrestricteduniversemultiversedeb-srchttp://mirrors.163.com/ubuntu/trusty-proposedmainrestricteduniversemultiversedeb-srchttp://mirrors.163.com/ubuntu/trusty-backportsmainrestricteduniversemultiverse#Ubuntu官方源debhttp://archive.ubuntu。com/ubu...gutsymainrestricteduniversemultiversedebhttp://archive.ubuntu.com/ubu...gutsy-securitymainrestricteduniversemultiversedebhttp://archive.ubuntu.com/ubu...gutsy-updatesmainrestricteduniversemultiversedebhttp://archive.ubuntu.com/ubu...gutsy-proposedmainrestricteduniversemultiversedebhttp://archive.ubuntu.com/ubu...gutsy-backportsmainrestricteduniversemultiversedeb-srchttp://archive.ubuntu.com/ubu...gutsymainrestricteduniversemultiversedeb-srchttp://archive.ubuntu.com/ubu...gutsy-securitymainrestricteduniversemultiversedeb-srchttp://archive.ubuntu.com/ubu...gutsy-updatesmainrestricteduniversemultiversedeb-srchttp://archive.ubuntu.com/ubu...gutsy-proposedmainrestricteduniversemultiversedeb-srchttp://archive.ubuntu.com/ubu...gutsy-backports主要的受限宇宙多元宇宙
