Red Hat Enterprise Linux Technical Overview

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promotion code promo-rh024 

https://www.redhat.com/rhtapps/promo-rh024

It is a basic and for beginners course with only 7 to 10 minutes pear videos,

although if you already have good knowledge is still good for a”refresh” knowledge, check my notes below for example.

I liked in particular the booting process explanation and the System Startup Processes which explains the differences from Redhat 6 and now the systemctl on Redhat 7.

You have to register yourself to have access to the course content. If you do, I hope you enjoy it.

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Content of this course

  • Why Do IT Professionals Need Experience with Linux?
  • Why Does the Open Source Development Model Matter?
  • What is a Linux Distribution?
  • What is the Shell and How is it Used to Control Programs?
  • What is the Linux Kernel and What is User Space?
  • Orientation to the Linux Graphic User Interface
  • Files in Linux
  • The File System Hierarchy
  • Editing Text Files in a Terminal
  • Users and Groups
  • File Permissions
  • How Do I Manage Software in Red Hat Enterprise Linux?
  • How Do I Configure Networking from the Command Line?
  • How Do I Control System Startup Processes?
  • How Do I Learn More About Linux?

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Notes from the course

systemctl get-default
systemctl set-default multi-user.target
systemctl isolate muti-user.tarde
systemctl list-dependencies multi-user.target
systemctl list-dependencies graphical.target

“By default the “man” shows info about commands, but
if you are looking about information about a file, you type man 5 “command” ”

# example:
man 1 passwd
man 5 passwd

man -k "key word"

man man
~$ echo {A..z} {0..9} > TEST-FILE
~$ 
~$ hexdump -n 512 -C TEST-FILE 
00000000  41 20 42 20 43 20 44 20  45 20 46 20 47 20 48 20  |A B C D E F G H |
00000010  49 20 4a 20 4b 20 4c 20  4d 20 4e 20 4f 20 50 20  |I J K L M N O P |
00000020  51 20 52 20 53 20 54 20  55 20 56 20 57 20 58 20  |Q R S T U V W X |
00000030  59 20 5a 20 5b 20 20 5d  20 5e 20 5f 20 60 20 61  |Y Z [  ] ^ _ ` a|
00000040  20 62 20 63 20 64 20 65  20 66 20 67 20 68 20 69  | b c d e f g h i|
00000050  20 6a 20 6b 20 6c 20 6d  20 6e 20 6f 20 70 20 71  | j k l m n o p q|
00000060  20 72 20 73 20 74 20 75  20 76 20 77 20 78 20 79  | r s t u v w x y|
00000070  20 7a 20 30 20 31 20 32  20 33 20 34 20 35 20 36  | z 0 1 2 3 4 5 6|
00000080  20 37 20 38 20 39 0a                              | 7 8 9.|
00000087
~$ 

or the command

ps aux

# now with more detail
ps ax -o user,pid,group,supgrp,command

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All the best and hope you enjoy it,

#feijaouk