效果如图

vi ~/.bashrc

# shell show git branch name
function git_branch {
        branch="`git branch 2>/dev/null | grep "^\*" | sed -e "s/^\*\ //"`"
        if [ "${branch}" != "" ];then
                if [ "${branch}" = "(no branch)" ];then
                        branch="(`git rev-parse --short HEAD`...)"
                fi
                echo "($branch)"
        fi
}
export PS1='\u@:\w\[\033[01;32m\]$(git_branch)\[\033[00m\]\$ '

样式可以自己设置PS1的值

参考https://blog.csdn.net/u012219045/article/details/85329602