全局生效:
放到/etc/bashrc最后一行
export PS1="[e[1;33m][e[0;33m][[e[1;32m]u[e[m][e[1;33m]@[e[m][e[1;35m]h[e[m][e[0;33m]] w$ [e[m]"退出重新登陆就可以了