The shell.
There is no such command. Obviously, in order to enter a command into the prompt, Linux must already be on.
With the whoami command.
Command prompt is a simple term meaning the place where you can enter system commands. It has different names on different systems, Windows -cmd(Command Prompt), Linux Mac - Terminal
mount
At a terminal prompt: sudo apt-get install <application-name>
type this at you Linux command prompt cat /proc/filesystems
At the command prompt, type 'man [command]' (removing the brackets and substituting the command for which you need information).
nslookup if it was a linux machine nslookup works too, but dig -x on a linux machine will get more info for you
If you're talking about Linux, no it does not.
"powershell" on windows and "bash" on linux. I'm pretty sure mac uses bash too
Use "prompt $p$g" command.
k is not a standard command in Linux.