Exactly what the name says: It displays and sets the date on a Linux system.
date
The time command is used to time a command and not display the actual time. To display the time and date, the date command must be used.
If you use Linux its hard to get one anywhere else... All kidding aside, the date command is used to print the current date and time (such as day of week, month, day of month, time, timezone, and year).
date -u +%A
With command date option -s
k is not a standard command in Linux.
There is no such command. Obviously, in order to enter a command into the prompt, Linux must already be on.
In a Linux terminal, the command to create a new directory is: mkdir .
There probably are several, but I use 'cal' as a quick means.
In Linux the chmod command is used to set file permissions.
Nothing. Helo is not a recognized command in linux.
Linux does not have a limit as to the number of characters you can enter in a command.