RHCSA 2021 | Red Hat Certified System Administrator EX200 | Tech Arkit

Linux Tutorial | Complete Beginners Guide | Tech Arkit

Introduction to Linux.
Directory structure
RHEL 8 Installation
Remote Server OS Installation
Booting Process
Updating Linux packages
Accessing Linux Server GUI & CLI
Switching users in multiuser target
Standard Input, Output and Error
Basic Commands - cat, cd, ls, ..etc
Creating soft links and hard links
Text Editors nano & vim
Compressing and un-compressing files & folders
Getting Help from command Line User Interface
Grep command regular expressions
YUM Repository configuration
SSH Server & Client configuration
Configure Key-based authentication
NTP configuration
Copying files to remote server
Listing and Managing Linux processes
File permissions
Creating standard Linux partitions
Deleting standard Linux partitions
Creating PVs, VGs, and LVM
Extend Logical Volumes non-destructively
Reduce LVM size - lvreduce
Swap Memory Explained | How to Create swap partition & extend
Creating Users and Groups
Modify user properties | Password age
Deleting users and groups
Access control list - ACL
Special Linux file permissions Set-GID, Set-UID, Sticky Bit
Sudo access - sudoers policy
Linux Networking | Assign Static IP
Firewall Rules | firewalld | Firewall-cmd
SELinux to enforcing policies
Shell Scripts :
if statement
for loop
Positional parameters
Exit codes
Scheduling future tasks - crontab
Installing and updating packages using RPM & YUM
Find and retrieve container images from a remote registry
Inspect container images
Perform container management using commands such as podman and skopeo
Perform basic container management such as running, starting, stopping, and listing running containers
Run a service inside a container
Configure a container to start automatically as a systemd service
Attach persistent storage to a container  https://docs.oracle.com/en/learn/storage_podman_containers/index.html#using-volumes-with-containers
VNC Server Installation and configuration
NFS Server Installation and configuration
Autofs configuration
Samba Server Installation and Configuration

Linux Tutorial for Beginners | Tech Arkit


Video Timelines ______________________________________________________________ 00:10 Course Curriculum 13:05 Introduction to Linux. 25:13 Directory structure 43:04 RHEL 8 Installation Registration Link: https://www.redhat.com/wapps/ugc/regi... 56:46 Remote Server OS Installation 1:10:57 Booting Process 1:16:10 Subscription manager & Updating Linux packages 1:27:33 Accessing Linux Server GUI & CLI 1:41:57 Switching users in multiuser target 1:55:00 Standard Input, Output and Error 2:07:36 Basic Commands - cat, cd, ls, ..etc 2:46:10 Creating soft links and hard links 3:00:30 Text Editors nano & vim 3:20:00 Compressing and un-compressing files & folders 3:40:48 Getting Help from command Line User Interface 3:56:14 Grep command regular expressions 4:12:15 YUM Repository configuration 4:19:18 SSH Server & Client configuration 4:41:20 Configure Key-based authentication 4:45:00 NTP configuration 4:52:31 SCP | Copying files to remote server 5:02:54 Listing and Managing Linux processes (ps and top commands) 5:20:53 File and Directory permissions 5:33:24 Creating standard Linux partitions 5:46:47 Deleting standard Linux partitions 5:47:55 Creating PVs, VGs, and LVM 6:05:01 Extend Logical Volumes non-destructively 6:15:56 Reduce LVM size - lvreduce 6:21:52 Swap Memory Explained | How to Create swap partition & extend 6:34:14 Creating Users and Groups | User Administration 7:08:59 Modify user properties | Password age 7:20:10 Deleting users and groups 7:21:34 Access control list - ACL 7:36:00 Special Linux file permissions Set-GID, Set-UID, Sticky Bit 7:43:22 Sudo access - sudoers policy 8:04:34 Linux Networking | Assign Static IP 8:24:31 Firewall Rules | Firewalld | firewall-cmd 8:39:59 SELinux - Security Enhanced Linux 9:04:11 Shell Scripts : 9:13:51 if statement 9:19:35 for loop 9:20:00 Positional parameters 9:23:00 Exit codes 9:26:26 Scheduling future tasks - crontab 9:42:05 Installing and updating packages using RPM & YUM -------- Linux Containers Podman, Buildah, Skopeo and Runc -------- 9:58:09 Find and retrieve container images from a remote registry 10:11:04 Inspect container images 10:16:32 Buildah Building the Images 10:30:34 Dockerfile | Build Buildah Images using Dockerfile 10:34:40 Attach persistent storage to a container

Building Container Image using buildah


  • The Buildah package provides a command line tool that can be used to
  • Create a working container, either from scratch or using an image as a starting point
  • Create an image, either from a working container or via the instructions in a Dockerfile
  • Images can be built in either the OCI image format or the traditional upstream Docker image format
  • Mount a working container's root file system for manipulation
  • Unmount a working container's root file system
  • Use the updated contents of a container's root file system as a file system layer to create a new image
  • Delete a working container or an image
  • Rename a local container

buildah from centos
buildah images
buildah containers
curl -sSL https://ftp.gnu.org/gnu/hello/hello-2.10.tar.gz -o hello-2.10.tar.gz
buildah copy centos-working-container hello-2.10.tar.gz /tmp/ 
buildah run centos-working-container yum install -y tar gcc make 
buildah run centos-working-container yum clean all
buildah run centos-working-container tar xvzf /tmp/hello-2.10.tar.gz -C /opt
buildah config --workingdir /opt/hello-2.10 centos-working-container
buildah run centos-working-container ./configure
buildah run centos-working-container make
buildah run centos-working-container make install
buildah run centos-working-container hello –v
buildah config --entrypoint /usr/local/bin/hello centos-working-container
buildah commit --format docker centos-working-container firstbuildah:latest
buildah images
podman save -o mybuild1.tar localhost/hello2latest
podman rmi 638d3f915ea2 –f
podman load -i mybuild1.tar



Podman RHEL 8 | Building, Running and Managing containers Red Hat


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Deploy LAMP Stack Using Ansible Playbook https://youtu.be/cyylA0Yfn2o
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SSH vulnerabilities MAC algorithms and CBC ciphers Tech Arkit


Name: SSH Weak MAC Algorithms Enabled
Description: The remote SSH server is configured to allow either MD5 or 96-bit MAC Algorithms both of which are considered weak.
Solution: Contact the vendor or consult product documentation to disable MD5 and 96-bit MAC algorithms

Name: SSH Server CBC Mode Ciphers Enabled
Description: The SSH server is configured to support Cipher Block Chaining (CBC) encryption.  This may allow an attacker to recover the plaintext message from the ciphertext
Solution: Contact the vendor or consult product documentation to disable CBC mode cipher encryption and enable CTR or GCM cipher mode encryption.

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Ansible Ad-Hoc Commands with examples https://youtu.be/Kr-62ON416c
Writing your first Ansible playbook guide https://youtu.be/2nRfP69sGsk
How to variables in Ansible playbook https://youtu.be/nOOe-_rNhP8
Conditionals and Loops of Ansible playbooks https://youtu.be/JYPn5l3ChX0
Ansible playbook challenge https://youtu.be/SO-3nqAf3sY
Deploy LAMP Stack Using Ansible Playbook https://youtu.be/cyylA0Yfn2o
Tags Ansible https://youtu.be/LPdRHd4ID7c
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Bugzilla Installation Centos 8


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Ansible Inventory configuration https://youtu.be/G7_orKIWAeA
Ansible Ad-Hoc Commands with examples https://youtu.be/Kr-62ON416c
Writing your first Ansible playbook guide https://youtu.be/2nRfP69sGsk
How to variables in Ansible playbook https://youtu.be/nOOe-_rNhP8
Conditionals and Loops of Ansible playbooks https://youtu.be/JYPn5l3ChX0
Ansible playbook challenge https://youtu.be/SO-3nqAf3sY
Deploy LAMP Stack Using Ansible Playbook https://youtu.be/cyylA0Yfn2o
Tags Ansible https://youtu.be/LPdRHd4ID7c
Ansible Roles https://youtu.be/MGklkuq0-Gs
Ansible Vault https://youtu.be/RbDlfDJhQlI
Ansible Galaxy: https://youtu.be/34ycoo2T1HI