想必在命令行模式用久了，都看厌了那个单调又丑的提示符，个人认为还占了些位，要是命令长的话还会断行.

想改成

cd ~/
touch.bash_profile
vim .bash_profile

osx环境下操作的，关键语法 \[颜色\]prompt参数\[$reset\] 例如：\[$red\]\t\[$reset\]

reset=$(tput sgr0)
green=$(tput setaf 2)
yellow=$(tput setaf 3)
blue=$(tput setaf 4)
magenta=$(tput setaf 5)
cyan=$(tput setaf 6)PS1="\[$magenta\]\u\[$reset\] at \[$blue\]\h\[$reset\] in \[$yellow\]\W\n\[$reset\]\[$green\]\$\[$reset\]"export PS1

:wq 保存离开

source .bash_profile

tput命令使用方式

prompt参数:

• \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(换行)
• \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

文章参考，文章参考2