ifconfig安装, kernel下载和更新, virtualbox6.1启用嵌套VT-x/AMD-V 三个问题解决方案

• 终端链接虚拟机centos后安装网络工具包解决无法使用ifconfig命令

	# 查看root用户的环境变量是否有/sbin路径
	echo $PATH

	# 查看/sbin目录下有没有ifconfig命令
	ls /sbin|grep ifconfig

	# 查找可安装包
	yum search ifconfig

	# 安装
	sudo yum install net-tools.x86_64

• Update your kernel to the latest stable version provided by the repository.

	# Update the kernel
	yum update kernel -y
	
	# Install the kernel-headers, kernel-devel and other required packages
	yum install kernel-headers kernel-devel gcc make -y

	# Reboot the server to make sure it load to the new kernel
	init 6
	
	# The kernel version has been updated including the kernel-headers and kernel-devel
	rpm -qa|grep -e  kernel-devel  -e  kernel-headers
	
	# find kernel version
	uname -r

• virtualbox6.1启用嵌套VT-x/AMD-V的方式

  • 先关闭centos虚拟机

  • 然后终端执行vboxmanage modifyvm "<虚拟机名称>" --nested-hw-virt on