Working with Linux CLI #1

Working with Linux Command Line Interface #1
https://msslinux.blogspot.com/2020/07/working-with-linux-cli-1.html

Very Introductory orientation of Linux Command Line based on Red Hat Enterprise  Linux 8 (RHEL8). Throughout the series  of tutorial learner will get familiar with Linux CLI from zero to hero. No prior knowledge is required.


Linux Command Line Interface Orientation:
===============================
[student@hostX Desktop] $
[root@hostX    Desktop] #
  1         2               3         4

  1: user id
  2: host name
3: user's current location
4: user types (root: #, regular user: $)

Linux User's Types:
===============
 => root user: Administrator (#)
 => system user: service (mail/ftp/games/daemon)-cannot login
 => regular user: student, guest, sam,bob ($)


Working with Linux Shells & Terminal:
=============================
 User -> Keyboard -> Terminal/Application -> Shell -> Kernel -> Hardware
           Screen <- Terminal <- Shell <- Kernel <- Hardware

Which Shells are in use and which shells are available in current system:

[student@hostX Desktop] $ echo $SHELL
[student@hostX Desktop] $ chsh -l
 /bin/sh
 /bin/bash
 /usr/bin/sh
 /usr/bin/bash


Continued in next post Working with Linux CLI #2