docs: add MaixCam2 shell terminal login password

Add MaixCam2 login credentials (username: root, password: sipeed)
to the SSH connection instructions in both Chinese and English docs.

Author: liangzhuohua

docs/doc/en/basic/linux_basic.md

@@ -40,7 +40,7 @@ Here we mainly discuss transferring files through the network. Other methods can
 
 The terminal is a tool for communicating with and operating the Linux system, similar to Windows' `cmd` or `PowerShell`.
 
-For example, we can enter `ssh root@maixcam-xxxx.local` in the Terminal tool on a Windows system with PowerShell or on a Linux system. You can find the specific name in the device's `Settings->Device Information`, which allows us to connect to the device through the terminal (both username and password are `root` or `root` and `sipeed`).
+For example, we can enter `ssh root@maixcam-xxxx.local` in the Terminal tool on a Windows system with PowerShell or on a Linux system. You can find the specific name in the device's `Settings->Device Information`, which allows us to connect to the device through the terminal (the username and password of MaixCam and MaixCam Pro are both `root`; for MaixCam2, the username is `root` and the password is `sipeed`).
 
 Then, we can operate the device by entering commands. For instance, the `ls` command can list the files in the current directory of the device, while `cd` is used to switch to a different directory (similar to clicking folders in file management on a computer),
 

docs/doc/zh/basic/linux_basic.md

@@ -61,7 +61,7 @@ Linux 是一个开源操作系统内核，提供了操作系统基本的内容
 
 终端就是通过`终端`这个软件与 Linux 系统进行通信和操作的工具，类似于 Windows 的`cmd`或者`PowerShell`。
 
-比如我们可以在电脑的 Window 系统中的 powershell 或者 Linux系统中的 终端 工具中输入`ssh root@maixcam-xxxx.local` 这里具体的名字在设备的`设置->设备信息`中可以看到，这样我们就可以通过终端连接到设备了(用户名和密码都是`root`)。
+比如我们可以在电脑的 Window 系统中的 powershell 或者 Linux系统中的 终端 工具中输入`ssh root@maixcam-xxxx.local` 这里具体的名字在设备的`设置->设备信息`中可以看到，这样我们就可以通过终端连接到设备了(MaixCam和MaixCamPro的用户名和密码是`root`，MaixCam2的用户名是`root`，密码是`sipeed`)。
 然后我们通过输入命令来操作设备，比如`ls`命令可以列出设备文件系统中当前目录下的文件, `cd` 用来切换当前所在的目录（就像电脑文件管理中点击文件夹切换目录一样），
 ```shell
 cd /     # 切换到根目录
@@ -105,6 +105,7 @@ print("标准输出:", stdout.decode())
 print("标准错误:", stderr.decode())
 ```
 
+> 注意：MaixCam进入shell终端的用户名和密码都是`root`，MaixCam2进入shell终端的用户名是`root`，密码是`sipeed`。
 
 ## Linux 常用命令参考