标签：Ubuntu20.04 restricted build aliyun ubuntu deb main multiverse essential

背景：
在Ubuntu20.04 LTS上，需要使用gcc和g++编译器编译程序，在安装build-essential时报错。如下：

acl@ubuntu:~/test$ sudo apt install build-essential
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 build-essential : Depends: libc6-dev but it is not going to be installed or
                            libc-dev
                   Depends: g++ (>= 4:7.2) but it is not going to be installed
                   Depends: dpkg-dev (>= 1.17.11) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

初步猜测是源的问题，因此将源换成阿里的源，具体步骤如下：

1 备份原来的源

cp -ra /etc/apt/sources.list /etc/apt/sources.list.bak

2 将源换成阿里源

sudo gedit /etc/apt/sources.list

然后将里面的内容清空，把下面的内容复制进去，保存退出：
deb http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse

3 更新缓存和升级

sudo apt-get update
sudo apt-get upgrade

此时阿里源已经换好。

再次安装build-essential，就会发现能安装成功了。

测试gcc和g++是否安装成功：

gcc -v
g++ -v

标签：Ubuntu20.04,restricted,build,aliyun,ubuntu,deb,main,multiverse,essential
来源： https://blog.csdn.net/AnChenliang_1002/article/details/121875925

本站声明： 1. iCode9 技术分享网（下文简称本站）提供的所有内容，仅供技术学习、探讨和分享；
2. 关于本站的所有留言、评论、转载及引用，纯属内容发起人的个人观点，与本站观点和立场无关；
3. 关于本站的所有言论和文字，纯属内容发起人的个人观点，与本站观点和立场无关；
4. 本站文章均是网友提供，不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属；如您发现该文章侵犯了您的权益，可联系我们第一时间进行删除；
5. 本站为非盈利性的个人网站，所有内容不会用来进行牟利，也不会利用任何形式的广告来间接获益，纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。