The 'top' command is a Linux utility that allows you to monitor and manage system CPU performance. It provides a real-time view of system processes, CPU usage, memory usage, and more. You can use it to identify resource-intensive processes and manage system performance.

virt-manager is a graphical tool for managing virtual machines in Linux. It provides a user-friendly interface to create, configure, and manage virtual machines using various virtualization technologies, including KVM and QEMU.

A kernel that can have modules loaded and unloaded at runtime is referred to as a "modular" kernel. In a modular kernel, certain functionality can be added or removed via loadable kernel modules, making it more flexible and efficient.

The 'netstat' command provides information about network connections, routing tables, and network interface statistics. It's a powerful utility for diagnosing network-related issues and displaying network statistics and connections.

In Bash scripting, the for command is used to loop over a range of values. It allows you to execute a set of commands for each item in the specified range or list.

To determine the number of positional parameters passed to a shell script, you would use the built-in variable $#. It represents the count of arguments supplied to the script.

The SSH configuration parameter that specifies the maximum number of authentication attempts allowed per connection is MaxAuthTries. It can be set in the SSH server configuration file (sshd_config) to enhance security by limiting the number of failed login attempts.

Docker primarily deals with containerization, which is a lightweight form of virtualization. Containers share the host OS kernel, making them efficient and suitable for packaging and running applications.

The primary purpose of the chmod command in Linux is to change file permissions. It allows you to modify the access permissions of files and directories. You can use it to control who can read, write, and execute a particular file or directory.

The primary keyword to start a loop that will iterate a fixed number of times in shell scripting is for. The for loop allows you to specify the number of iterations and is commonly used for such purposes.