为什么波浪号 V 输出 ~V [LogLevel ERROR]？

Question

我使用的 GitHub 帐户的密码变体之一包含字符~V。当提示输入推送到 Github 的密码时，我输入了~V，然后输出

~V [LogLevel ERROR]

为什么是这样？

Answer 1

我认为您正在使用 SSH 会话。SSH 允许您使用某些“转义”序列向 SSH 本身（而不是您登录的 shell）发送特殊命令。从man ssh：

ESCAPE CHARACTERS
 When a pseudo-terminal has been requested, ssh supports a number of
 functions through the use of an escape character.

 A single tilde character can be sent as ~~ or by following the tilde by a
 character other than those described below.  The escape character must
 always follow a newline to be interpreted as special.  The escape
 character can be changed in configuration files using the EscapeChar
 configuration directive or on the command line by the -e option.

 The supported escapes (assuming the default ‘~’) are:
 ...

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

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

因此，如果您按下Enter用户名提示，那么~V作为密码的前两个字符，SSH 会将其解释为增加日志详细程度的命令。

因此，通过 SSH，要输入~V密码的前两个字符，可以：

1. 按~两次，以便将其视为文字~（根据上面引用的第二段）：~~V，或
2. 在提示开始时执行某些操作来中断序列（例如，键入一个字符并将其删除）。