这个设置可以显示一个两行的提示符，它有如下特点：
# Below are the color init strings for the basic file types. A color init
# string consists of one or more of the following numeric codes:
# Attribute codes:
# 00=none 01=bold 04=underscore 05=blink 07=reverse 08=concealed
# Text color codes:
# 30=black 31=red 32=green 33=yellow 34=blue 35=magenta 36=cyan 37=white
# Background color codes:
# 40=black 41=red 42=green 43=yellow 44=blue 45=magenta 46=cyan 47=white
# ==================================================================
# some colors
none="\[\033[0m\]"
black="\[\033[0;30m\]"
dark_gray="\[\033[1;30m\]"
blue="\[\033[0;34m\]"
light_blue="\[\033[1;34m\]"
green="\[\033[0;32m\]"
light_green="\[\033[1;32m\]"
cyan="\[\033[0;36m\]"
light_cyan="\[\033[1;36m\]"
red="\[\033[0;31m\]"
light_red="\[\033[1;31m\]"
purple="\[\033[0;35m\]"
light_purple="\[\033[1;35m\]"
brown="\[\033[0;33m\]"
yellow="\[\033[1;33m\]"
light_gray="\[\033[0;37m\]"
white="\[\033[1;37m\]"
# display_clock()
# > display a clock in the upper-righthand corner
function display_clock {
LIGHT_BLUE="$(tput setaf 4; tput bold)"
DEFAULT="$(tput sgr0)"
CLOCK="[$LIGHT_BLUE$(date +%H:%M:%S)$DEFAULT]"
# <columns in display> - len($CLOCK)
let UPPER_RIGHT=$(tput cols)-10
tput sc
tput cup 0 ${UPPER_RIGHT}
echo -n ${CLOCK}
tput rc
}
function set_hist_color {
# $? - exit value of last command
local ERR_in=$?
ERR="[$ERR_in]"
if [ $ERR_in -gt 0 ]
then
HIST_COLOR="1;31" # failure
else
HIST_COLOR="1;32" # success
ERR=
fi
}
# set TTY_COLOR to current (tty-number mod 8)+30
function set_tty_color {
local rem color
let rem=`tty | sed -e 's/.*\/\(tty\)\?//'`%8
let color=rem+30
TTY_COLOR="1;$color"
}
function set_user_color {
local u_color_in
let u_color_in=`id -u`%8+30
USER_COLOR="1;${u_color_in}"
#purple="\[\033[0;35m\]"
if [ `id -u` -eq 0 ] ; then
USER_COLOR="1;31"
fi
}
# ==================================================================
# prompt_command()
# > commands to run before each prompt display
function prompt_command {
set_hist_color
set_tty_color
set_user_color
#display_clock
# for screen title setting
echo -n -e "\033k\033\134"
}
function color_prompt
{
PROMPT_COMMAND=prompt_command
local current_tty=`tty | sed -e "s/\/dev\/\(.*\)/\1/"`
PS1="$dark_gray> \033[\$(echo -n \$TTY_COLOR)m\]$current_tty \033[\$(echo -n \$USER_COLOR)m\]\u$dark_gray@$purple\H$dark_gray:$light_blue\w\n$dark_gray> $cyan\t \033[\$(echo -n \$HIST_COLOR)m\]\$ERR\033[\$(echo -n \$TTY_COLOR)m\]"'\$'"$none "
PS2="$dark_gray>$none "
}
function dynamic_prompt {
# Colour Macros
BLUE='\[\033[0;34m\]'
LIGHT_CYAN='\[\033[1;36m\]'
WHITE='\[\033[1;37m\]'
DEFAULT='\[\033[0m\]'
# Pre-Prompt Function
PROMPT_COMMAND=prompt_command
# Prompt
# \! - history number of last command
# $? - exit value of last command
# \t - exit time of last command
# \w - current directory (relative)
PS1="$BLUE[\[\033[\$(echo -n \$HIST_COLOR)m\]\!$BLUE] $WHITE\w$LIGHT_CYAN\$ $DEFAULT"
}
function top_prompt
{
# If running interactively, then:
if [ "$PS1" ]; then
local top_prompt_color="\[\033[1;30;46m\]"
# set the prompt
PS1="$(tput sc)$(tput cup 0 0)$(tput el)$top_prompt_color \w : \u@\H { \$(date +%T) }$(tput rc)$"
# move one line
tput cup 1 0
fi
}
function plain_prompt
{
local current_tty=`tty | sed -e "s/\/dev\/\(.*\)/\1/"`
PS1="> $current_tty \u@\H:\w\n> \$? \t \! "'\$'" "
PS2="> "
}
function fancy_three_line_prompt
{
PS1='\[\033[0m\]\[\033[0;31m\].:\[\033[0m\]\[\033[1;30m\][\[\033[0m\]\[\033[0;28m\]Managing \033[1;31m\]\j\[\033[0m\]\[\033[1;30m\]/\[\033[0m\]\[\033[1;31m\]$(ps ax | wc -l | tr -d '\'' '\'')\[\033[0m\]\[\033[1;30m\] \[\033[0m\]\[\033[0;28m\]jobs.\[\033[0m\]\[\033[1;30m\]] [\[\033[0m\]\[\033[0;28m\]CPU Load: \[\033[0m\]\[\033[1;31m\]$(temp=$(cat /proc/loadavg) && echo ${temp%% *}) \[\033[0m\]\[\033[0;28m\]Uptime: \[\033[0m\]\[\033[1;31m\]$(temp=$(cat /proc/uptime) && upSec=${temp%%.*} ; let secs=$((${upSec}%60)) ; let mins=$((${upSec}/60%60)) ; let hours=$((${upSec}/3600%24)) ; let days=$((${upSec}/86400)) ; if [ ${days} -ne 0 ]; then echo -n ${days}d; fi ; echo -n ${hours}h${mins}m)\[\033[0m\]\[\033[1;30m\]]\[\033[0m\]\[\033[0;31m\]:.\n\[\033[0m\]\[\033[0;31m\].:\[\033[0m\]\[\033[1;30m\][\[\033[0m\]\[\033[1;31m\]$(ls -l | grep "^-" | wc -l | tr -d " ") \[\033[0m\]\[\033[0;28m\]files using \[\033[0m\]\[\033[1;31m\]$(ls --si -s | head -1 | awk '\''{print $2}'\'')\[\033[0m\]\[\033[1;30m\]] [\[\033[0m\]\[\033[1;31m\]\u\[\033[0m\]\[\033[0;31m\]@\[\033[0m\]\[\033[1;31m\]\h \[\033[0m\]\[\033[1;34m\]\w\[\033[0m\]\[\033[1;30m\]]\[\033[0m\]\[\033[0;31m\]:.\n\[\033[0m\]\[\033[0;31m\].:\[\033[0m\]\[\033[1;30m\][\[\033[0m\]\[\033[1;31m\]\t\[\033[0m\]\[\033[1;30m\]]\[\033[0m\]\[\033[0;31m\]:. \[\033[0m\]\[\033[1;37m\]$ \[\033[0m\]'
}
#some aliases to set fancy prompts
#see .bash_slyles for further informations
if [ -f ~/.bash_styles ];
then
alias dumb='. ~/.bash_styles dumb'
alias ice='. ~/.bash_styles ice'
alias fire='. ~/.bash_styles fire'
alias nature='. ~/.bash_styles nature'
alias sunshine='. ~/.bash_styles sunshine'
alias dream='. ~/.bash_styles dream'
alias magic='. ~/.bash_styles magic'
alias iceg='. ~/.bash_styles iceg'
alias topline='. ~/.bash_styles topline'
fi
# Actions
color_prompt