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修改教程: 1.编辑/etc/apt/sources.list vi /etc/apt/sources.list按下字母i键,进入编辑模式。删除全部内容,将下列准备的更新源内容粘贴进去,即可保存退出。 保存退出的命令是按Esc然后输入:!wq(冒号也要输入) 腾讯源: deb http://mirrors.tencentyun.com/ubuntu/ bionic main restricted universe multiversedeb http://mirrors.tencentyun.com/ubuntu/ bionic-security main restricted universe multiversedeb http://mirrors.tencentyun.com/ubuntu/ bionic-updates main restricted universe multiverse#deb http://mirrors.tencentyun.com/ubuntu/ bionic-proposed main restricted universe multiverse#deb http://mirrors.tencentyun.com/ubuntu/ bionic-backports main restricted universe multiversedeb-src http://mirrors.tencentyun.com/ubuntu/ bionic main restricted universe multiversedeb-src http://mirrors.tencentyun.com/ubuntu/ bionic-security main restricted universe multiversedeb-src http://mirrors.tencentyun.com/ubuntu/ bionic-updates main restricted universe multiverse#deb-src http://mirrors.tencentyun.com/ubuntu/ bionic-proposed main restricted universe multiverse#deb-src http://mirrors.tencentyun.com/ubuntu/ bionic-backports main restricted universe multiverse如图:
执行软件源更新: sudo apt updatesudo apt upgrade
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