修改 OS X 终端中的 Bash 提示前缀
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Modify Bash prompt prefix in OS X terminal
提问by sidegeeks
I have a massive prompt taking my Terminal's space "names-MacBook-Pro" on the same line where the command is entered on every line.
我有一个巨大的提示，在每一行输入命令的同一行上输入我终端的空间“名称s-MacBook-Pro”。
Is there a way I can remove this or make it shorter?
有没有办法可以删除它或缩短它？
回答by davidcondrey
Your prompt is set by the environment variable PS1. This is set by the system in /private/etc/bashrc, but it is usually modified by the user in your dotfiles within your home directory.
您的提示由环境变量设置PS1。这是由系统在 中设置的/private/etc/bashrc，但通常由用户在主目录中的点文件中修改。
Check what it is currently set as using this command:
使用此命令检查当前设置的内容：
echo $PS1
Modify it by setting the variable in your ~/.bash_profile(or wherever you have defined it previously):
通过在您的~/.bash_profile（或您之前定义的任何地方）中设置变量来修改它：
export PS1="$"
Reload the settings from your dotfiles by doing:
通过执行以下操作从您的点文件重新加载设置：
source ~/.bash_profile
This will make your new shell prompt simply a $
这将使您的新 shell 提示符变得简单 $
Prompt variables
提示变量
PS1: Primary prompt string. The default value is\s-\v\$ .PS2: Secondary prompt string. The default is>PS3: Prompt for theselectcommandPS4: Printed before each command Bash displays during an execution trace. The first character ofPS4is replicated multiple times, as necessary, to indicate multiple levels of indirection. The default is+
PS1: 主要提示字符串。默认值为\s-\v\$ .PS2: 次要提示字符串。默认是>PS3: 提示输入select命令PS4：在执行跟踪期间 Bash 显示的每个命令之前打印。的第一个字符PS4根据需要多次复制，以指示多个间接级别。默认是+
Syntax (from the Bash manual)
语法（来自 Bash手册）
\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 ##代码## (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
