Linux prompt format and color

# Prompt color scheme:

Color Black Red Green Yellow Blue Purple Green White
Font 3,031,323,334,353,637
BACKGROUND 4,041,424,344,454,647

备注：特殊显示     
     "1" 高亮       颜色格式：
     "4" 下划线     [\e[字体、背景m]
     "5" 闪烁  
     "7" 反色调  
     "8" 颜色不可见

Reference color: green

↓
   PS1="\e[1;32m\][\u@\h \w]\\$\e[0m\]"
↓
  写入/etc/profile文件全局生效
    vim /etc/profile
↓
  将PS1写入PATH变量
     PS1="$PATH:"