A technician reviews the following output:

Which of the following commands should the technical execute to ensure the system has the appropriate paging? (Select TWO.)

A Linux administrator has installed a web application firewall in front of a web server running on HTTP port 8080 and successfully started the HTTP server. However, after opening the application URL in an Internet browser, the administrator discovered that the application does not work. The administrator performed the following diagnostic steps:
Output of sysctl -a command:

Output of iptables -L command:

Output of netstat -nltop | grep "8080":

Which of the following is the NEXT step the administrator should perform to permanently fix the issue at the kernel level?

A systems engineer scheduled an at job that will reboot a critical server. A developer states the processes will not complete for another three hours.
Which of the following will help the systems engineer to remove the job?

While trying to access a website hosted on the server, the systems administrator receives the following error message:

The administrator then performs some diagnostics:

Which of the following commands should the administrator use to fix the issue?

A server is almost out of free memory and is becoming unresponsive. Which of the following sets of commands will BEST mitigate the issue?