甲骨文arm装了ubuntu sodu都不能使用

Xshell 7 (Build 0093)

Copyright (c) 2020 NetSarang Computer, Inc. All rights reserved.

Type `help' to learn how to use Xshell prompt.

[C:\~]$

Connecting to

Connection established.

To escape to local shell, press 'Ctrl+Alt+]'.

WARNING! The remote SSH server rejected X11 forwarding request.

Please login as the user "ubuntu" rather than the user "opc".

Connection closed.

Disconnected from remote host(新建会话) at 21:39:35.

Type `help' to learn how to use Xshell prompt.

[C:\~]$ sudo -i

'sudo' 不是内部或外部命令，也不是可运行的程序

或批处理文件。

[C:\~]$ sudo -i

'sudo' 不是内部或外部命令，也不是可运行的程序

或批处理文件。

[C:\~]$

我这需要教程了，大佬们