提示符具体含义可参考： http://billie66.github.io/TLCL/book/zh/chap14.html
Ubuntu16.04个人配置如下，供以后查阅
1 function git_branch { 2 branch="`git branch 2>/dev/null | grep "^\*" | sed -e "s/^\*\ //"`" 3 if [ "${branch}" != "" ];then 4 if [ "${branch}" = "(no branch)" ];then 5 branch="(`git rev-parse --short HEAD`...)" 6 fi 7 echo " ($branch)" 8 fi 9 } 10 export PS1=‘\[\033[4;45m\]\u\[\033[00m\]@\h \[\033[01;36m\]\W\[\033[01;32m\]$(git_branch)\[\033[00m\]\$ ‘
原文：http://www.cnblogs.com/liown/p/7383497.html