Linux

Basically, Linux is a kernel, not the OS.  The Linux kernel is monolithic. Monolithic kernels control the CPU, memory, Inter-Process Communication, device drivers, file system management, and system server calls.

Is Linux the kernel or OS?

 Linux is a kernel, not the OS:- The program in the system that allocates the machine’s resources to the other programs that you run is known as the kernel. The kernel is an essential part of an operating system, but useless by itself, it can only function in the context of a complete operating system.

Do you know what was the use of ls command in Linux?

ls is a Linux shell command that lists all the directory contents of files and directories. It provides valuable information about all the files, directories, and their attributes in a particular folder. If you type the ls command with no parameters or qualifiers, the command displays the files listed in your current working directory.
When you give the ls command, you can add one or more modifiers to get additional information. The additional modifiers that can be added up with the ls command will help you to get the list of data in a formatted and clear understanding way. Those are :
  • ls -l
  • ls -a
  • ls -F
  • ls -g
  • ls -i
  • ls -m
  • ls -n
  • ls -r
  • ls -R
  • ls -t
These additional modifiers can also be used in combined way as well. Like
  • ls -lr
  • ls -lrt
  • ls -lrth
  • ls -alrth
  • ls -am …etc

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