Ubuntu更换国内镜像源
<p> </p><h1>Ubuntu更换国内镜像源</h1>
<p> </p>
<h2>1.备份原系统中的镜像源</h2>
<p><strong>sudo cp /etc/apt/sources.list /etc/apt/sources.bak1</strong></p>
<p>#第一个参数时拷贝的文件路径和文件名称,第二个是拷贝到(粘贴)的文件路径和文件名</p>
<p> <span class="cnblogs_code"><span style="color: rgba(0, 0, 255, 1)">sudo</span> <span style="color: rgba(0, 0, 255, 1)">cp</span> /etc/apt/sources.list /etc/apt/sources.bak1</span> </p>
<p> </p>
<h2>2.更改镜像源文件的访问权限(增加写权限)</h2>
<p><strong>sudo chmod u+w /etc/apt/sources.list</strong></p>
<p><strong> <span class="cnblogs_code"><span style="color: rgba(0, 0, 255, 1)">sudo</span> <span style="color: rgba(0, 0, 255, 1)">chmod</span> u+<span style="color: rgba(0, 0, 255, 1)">w</span> /etc/apt/sources.list</span> </strong></p>
<p> </p>
<p>更改完成可以再恢复文件的访问权限。</p>
<p>清华镜像源：https://mirrors.tuna.tsinghua.edu.cn/help/ubuntu/ </p>
<p> </p>
<h2>3.更改镜像源内容</h2>
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<pre>#方法 <span style="color: rgba(0, 0, 255, 1)">sudo</span> gedit /etc/apt/<span style="color: rgba(0, 0, 0, 1)">sources.list
#阿里源
#deb http:</span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse</span>
#deb http:<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse</span>
#deb http:<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse</span>
#deb http:<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse</span>
#deb http:<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse</span>
#deb-src http:<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse</span>
#deb-src http:<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse</span>
#deb-src http:<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse</span>
#deb-src http:<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse</span>
#deb-src http:<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse</span>
<span style="color: rgba(0, 0, 0, 1)">
#网易源
#deb http:</span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">mirrors.163.com/ubuntu/ bionic main restricted universe multiverse</span>
#deb http:<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">mirrors.163.com/ubuntu/ bionic-security main restricted universe multiverse</span>
#deb http:<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">mirrors.163.com/ubuntu/ bionic-updates main restricted universe multiverse</span>
#deb http:<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">mirrors.163.com/ubuntu/ bionic-proposed main restricted universe multiverse</span>
#deb http:<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">mirrors.163.com/ubuntu/ bionic-backports main restricted universe multiverse</span>
#deb-src http:<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">mirrors.163.com/ubuntu/ bionic main restricted universe multiverse</span>
#deb-src http:<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">mirrors.163.com/ubuntu/ bionic-security main restricted universe multiverse</span>
#deb-src http:<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">mirrors.163.com/ubuntu/ bionic-updates main restricted universe multiverse</span>
#deb-src http:<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">mirrors.163.com/ubuntu/ bionic-proposed main restricted universe multiverse</span>
#deb-src http:<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">mirrors.163.com/ubuntu/ bionic-backports main restricted universe multiverse</span>
<span style="color: rgba(0, 0, 0, 1)">
#清华源
#deb https:</span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic main restricted universe multiverse</span>
#deb-src https:<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic main restricted universe multiverse</span>
#deb https:<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse</span>
#deb-src https:<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse</span>
#deb https:<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse</span>
#deb-src https:<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse</span>
#deb https:<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-security main restricted universe multiverse</span>
#deb-src https:<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-security main restricted universe multiverse</span>
#deb https:<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse</span>
#deb-src https:<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse</span>
<span style="color: rgba(0, 0, 0, 1)">
##中科大源
deb https:</span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">mirrors.ustc.edu.cn/ubuntu/ bionic main restricted universe multiverse</span>
deb-src https:<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">mirrors.ustc.edu.cn/ubuntu/ bionic main restricted universe multiverse</span>
deb https:<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">mirrors.ustc.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse</span>
deb-src https:<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">mirrors.ustc.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse</span>
deb https:<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">mirrors.ustc.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse</span>
deb-src https:<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">mirrors.ustc.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse</span>
deb https:<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">mirrors.ustc.edu.cn/ubuntu/ bionic-security main restricted universe multiverse</span>
deb-src https:<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">mirrors.ustc.edu.cn/ubuntu/ bionic-security main restricted universe multiverse</span>
deb https:<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">mirrors.ustc.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse</span>
deb-src https:<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">mirrors.ustc.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse</span></pre>
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<span class="cnblogs_code_collapse">sources.list</span></div>
<p> </p>
<h2>4.更新软件源列表</h2>
<p><strong>sudo apt-get update</strong><br>#这个命令，会访问源列表里的每个网址，并读取软件列表，然后保存在本地电脑。<br>我们在新立得软件包管理器里看到的软件列表，都是通过update命令更新的。</p>
<p> <span class="cnblogs_code"><span style="color: rgba(0, 0, 255, 1)">sudo</span> apt-get update</span> </p>
<p> </p>
<p><strong>sudo apt-get upgrade</strong><br>#这个命令，会把本地已安装的软件，与刚下载的软件列表里对应软件进行对比，如果发现已安装的软件版本太低，<br>就会提示你更新。如果你的软件都是最新版本，会提示：<br> 升级了 0 个软件包，新安装了 0 个软件包，要卸载 0 个软件包，有 0 个软件包未被升级。</p>
<p> <span class="cnblogs_code"><span style="color: rgba(0, 0, 255, 1)">sudo</span> apt-get upgrade</span> </p>
<p> </p>
<p> </p>
<p>【参考1】https://blog.csdn.net/qq_21095573/article/details/99736630</p>
<p> </p><br><br>
来源：https://www.cnblogs.com/doitjust/p/14585644.html
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