Questions:

1. What is the purpose of the "chown" command in Linux?

Change the user's password
Change file ownership
Change the system hostname
Change the shell prompt

2. Which command is used to display free and used memory in Linux?

meminfo
free
memory
top

3. In Linux, what is the purpose of the "sudo" command?

Switch user
Execute a command with superuser privileges
Create a new user
Start a secure session

4. Explain the concept of "PAM" (Pluggable Authentication Modules) in Linux, and how it enhances security.

PAM is a firewall framework that manages packet filtering and network traffic.
PAM is a system that authenticates users based on their IP addresses.
PAM is a flexible authentication mechanism that enables the use of multiple authentication methods, strengthening security and allowing centralized authentication management.
PAM is a virtualization technology used for running multiple Linux instances on a single physical machine.

5. What is the purpose of the "kill" command in Linux?

Terminate a user session
Remove a process from memory
Send a signal to a process
Uninstall software packages