在一个 ubuntu 容器内,换源，安装和运行（ ifconfig, ps,ping）

要修改容器内的ubuntu 的源, (假设该容器名称为 ubuntu01 )步骤如下:

1. 进入容器
   docker exec -it ubuntu01 /bin/bash
2. 修改源, 运行如下命令
   cat > /etc/apt/sources.list <<-EOF
   deb http://mirrors.aliyun.com/ubuntu/ trusty main restricted universe multiverse
   deb http://mirrors.aliyun.com/ubuntu/ trusty-security main restricted universe multiverse
   deb http://mirrors.aliyun.com/ubuntu/ trusty-updates main restricted universe multiverse
   deb http://mirrors.aliyun.com/ubuntu/ trusty-proposed main restricted universe multiverse
   deb http://mirrors.aliyun.com/ubuntu/ trusty-backports main restricted universe multiverse
   EOF
3. 安装软件 (ifconfig, ps, ping这些命令)
   apt-get clean
   apt-get autoremove --purge
   apt update
   apt -y install net-tools procps iputils-ping

   net-tools :为了使用ifconfig

   procps：为了使用ps

   iputils-ping：为了使用ping