Prompting - PS1 Setting

一、快捷安装

sudo wget https://raw.githubusercontent.com/tkstorm/ldenv/master/ps1.sh -O /etc/profile.d/ps1.sh

然后执行bash -l或者打开新的终端查看信息

二、ps1.sh 具体内容

/etc/profile.d/ps1.sh,相当于重新设置了 PS1 的参数,设置带颜色的提示

export PS1='\n\
[\[\e[32m\]\u\[\e[0m\]\
@\
\[\e[35m\]\h \
\[\e[36;1m\]\w\
\[\e[0m\]] \
$(RETVAL="$?"; echo -en "\e[33m{$(date +'%H:%M:%S')} ";
  if [ "$RETVAL" -eq 0 ];then
                echo -en "\[\e[32m\]($RETVAL)"
        else
                echo -en "\[\e[31;1m\a\]($RETVAL)"
  fi)\n\
\[\e[0;1;34m\]\$ \[\e[0m\]'

三、PS1 提示符相关说明

通过man bash,搜索关键字PROMPTING

\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

四、参考