Improve docs

- Add translation for uninstall.md
- Various corrections to docs
- [ci skip]

README-zh.md

@@ -19,6 +19,7 @@
 - [重要提示](#重要提示)
 - [关于升级Libreswan](#关于升级libreswan)
 - [问题和反馈](#问题和反馈)
+- [如何卸载](#如何卸载)
 - [另见](#另见)
 - [作者](#作者)
 - [授权协议](#授权协议)
@@ -112,9 +113,13 @@ sudo sh vpnsetup.sh
 - Libreswan (IPsec) 的相关问题可在<a href="https://lists.libreswan.org/mailman/listinfo/swan" target="_blank">邮件列表</a>提问。也可以参见这些文章：<a href="https://libreswan.org/wiki/Main_Page" target="_blank">[1]</a> <a href="https://wiki.gentoo.org/wiki/IPsec_L2TP_VPN_server" target="_blank">[2]</a> <a href="https://wiki.archlinux.org/index.php/L2TP/IPsec_VPN_client_setup" target="_blank">[3]</a> <a href="https://help.ubuntu.com/community/L2TPServer" target="_blank">[4]</a> <a href="https://libreswan.org/man/ipsec.conf.5.html" target="_blank">[5]</a>。
 - 如果你发现了一个可重复的程序漏洞，请提交一个 <a href="https://github.com/hwdsl2/setup-ipsec-vpn/issues?q=is%3Aissue" target="_blank">GitHub Issue</a>。
 
+## 如何卸载
+
+请参见 [卸载 VPN](docs/uninstall-zh.md)。
+
 ## 另见
 
-- [IPsec VPN Server on Docker](https://github.com/hwdsl2/docker-ipsec-vpn-server)
+- [在 Docker 上搭建 IPsec VPN](https://github.com/hwdsl2/docker-ipsec-vpn-server)
 
 ## 作者
 

README.md

@@ -19,6 +19,7 @@ We will use <a href="https://libreswan.org/" target="_blank">Libreswan</a> as th
 - [Important Notes](#important-notes)
 - [Upgrading Libreswan](#upgrading-libreswan)
 - [Bugs & Questions](#bugs--questions)
+- [How to Uninstall](#how-to-uninstall)
 - [See Also](#see-also)
 - [Author](#author)
 - [License](#license)
@@ -112,10 +113,13 @@ The additional scripts <a href="extras/vpnupgrade_Libreswan.sh" target="_blank">
 - Ask Libreswan (IPsec) related questions <a href="https://lists.libreswan.org/mailman/listinfo/swan" target="_blank">on the mailing list</a>, or read these articles: <a href="https://libreswan.org/wiki/Main_Page" target="_blank">[1]</a> <a href="https://wiki.gentoo.org/wiki/IPsec_L2TP_VPN_server" target="_blank">[2]</a> <a href="https://wiki.archlinux.org/index.php/L2TP/IPsec_VPN_client_setup" target="_blank">[3]</a> <a href="https://help.ubuntu.com/community/L2TPServer" target="_blank">[4]</a> <a href="https://libreswan.org/man/ipsec.conf.5.html" target="_blank">[5]</a>.
 - If you found a reproducible bug, open a <a href="https://github.com/hwdsl2/setup-ipsec-vpn/issues?q=is%3Aissue" target="_blank">GitHub Issue</a> to submit a bug report.
 
+## How to Uninstall
+
+Please refer to [Uninstall the VPN](docs/uninstall.md).
+
 ## See Also
 
 - [IPsec VPN Server on Docker](https://github.com/hwdsl2/docker-ipsec-vpn-server)
-- [For uninstallation see this](/docs/uninstall.md)
 
 ## Author
 

docs/clients-xauth-zh.md

@@ -1,6 +1,6 @@
 ## 配置 IPsec/XAuth VPN 客户端
 
-*Read this in other languages: [English](clients-xauth.md), [简体中文](clients-xauth-zh.md).*
+*其他语言版本: [English](clients-xauth.md), [简体中文](clients-xauth-zh.md).*
 
 *如需使用 IPsec/L2TP 模式连接，请参见： [配置 IPsec/L2TP VPN 客户端](clients-zh.md)*
 

docs/clients-zh.md

@@ -1,6 +1,6 @@
 ## 配置 IPsec/L2TP VPN 客户端
 
-*Read this in other languages: [English](clients.md), [简体中文](clients-zh.md).*
+*其他语言版本: [English](clients.md), [简体中文](clients-zh.md).*
 
 *如需使用 IPsec/XAuth 模式连接，请参见： [配置 IPsec/XAuth VPN 客户端](clients-xauth-zh.md)*
 

docs/uninstall-zh.md

@@ -0,0 +1,77 @@
+# 卸载 VPN
+
+*其他语言版本: [English](uninstall.md), [简体中文](uninstall-zh.md).*
+
+按照以下步骤移除 VPN。这些命令需要用 `root` 账户运行，或者使用 `sudo`。
+
+## 步骤
+
+* [第一步](#第一步)
+* [第二步](#第二步)
+* [第三步](#第三步)
+* [第四步](#第四步)
+* [可选步骤](#可选步骤)
+* [完成后操作](#完成后操作)
+
+## 第一步
+
+```
+service ipsec stop
+service xl2tpd stop
+rm -rf /usr/local/sbin/ipsec /usr/local/libexec/ipsec
+rm -f /etc/init.d/ipsec /lib/systemd/system/ipsec.service
+```
+
+## 第二步
+
+### Ubuntu/Debian
+
+`apt-get remove xl2tpd`
+
+### CentOS/RHEL
+
+`yum remove xl2tpd`
+
+## 第三步
+
+### Ubuntu/Debian
+
+编辑 `/etc/iptables.rules` 并删除不需要的规则。   
+你以前的防火墙规则（如果有）会备份在 `/etc/iptables.rules.old-date-time`。   
+另外如果文件 `/etc/iptables/rules.v4` 存在，请编辑它。   
+如果使用 IPv6 ，还需编辑 `/etc/ip6tables.rules` 和/或 `/etc/iptables/rules.v6`。
+
+### CentOS/RHEL
+
+编辑 `/etc/sysconfig/iptables` 并删除不需要的规则。   
+如果使用 IPv6 ，还需编辑 `/etc/sysconfig/ip6tables`。
+
+## 第四步
+
+编辑 `/etc/sysctl.conf` 并删除该标记后面的行： `# Added by hwdsl2 VPN script`。   
+编辑 `/etc/rc.local` 并删除该标记后面的行： `# Added by hwdsl2 VPN script`。*不要删除 `exit 0` （如果有）*。
+
+## 可选步骤
+
+删除这些配置文件：
+
+* /etc/ipsec.conf
+* /etc/ipsec.secrets
+* /etc/xl2tpd/xl2tpd.conf
+* /etc/ppp/options.xl2tpd
+* /etc/ppp/chap-secrets
+* /etc/ipsec.d/*
+* /etc/pam.d/pluto
+* /etc/sysconfig/pluto
+
+要快速删除，可以复制并粘贴以下命令：
+
+`rm -f /etc/ipsec.conf /etc/ipsec.secrets /etc/xl2tpd/xl2tpd.conf /etc/ppp/options.xl2tpd /etc/ppp/chap-secrets /etc/ipsec.d/* /etc/pam.d/pluto /etc/sysconfig/pluto`
+
+删除 Libreswan 源目录：
+
+`rm -rf /opt/src/libreswan-*`
+
+## 完成后操作
+
+重启你的服务器。

docs/uninstall.md

@@ -1,6 +1,8 @@
-# Uninstall IPsec/L2TP VPN
+# Uninstall the VPN
 
-To remove the VPN:
+*Read this in other languages: [English](uninstall.md), [简体中文](uninstall-zh.md).*
+
+Follow these steps to remove the VPN. Commands must be run as `root`, or with `sudo`.
 
 ## Steps
 
@@ -12,46 +14,47 @@ To remove the VPN:
 * [When finished](#when-finished)
 
 ## First step
+
 ```
 service ipsec stop
 service xl2tpd stop
 rm -rf /usr/local/sbin/ipsec /usr/local/libexec/ipsec
 rm -f /etc/init.d/ipsec /lib/systemd/system/ipsec.service
-rm -rf /opt/src/libreswan-*
 ```
 
 ## Second step
 
-### For Ubuntu/Debian:
+### Ubuntu/Debian
 
 `apt-get remove xl2tpd`
 
-### For CentOS/RHEL:
+### CentOS/RHEL
 
 `yum remove xl2tpd`
 
 ## Third step
 
-### For Ubuntu/Debian: 
+### Ubuntu/Debian
 
 Edit `/etc/iptables.rules` and remove unneeded rules.   
 Your original rules (if any) are backed up as `/etc/iptables.rules.old-date-time`.   
 In addition, edit `/etc/iptables/rules.v4` if the file exists.   
-If using IPv6, also edit `/etc/ip6tables.rules` and `/etc/iptables/rules.v6`.
+If using IPv6, also edit `/etc/ip6tables.rules` and/or `/etc/iptables/rules.v6`.
 
-### For CentOS/RHEL: 
+### CentOS/RHEL
 
-Edit `/etc/sysconfig/iptables` and `/etc/sysconfig/ip6tables`
+Edit `/etc/sysconfig/iptables` and remove unneeded rules.   
+If using IPv6, also edit `/etc/sysconfig/ip6tables`.
 
 ## Fourth step
 
-Edit `/etc/sysctl.conf` and remove the lines after `# Added by hwdsl2 VPN script`
+Edit `/etc/sysctl.conf` and remove the lines after `# Added by hwdsl2 VPN script`.   
-
+Edit `/etc/rc.local` and remove the lines after `# Added by hwdsl2 VPN script`, *except exit 0 (if any)*.
-Edit `/etc/rc.local` and remove the lines after `# Added by hwdsl2 VPN script`, *except exit 0 (if any)*
 
 ## Optional
 
 Remove these config files:
+
 * /etc/ipsec.conf
 * /etc/ipsec.secrets
 * /etc/xl2tpd/xl2tpd.conf
@@ -61,9 +64,13 @@ Remove these config files:
 * /etc/pam.d/pluto
 * /etc/sysconfig/pluto
 
-copy && paste for fast remove:
+Copy and paste for fast removal:
 
-`sudo rm -f /etc/ipsec.conf /etc/ipsec.secrets /etc/xl2tpd/xl2tpd.conf /etc/ppp/options.xl2tpd /etc/ppp/chap-secrets /etc/ipsec.d/* /etc/pam.d/pluto /etc/sysconfig/pluto`
+`rm -f /etc/ipsec.conf /etc/ipsec.secrets /etc/xl2tpd/xl2tpd.conf /etc/ppp/options.xl2tpd /etc/ppp/chap-secrets /etc/ipsec.d/* /etc/pam.d/pluto /etc/sysconfig/pluto`
+
+Remove Libreswan source directory:
+
+`rm -rf /opt/src/libreswan-*`
 
 ## When finished