1 sudo cp /etc/apt/sources.list /etc/apt/sources.list_backup

注：  lsb_release -a 查看ubuntu版本号

1 sudo gedit /etc/apt/sources.list

deb http://archive.ubuntu.com/ubuntu/ trusty main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu/ trusty-security main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu/ trusty-updates main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu/ trusty-proposed main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverse

deb-src http://archive.ubuntu.com/ubuntu/ trusty main restricted universe multiverse

deb-src http://archive.ubuntu.com/ubuntu/ trusty-security main restricted universe multiverse

deb-src http://archive.ubuntu.com/ubuntu/ trusty-updates main restricted universe multiverse

deb-src http://archive.ubuntu.com/ubuntu/ trusty-proposed main restricted universe multiverse

deb-src http://archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverse

sudo apt-get update

sudo apt-get install g++

Ctrl + Alt + T

先创建一个文件夹（例如：CPP）
mkdir CPP
在文件CPP下，创建一个main.cpp文件
cd CPP
touch main.cpp
创建完成后，打开main.cpp
gedit main.cpp

1 #include<iostream>
2 using namespace std;
3 int main()
4 {
5    cout<<"hello This is My first CPlusPlus!"<<endl;
6    return 0;
7 }

1  g++ main.cpp  -o test
2  ./test