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https://issues.apache.org/jira/browse/GUACAMOLE-1633?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17562990#comment-17562990
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Mike Jumper commented on GUACAMOLE-1633:
----------------------------------------
The behavior you describe is not due to a bug, but a console code sequence that
is not currently implemented: the alternate screen buffer. See:
https://stackoverflow.com/questions/11023929/using-the-alternate-screen-in-a-bash-script
> 【SSH】Exceptions occur when using vim, top, and other commands to roll back
> the buffer
> -------------------------------------------------------------------------------------
>
> Key: GUACAMOLE-1633
> URL: https://issues.apache.org/jira/browse/GUACAMOLE-1633
> Project: Guacamole
> Issue Type: Bug
> Components: guacamole
> Affects Versions: 1.2.0
> Reporter: wengcy
> Priority: Major
> Attachments: image-2022-07-06-14-08-38-966.png,
> image-2022-07-06-14-11-02-204.png, image-2022-07-06-14-18-23-551.png
>
>
> In SSH sessions, when you run vim, top, etc., the displayed data overwrites
> the recent rollback buffer.
> !image-2022-07-06-14-08-38-966.png!
> ⬆️ The image above shows the rollback buffer before I used vim, when the
> rollback buffer should hold the data from ll.
> !image-2022-07-06-14-11-02-204.png!
> ⬆️ However, after the vim command is used and the exit, the echo generated
> by ll command in the rollback buffer has been overwritten by the vim command.
> I know that the last page of data should be preserved after exiting using
> vim, but the data in the previous rollback buffer should not be lost, and I
> feel that this part of the processing like secureCRT is what we want.
> !image-2022-07-06-14-18-23-551.png!
> ⬆️ Just like this, after I use the vim command and exit, the previous ll
> command output will still exist, and the vim command will retain the state of
> the last screen before exiting.
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