add figures to illustrate ssh forwardings

[Erchiusx]

我想干这个事很久了.jpg

为ssh forwarding添加了三幅箭图来说明这些forwarding的功能，
这些quiver由q.uiver.app 生成

[taoky]

?

[taoky]

不建议添加多余的 whitespace

[taoky]

文本建议包裹在 \textrm 里面，而命令包裹在 \texttt 里。

[taoky]

中英、中文与阿拉伯数字之间需要有空格。

[tiankaima]

Also if you don't mind, check out https://mermaid.js.org/, a LaTeX PNG probably wouldn't fit here (dark mode, text selection, etc.)

[Erchiusx]

Also if you don't mind, check out https://mermaid.js.org/, a LaTeX PNG probably wouldn't fit here (dark mode, text selection, etc.)

原来有mermaid插件，感谢提示

[Erchiusx]

感觉mermaid的准确排版能力还是略有点弱，尝试了半天之后画出来的长这样：

[iBug]

我觉得这篇 blog 里的图画得更好，考虑直接引用？

https://iximiuz.com/en/posts/ssh-tunnels/

[Erchiusx]

我觉得这篇 blog 里的图画得更好，考虑直接引用？

https://iximiuz.com/en/posts/ssh-tunnels/

确实，但又回到了那个问题

Also if you don't mind, check out https://mermaid.js.org/, a LaTeX PNG probably wouldn't fit here (dark mode, text selection, etc.)

Though not LaTeX, it still disallow text selection and wont fit in dark mode

[tiankaima]

我觉得这篇 blog 里的图画得更好，考虑直接引用？
https://iximiuz.com/en/posts/ssh-tunnels/

确实，但又回到了那个问题

Also if you don't mind, check out https://mermaid.js.org/, a LaTeX PNG probably wouldn't fit here (dark mode, text selection, etc.)

Though not LaTeX, it still disallow text selection and wont fit in dark mode

Dark mode and Text selection isn't a must per say. 我最开始在想既然你用 LaTeX 画了那么不如导出一个 SVG 然后 embed 进来，这样会好一点，然后我觉得 Mermaid 完全能做这件事情……

那个 blog 的图画的不错，我个人觉得会比这边 PR 里的图更直观一点，但是 copyright 的问题还是要注意一下。

然后稍等我来研究下 Mermaid 的问题

[iBug]

其实也可以直接插两张图片，这个主题是有 image auto switch 的支持的

https://squidfunk.github.io/mkdocs-material/reference/images/?h=dark#light-and-dark-mode

[tiankaima]

flowchart LR
    subgraph A[本地]
        direction TB
        local[程序或用户]
        localhost[主机]

        local --> localhost
    end

    subgraph B[远程]
        direction TB
        remote[主机]
        remoteService[服务]
        remote --> remoteService
    end

    localhost --> remote
    local --> remoteService

Loading

ok 所以 Mermaid 应该是没戏了，文档里写了 Limitation

If any of a subgraph's nodes are linked to the outside, subgraph direction will be ignored. Instead the subgraph will inherit the direction of the parent graph:

考虑画两张图吧，dark mode 下看亮色图片真的不怎么舒服