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Tim
Asked: 2019-03-22 15:09:10 +0800 CST

`~#` 是 bash 的波浪号扩展吗？

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是~#bash 的波浪号扩展吗？我在https://www.gnu.org/software/bash/manual/html_node/Tilde-Expansion.html中找不到它。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)
bash bash-expansion

1 个回答

  1. Best Answer

    不，这是ssh列出转发连接的特殊转义码。您显然是通过 SSH 连接连接到您的外壳的。

    bash~#如果您在命令行上键入，它本身将响应“找不到命令” ：

    $ ~#
bash: ~#: command not found

    请注意，要在按下 之后将 an 作为第一个字符输入~ 到 shell中，如果你的 shell 位于 SSH 连接的另一端，Enter则必须按两次，这只是因为这些转义码。~

    手册中列出了其他可用命令（ssh这些命令需要在按 后作为第一个字符输入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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