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`~#` 是 bash 的波形符扩展吗？

tag-icon • tag-icon bash bash-expansion
`~#` 是 bash 的波形符扩展吗？

波浪号是~#bash 的扩展吗？我没有找到它https://www.gnu.org/software/bash/manual/html_node/Tilde-Expansion.html。我的问题来自https://unix.stackexchange.com/a/506532/674。谢谢。

$ ~#
The following connections are open:
  #0 client-session (t4 r0 i0/0 o0/0 fd 5/6 cc -1)
  #1 x11 (t4 r3 i0/0 o0/0 fd 8/8 cc -1)

答案1

ssh不，它是列出转发连接的特殊转义代码。显然，您已通过 SSH 连接连接到 shell。

bash~#如果您在命令行中键入，它本身将响应“未找到命令” ：

$ ~#
bash: ~#: command not found

请注意，要键入~ 进入外壳作为按 后的第一个字符，如果您的 shell 位于 SSH 连接的另一端，则由于这些转义码，Enter您将必须按两次。~

其他可用的命令列于手册ssh​（这些需要作为按后的第一个字符输入Enter）：

 ~.      Disconnect.

 ~^Z     Background ssh.

 ~#      List forwarded connections.

 ~&      Background ssh at logout when waiting for forwarded connection /
         X11 sessions to terminate.

 ~?      Display a list of escape characters.

 ~B      Send a BREAK to the remote system (only useful if the peer
         supports it).

 ~C      Open command line.  Currently this allows the addition of port
         forwardings using the -L, -R and -D options (see above).  It also
         allows the cancellation of existing port-forwardings with
         -KL[bind_address:]port for local, -KR[bind_address:]port for
         remote and -KD[bind_address:]port for dynamic port-forwardings.
         !command allows the user to execute a local command if the
         PermitLocalCommand option is enabled in ssh_config(5).  Basic
         help is available, using the -h option.

 ~R      Request rekeying of the connection (only useful if the peer
         supports it).

 ~V      Decrease the verbosity (LogLevel) when errors are being written
         to stderr.

 ~v      Increase the verbosity (LogLevel) when errors are being written
         to stderr.

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