SIMULATION Shutdown the /root/cdrom.iso under /opt/data and set as boot automatically mount.

SIMULATION Configure the ftp to allow anonymously download the directory /var/ftp/pub, and reject the domain t3gg.com to access.

SIMULATION Configure ssh to allow user harry to access, reject the domain t3gg.com (172.25.0.0/16) to access.

SIMULATION Please open the ip_forward and take effect permanently.

SIMULATION Please set the selinux status as enforcing.

SIMULATION Prevent Mary from performing user configuration tasks in your system.

SIMULATION Given the kernel of a permanent kernel parameters: sysctl=1. It can be shown on cmdline after restarting the system. Kernel of /boot/grub/grub.conf should be a34dded finally, as:

SIMULATION Create a Shell script /root/program: The shell script will come back to “user” parameter when you are entering “kernel” parameter. The shell script will come back to “kernel” when you are entering “user” parameter. It will output the standard…

SIMULATION Configure a mail alias to your MTA, for example, send emails to harry but mary actually is receiving emails.