截图：Shift+print Screen

安装i386支持

1、apt-get install lib32ncurses5 ​
2、apt-get install lib32z1

查看操作系统是多少位的

１．getconf  LONG_BIT
２．uname  -a
３．dpkg --print-architecture

安装GDB增强工具gef

#via the install script
$ wget -q -O- https://github.com/hugsy/gef/raw/master/scripts/gef.sh | sh
#manually
$ wget -O ~/.gdbinit-gef.py -q https://github.com/hugsy/gef/raw/master/gef.py
$ echo source ~/.gdbinit-gef.py >> ~/.gdbinit

VirtualBox安装系统在机械硬盘上关机后打不开系统
启动虚拟机系统，弹出报错框提示无法启动：

The virtual machine ‘cntos7.1’ has terminated unexpectedly during startup with exit code 1.

返回 代码:
NS_ERROR_FAILURE (0x80004005)
组件:
Machine
界面:
IMachine {662c175e-a69d-40b8-a77a-1d719d0ab062}

解决方法

重新安装VirtualBox内核驱动：

cd /etc/init.d/
./virtualbox start

参考：https://blog.csdn.net/scorpio3k/article/details/48845737