diff --git a/docs/manage-users-zh.md b/docs/manage-users-zh.md
index 67f7c48..cdf8bf7 100644
--- a/docs/manage-users-zh.md
+++ b/docs/manage-users-zh.md
@@ -42,57 +42,86 @@ service xl2tpd restart
 
 ## 使用辅助脚本管理 VPN 用户
 
-你可以使用这些脚本来更方便地管理 VPN 用户：[add_vpn_user.sh](../extras/add_vpn_user.sh), [del_vpn_user.sh](../extras/del_vpn_user.sh) 和 [update_vpn_users.sh](../extras/update_vpn_users.sh)。它们将同时更新 IPsec/L2TP 和 IPsec/XAuth ("Cisco IPsec") 模式的用户。将下面的命令的参数换成你自己的值。对于 IKEv2，参见 [管理客户端证书](ikev2-howto-zh.md#管理客户端证书)。
+你可以使用辅助脚本 [添加](../extras/add_vpn_user.sh), [删除](../extras/del_vpn_user.sh) 或者 [更新所有的](../extras/update_vpn_users.sh) VPN 用户。它们将同时更新 IPsec/L2TP 和 IPsec/XAuth ("Cisco IPsec") 模式的用户。对于 IKEv2 模式，请另外参见 [管理客户端证书](ikev2-howto-zh.md#管理客户端证书)。
 
-**注：** VPN 用户信息保存在文件 `/etc/ppp/chap-secrets` 和 `/etc/ipsec.d/passwd`。脚本在修改这些文件之前会先做备份，使用 `.old-日期-时间` 为后缀。
+**注：** 将下面的命令的参数换成你自己的值。VPN 用户信息保存在文件 `/etc/ppp/chap-secrets` 和 `/etc/ipsec.d/passwd`。脚本在修改这些文件之前会先做备份，使用 `.old-日期-时间` 为后缀。
 
 ### 添加或更改一个 VPN 用户
 
 添加一个新 VPN 用户，或者为一个已有的 VPN 用户更改密码。
 
+运行脚本并按提示操作：
+
 ```bash
-# 下载脚本
-wget -nv -O add_vpn_user.sh https://bit.ly/addvpnuser
-# 运行脚本并按提示操作
-sudo bash add_vpn_user.sh
+sudo addvpnuser.sh
 ```
 
+<details>
+<summary>
+错误："sudo: addvpnuser.sh: command not found".
+</summary>
+
+如果你使用了较早版本的 VPN 安装脚本，这是正常的。首先下载辅助脚本：
+
+```bash
+wget -nv -O /opt/src/addvpnuser.sh https://bit.ly/addvpnuser
+chmod +x /opt/src/addvpnuser.sh && ln -s /opt/src/addvpnuser.sh /usr/bin
+```
+
+然后按照说明运行脚本。
+</details>
+
 另外，你也可以在添加参数的情况下运行脚本：
 
 ```bash
 # 所有变量值必须用 '单引号' 括起来
 # *不要* 在值中使用这些字符：  \ " '
-sudo bash add_vpn_user.sh '要添加的用户名' '密码'
+sudo addvpnuser.sh '要添加的用户名' '密码'
 # 或者
-sudo bash add_vpn_user.sh '要更新的用户名' '新密码'
+sudo addvpnuser.sh '要更新的用户名' '新密码'
 ```
 
 ### 删除一个 VPN 用户
 
 删除指定的 VPN 用户。
 
+运行脚本并按提示操作：
+
 ```bash
-# 下载脚本
-wget -nv -O del_vpn_user.sh https://bit.ly/delvpnuser
-# 运行脚本并按提示操作
-sudo bash del_vpn_user.sh
+sudo delvpnuser.sh
 ```
 
+<details>
+<summary>
+错误："sudo: delvpnuser.sh: command not found".
+</summary>
+
+如果你使用了较早版本的 VPN 安装脚本，这是正常的。首先下载辅助脚本：
+
+```bash
+wget -nv -O /opt/src/delvpnuser.sh https://bit.ly/delvpnuser
+chmod +x /opt/src/delvpnuser.sh && ln -s /opt/src/delvpnuser.sh /usr/bin
+```
+
+然后按照说明运行脚本。
+</details>
+
 另外，你也可以在添加参数的情况下运行脚本：
 
 ```bash
 # 所有变量值必须用 '单引号' 括起来
 # *不要* 在值中使用这些字符：  \ " '
-sudo bash del_vpn_user.sh '要删除的用户名'
+sudo delvpnuser.sh '要删除的用户名'
 ```
 
 ### 更新所有的 VPN 用户
 
 移除所有的 VPN 用户并替换为你指定的列表中的用户。
 
+首先下载脚本：
+
 ```bash
-# 下载脚本
-wget -nv -O update_vpn_users.sh https://bit.ly/updatevpnusers
+wget -nv -O updatevpnusers.sh https://bit.ly/updatevpnusers
 ```
 
 要使用这个脚本，从以下选项中选择一个：
@@ -102,9 +131,9 @@ wget -nv -O update_vpn_users.sh https://bit.ly/updatevpnusers
 **选项 1:** 编辑脚本并输入 VPN 用户信息：
 
 ```bash
-nano -w update_vpn_users.sh
+nano -w updatevpnusers.sh
 [替换为你自己的值： YOUR_USERNAMES 和 YOUR_PASSWORDS]
-sudo bash update_vpn_users.sh
+sudo bash updatevpnusers.sh
 ```
 
 **选项 2:** 将 VPN 用户信息定义为环境变量：
@@ -116,7 +145,7 @@ sudo bash update_vpn_users.sh
 sudo \
 VPN_USERS='用户名1 用户名2 ...' \
 VPN_PASSWORDS='密码1 密码2 ...' \
-bash update_vpn_users.sh
+bash updatevpnusers.sh
 ```
 
 ## 手动管理 VPN 用户
diff --git a/docs/manage-users.md b/docs/manage-users.md
index ce7d5ce..48ede0e 100644
--- a/docs/manage-users.md
+++ b/docs/manage-users.md
@@ -42,57 +42,86 @@ For IPsec/XAuth ("Cisco IPsec"), VPN users are specified in `/etc/ipsec.d/passwd
 
 ## Manage VPN users using helper scripts
 
-You may use these scripts to more easily manage VPN users: [add_vpn_user.sh](../extras/add_vpn_user.sh), [del_vpn_user.sh](../extras/del_vpn_user.sh) and [update_vpn_users.sh](../extras/update_vpn_users.sh). They will update users for both IPsec/L2TP and IPsec/XAuth ("Cisco IPsec"). Replace command parameters below with your own values. For IKEv2, see [Manage client certificates](ikev2-howto.md#manage-client-certificates).
+You may use helper scripts to [add](../extras/add_vpn_user.sh), [delete](../extras/del_vpn_user.sh) or [update all](../extras/update_vpn_users.sh) VPN users for both IPsec/L2TP and IPsec/XAuth ("Cisco IPsec") modes. For IKEv2 mode, please instead see [Manage client certificates](ikev2-howto.md#manage-client-certificates).
 
-**Note:** VPN users are stored in `/etc/ppp/chap-secrets` and `/etc/ipsec.d/passwd`. The scripts will backup these files before making changes, with `.old-date-time` suffix.
+**Note:** Replace command arguments below with your own values. VPN users are stored in `/etc/ppp/chap-secrets` and `/etc/ipsec.d/passwd`. The scripts will backup these files before making changes, with `.old-date-time` suffix.
 
 ### Add or edit a VPN user
 
 Add a new VPN user, or update an existing VPN user with a new password.
 
+Run the script and follow the prompts:
+
 ```bash
-# Download the script
-wget -nv -O add_vpn_user.sh https://bit.ly/addvpnuser
-# Run the script and follow the prompts
-sudo bash add_vpn_user.sh
+sudo addvpnuser.sh
 ```
 
+<details>
+<summary>
+Error: "sudo: addvpnuser.sh: command not found".
+</summary>
+
+This is normal if you used an older version of the VPN setup script. First, download the helper script:
+
+```bash
+wget -nv -O /opt/src/addvpnuser.sh https://bit.ly/addvpnuser
+chmod +x /opt/src/addvpnuser.sh && ln -s /opt/src/addvpnuser.sh /usr/bin
+```
+
+Then run the script using the instructions.
+</details>
+
 Alternatively, you can run the script with arguments:
 
 ```bash
 # All values MUST be placed inside 'single quotes'
 # DO NOT use these special characters within values: \ " '
-sudo bash add_vpn_user.sh 'username_to_add' 'password'
+sudo addvpnuser.sh 'username_to_add' 'password'
 # OR
-sudo bash add_vpn_user.sh 'username_to_update' 'new_password'
+sudo addvpnuser.sh 'username_to_update' 'new_password'
 ```
 
 ### Delete a VPN user
 
 Delete the specified VPN user.
 
+Run the script and follow the prompts:
+
 ```bash
-# Download the script
-wget -nv -O del_vpn_user.sh https://bit.ly/delvpnuser
-# Run the script and follow the prompts
-sudo bash del_vpn_user.sh
+sudo delvpnuser.sh
 ```
 
+<details>
+<summary>
+Error: "sudo: delvpnuser.sh: command not found".
+</summary>
+
+This is normal if you used an older version of the VPN setup script. First, download the helper script:
+
+```bash
+wget -nv -O /opt/src/delvpnuser.sh https://bit.ly/delvpnuser
+chmod +x /opt/src/delvpnuser.sh && ln -s /opt/src/delvpnuser.sh /usr/bin
+```
+
+Then run the script using the instructions.
+</details>
+
 Alternatively, you can run the script with arguments:
 
 ```bash
 # All values MUST be placed inside 'single quotes'
 # DO NOT use these special characters within values: \ " '
-sudo bash del_vpn_user.sh 'username_to_delete'
+sudo delvpnuser.sh 'username_to_delete'
 ```
 
 ### Update all VPN users
 
 Remove all existing VPN users and replace with the list of users you specify.
 
+First, download the script:
+
 ```bash
-# Download the script
-wget -nv -O update_vpn_users.sh https://bit.ly/updatevpnusers
+wget -nv -O updatevpnusers.sh https://bit.ly/updatevpnusers
 ```
 
 To use this script, choose one of the following options:
@@ -102,9 +131,9 @@ To use this script, choose one of the following options:
 **Option 1:** Edit the script and enter VPN user details:
 
 ```bash
-nano -w update_vpn_users.sh
+nano -w updatevpnusers.sh
 [Replace with your own values: YOUR_USERNAMES and YOUR_PASSWORDS]
-sudo bash update_vpn_users.sh
+sudo bash updatevpnusers.sh
 ```
 
 **Option 2:** Define VPN user details as environment variables:
@@ -116,7 +145,7 @@ sudo bash update_vpn_users.sh
 sudo \
 VPN_USERS='username1 username2 ...' \
 VPN_PASSWORDS='password1 password2 ...' \
-bash update_vpn_users.sh
+bash updatevpnusers.sh
 ```
 
 ## Manually manage VPN users