本文将详细讲解在Linux系统下连接PPTP VPN的步骤。您需要安装pptp客户端，然后配置PPTP连接，包括设置VPN服务器地址、用户名和密码等。通过命令行启动PPTP VPN连接，即可成功访问VPN资源。
随着互联网的日益普及，VPN技术已成为众多用户在确保网络安全与隐私保护方面的首选方案，PPTP VPN因其配置简便、连接速度快等特点，备受用户青睐，本文将为您详细讲解如何在Linux系统下实现PPTP VPN的连接。
PPTP VPN简介
PPTP（Point-to-Point Tunneling Protocol，点对点隧道协议）是一种网络协议，主要用于建立点对点隧道，实现两个网络节点之间的安全连接，PPTP VPN能够实现远程访问企业内部网络、突破地域限制等功能。
准备工作
在进行PPTP VPN连接之前，您需要做好以下准备工作：
- 一台Linux服务器或虚拟机；
- 一台支持PPTP VPN服务的VPN服务器；
- VPN服务器的IP地址及端口号；
- VPN服务器的用户名和密码。
在Linux系统下连接PPTP VPN
以下以Ubuntu 18.04为例，介绍在Linux系统下连接PPTP VPN的步骤。
1. 安装PPTP VPN客户端
打开终端，输入以下命令安装PPTP VPN客户端：
sudo apt-get update
sudo apt-get install pptp-linux
2. 创建PPTP VPN配置文件
在终端中，创建一个名为pptp.pptp的配置文件，并编辑以下内容：
[Internet]
connection-type=vpn
cp-autoconnect=true
cp-critical=0
cp-id=VPN
cp-password=your_vpn_password
cp-profile=VPN
cp-push-schemes=auto
cp-server=your_vpn_server_ip
cp-ui-id=org.freedesktop.networkmanager.connection.VPN
cp-user=your_vpn_username
cp-use-same=0
cp-vpn=0
cp-vpn-method=pptp
cp-vpn-mtu=1280
cp-vpn-service-type=pptp
cp-vpn-state=0
cp-vpn-tunnel=0
cp-wait-timeout=60
cp-wait=0
cp-wait-retry=0
cp-wait-retry-max=0
cp-wait-retry-min=0
cp-wait-retry-sleep=0
cp-wait-sleep=0
cp-wait-timeout-max=0
cp-wait-timeout-min=0
cp-wait-timeout-sleep=0
cp-wait-unit=0
cp-wait-wait-for-boot=true
cp-wait-wait-for-network=true
cp-wait-wait-for-wifi=true
cp-wait-wait-timeout=0
cp-wait-wait-timeout-unit=0
cp-wait-wifi=true
cp-wait-wifi-signal=0
cp-wait-wifi-signal-max=0
cp-wait-wifi-signal-min=0
cp-wait-wifi-signal-unit=0
cp-wait-wifi-timeout=0
cp-wait-wifi-timeout-unit=0
cp-wait-wifi-wpa2=true
cp-wait-wifi-wpa=true
cp-wait-wifi-wpa3=false
cp-wait-wifi-wpa2=false
cp-wait-wifi-wpa2-enterprise=false
cp-wait-wifi-wpa-enterprise=false
cp-wait-wifi-wpa3-enterprise=false
cp-wait-wifi-wpa2-sae=false
cp-wait-wifi-wpa-sae=false
cp-wait-wifi-wpa3-sae=false
cp-wait-wifi-wpa2-sae-enterprise=false
cp-wait-wifi-wpa-sae-enterprise=false
cp-wait-wifi-wpa3-sae-enterprise=false
cp-wait-wifi-wpa-enterprise=false
cp-wait-wifi-wpa2-enterprise=false
cp-wait-wifi-wpa3-enterprise=false
cp-wait-wifi-wpa2-sae-enterprise=false
cp-wait-wifi-wpa-sae-enterprise=false
cp-wait-wifi-wpa3-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-wpa3-enterprise-wpa2-sae-enterprise=false
cp-wait-wifi-w
