修改 OS X 终端中的 Bash 提示前缀 [关闭]

Question

我在终端的空间“names-MacBook-Pro”上有一个巨大的提示，在每一行输入命令的同一行。

有没有办法可以删除它或缩短它？

Answer 1

您的提示由环境变量PS1 设置。这是由系统在/private/etc/bashrc 中设置的，但它通常由用户在您的主目录中的点文件中进行修改。

使用此命令检查当前设置的内容：

echo $PS1

通过在您的~/.bash_profile（或您之前定义的任何地方）中设置变量来修改它：

export PS1="$"

通过执行以下操作从您的点文件重新加载设置：

source ~/.bash_profile

这将使您的新 shell 提示符只是一个 $

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提示变量

• PS1 ：主要提示字符串。默认值为\s-\v\$ .
• PS2 ：辅助提示字符串。默认为>
• PS3 ：提示select 命令
• PS4 ：在执行跟踪期间 Bash 显示的每个命令之前打印。 PS4 的第一个字符会根据需要重复多次，以指示多个间接级别。默认为+

语法（来自 Bash manual）

\a : An ASCII bell character (07)
\d : The date in “Weekday Month Date” format (e.g., “Tue May 26”)
\D{format} : the format is passed to strftime(3) and the result is inserted into the prompt string; an empty format results in a locale-specific time representation. The braces are required
\e : An ASCII escape character (033)
\h : The hostname up to the first ‘.’
\H : The hostname
\j : The number of jobs currently managed by the shell
\l : The basename of the shell's terminal device name
\n : Newline
\r : Carriage return
\s : The name of the shell, the basename of $0 (the portion following the final slash)
\t : The current time in 24-hour HH:MM:SS format
\T : The current time in 12-hour HH:MM:SS format
\@ : The current time in 12-hour am/pm format
\A : The current time in 24-hour HH:MM format
\u : The username of the current user
\v : The version of Bash (e.g., 2.00)
\V : The release of Bash, version + patch level (e.g., 2.00.0)
\w : The current working directory, with $HOME abbreviated with a tilde
\W : The basename of the current working directory, with $HOME abbreviated with a tilde
\! : The history number of this command
\# : The command number of this command
\$ : If the effective UID is 0, a #, otherwise a $
\nnn : the character corresponding to the octal number nnn
\\ : A backslash
\[ : Begin a sequence of non-printing characters, which could be used to embed a terminal control sequence into the prompt
\] : end a sequence of non-printing characters