3.3. 操作系统安装及拍快照技巧

# todo 准备工作
# * 1. 设置firewalld禁用状态
#       systemctl stop firewalld
#       systemctl disable firewalld
#       systemctl is-enabled firewalld

# * 2. 设置SELinux禁用状态
#       vim /etc/sysconfig/selinux
#       修改内容:
#           SELINUX=disabled