Basically, it lets you know what your computer is busy with. Comparison can be made to the 'process' portion of the windows task manager, but with more functionality.
With the top command.
With the top command.
top
Type top in a terminal to display Linux processes, which includes PID.
In Linux the chmod command is used to set file permissions.
Just type "top" into the command line. It requires no arguments. To exit, press 'q'.
The df command displays drive capacities. The free command will show memory usage. The top command will show the system load of various processes.
vi
k is not a standard command in Linux.
date
There is no such command. Obviously, in order to enter a command into the prompt, Linux must already be on.
The 'man' or the 'info' command have documentation about utilities and commands in the system.