【解决方案】git clone报错：(gnome-ssh-askpass:24859): Gtk-WARNING **: cannot open display:

CentOS release 6.10 (Final)

解决方案：

输入命令，临时生效：unset SSH_ASKPASS

修改配置，永久生效：

    1.vi ~/.bash_profile

    2.添加  export GIT_ASKPASS=

    3.使生效：. ~/.bash_profile