1.编辑系统文件

CentOS/RHEL

编辑系统.bashrc文件

注意：.bashrc是一个隐藏的文件，如果无法打开需要用ls -a命令找到.bashrc文件，然后再打开即可；
编辑文件：vi ~/.bashrc
找到代码：#force_color_prompt=yes
替换其为：force_color_prompt=yes

继续编辑.bashrc文件，颜色设置在if [ "$color_prompt" = yes ]; then的下面一行，替换掉其代码即可；

• 原始代码

    PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ '

• 替换代码

    PS1='${debian_chroot:+($debian_chroot)}\[\033[01;31m\]\u\[\033[01;33m\]@\[\033[01;36m\]\h \[\033[01;33m\]\w \[\033[01;35m\]\$ \[\033[00m\]'

Debian/Ubuntu

• 需在用户.bashrc 添加

force_color_prompt=yes

if [ -n "$force_color_prompt" ]; then
    if [ -x /usr/bin/tput ] && tput setaf 1 >&/dev/null; then
	# We have color support; assume it's compliant with Ecma-48
	# (ISO/IEC-6429). (Lack of such support is extremely rare, and such
	# a case would tend to support setf rather than setaf.)
	color_prompt=yes
    else
	color_prompt=
    fi
fi

if [ "$color_prompt" = yes ]; then
    PS1='${debian_chroot:+($debian_chroot)}\[\033[01;31m\]\u\[\033[01;33m\]@\[\033[01;36m\]\h \[\033[01;33m\]\w \[\033[01;35m\]\$ \[\033[00m\]'
else
    PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w\$ '
fi

2.生效

source .bashrc        # CentOS/RHEL