You are a Linux administrator tasked with assessing the security posture of your organization’s network. You need to identify open ports, detect host operating systems, and document firewall settings to ensure there are no misconfigurations that could be exploited. Which tool would be the MOST appropriate use for this task?  

Which of the following commands displays the information you need to determine the permission settings for a file?

What is the #! /bin/bash string at the front of a script called?

A system administrator reviews information about software on their devices. Which of the following commands would easily display an inventory?

One of your users, Karen Scott, has recently changed names and is now Karen Jones. You need to change Karen’s username from kscott to kjones. Which of the following commands with accomplish this task without changing other values?

Which of the following would not be automated in a Linux environment?

You are a Linux administrator tasked with writing a complex Bash script to automate a system backup process.  You want to use a script editor that supports syntax highlighting, auto-completion, and bracket matching to reduce errors and improve efficiency.  Which of the following script editors would be the best choice for this task?

An administrator is configuring systems and wants to connect remotely to a server for administration purposes. Which service should the administrator use?

When creating a Bash script, it is important to document the purpose of the script.  Which of the following is a valid comment?

What is the default subnet mask for the IP address 203.111.3.3?