Tech Arkit

Ansible Automation Playlist:

https://www.youtube.com/playlist?list=PL8cE5Nxf6M6YUaKyuon-AWRDNr31ANuo2

RHCSA - Red Hat Certified System Administrator PlayList:

https://www.youtube.com/playlist?list=PL8cE5Nxf6M6ZHEt4-CgdvbMyJ3hRAoth3

Scripts: https://github.com/techarkit/shell-scripting-tutorial

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https://github.com/techarkit/Linux-For-Beginners/blob/master/Linux_Video_Tutorial.md

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Ansible Course

Automation with Ansible Course https://youtu.be/-b1ByalW4X8

Ansible Lab Setup https://youtu.be/p8xkv1m-boE

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

Introduction to Linux | Linux for Beginners 2021 | RHCSA 2021

Linux For Beginners 2021 | Course Curriculum | RHCSA 2021 | 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 the 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 uncompressing 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 a 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

Files & directory permissions

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 service inside a container

Configure a container to start automatically as a systemd service

Attach persistent storage to a container

VNC Server Installation and configuration

NFS Server Installation and configuration

Autofs configuration

Samba Server Installation and Configuration

DevOps Interview Questions and Answers | Tech Arkit

What is devops?

What is ci/cd?

What is difference in DevOps and CICD?

What are the git commands you use?

Difference in git fetch and git pull?

What is default port of Jenkins?

How to change Jenkins port no?

How to connect master slave?

How to checkout git code in Jenkins?

How to take backup of ur jenkins?

Do you have any script to launch slave nodes?

How do you resolve build failure?

Difference in soft link and hard link?

https://www.youtube.com/watch?v=w6pZTYuDWTg

How to find a particular word from a file?

What is stop command?

What is Terraform provisioner?

What is Terraform module?

Is it possible to lock Terraform module?

What is AWS vpc?

How do you select availability zones using Terraform?

What is difference in S3 and other AWS storages?

What is ansible playbook?

Syntax of ansible playbook

How u run ansible playbook?

Have you worked with any alerting monitoring tools?

Linux Interview Questions and Answers

How to Find Server Serial number in Linux | Service Tag | Hardware Infor...

dmidecode -s baseboard-manufacturer

dmidecode -s baseboard-product-name

dmidecode -s baseboard-version

dmidecode -s baseboard-serial-number

dmidecode -s baseboard-asset-tag

dmidecode -s chassis-manufacturer

dmidecode -s chassis-type

dmidecode -s chassis-version

dmidecode -s chassis-serial-number

dmidecode -s chassis-asset-tag

dmidecode -s processor-family

dmidecode -s processor-manufacturer

dmidecode -s processor-version

dmidecode -s processor-frequency

Failed to Start Switch Root Linux Troubleshooting | Emergency Mode | Tec...

Serverl.localdomain systemdtll: Reached target Switch Root,

Serverl.localdomain systemdtll: Starting Switch Root...

Serverl.localdomain systemctlt6551: Failed to switch root: Specified switch root path '/sysroot' does not seem to be an 0S tree, os-release file is missing

Serverl.localdomain systemdtll: initrd-switch-root.service: Main process exited, code =exited, status=l/FAILURE

Serverl.localdomain systemdtll: initrd-switch-root.service: Failed with result 'exit- code '.

Serverl.localdomain systemdtll: Failed to start Switch Root.

Serverl.localdomain systemdtll: Startup finished in 1.388s (kernel) + 0 (initrd) + 1. 825s (userspace) = 3.214s.

Serverl.localdomain systemdtll: initrd-switch-root.service: Triggering OnFailure= dep endencies.

Serverl.localdomain systemdtll: Starting Setup Uirtual Console... t 3.2760981 Serverl.localdomain systemdtll: Started Setup Uirtual Console,

Serverl.localdomain systemdtll: Started Emergency Shell,

Serverl.localdomain systemdtll: Reached target Emergency Mode,

Serverl.localdomain systemdtll: Received SIGRTT1IN+21 from PID 421 (plymouthd). t 134.5871651 Serverl.localdomain kernel: random: crng init done

Serverl.localdomain kernel: random: 7 urandom warning(s) missed due to ratelimiting

:/#

check_mysql_health Monitoring MySQL Instance Using Nagios | Tech Arkit

connection-time: Time to connect to the server
uptime : Time the server is running
threads-connected : Number of currently open connections
threadcache-hitrate : Hit rate of the thread-cache
threads-created: Number of threads created per sec
threads-running: Number of currently running threads
threads-cached : Number of currently cached threads
connects-aborted: Number of aborted connections per sec
clients-aborted: Number of aborted connections : because the client died per sec
slave-lag : Seconds behind master
slave-io-running: Slave io running: Yes
slave-sql-running : Slave sql running: Yes
qcache-hitrate : Query cache hitrate
qcache-lowmem-prunes : Query cache entries pruned because of low memory
keycache-hitrate: MyISAM key cache hitrate
bufferpool-hitrate : InnoDB buffer pool hitrate
bufferpool-wait-free : InnoDB buffer pool waits for clean page available
log-waits : InnoDB log waits because of a too small log buffer
tablecache-hitrate : Table cache hitrate
table-lock-contention: Table lock contention
index-usage: Usage of indices
tmp-disk-tables: Percent of temp tables created on disk
table-fragmentation : Show tables which should be optimized
open-files : Percent of opened files
slow-queries : Slow queries
long-running-procs : long running processes
cluster-ndbd-running : ndnd nodes are up and running
sql : any sql command returning a single number

Best screen recording Software for (RHEL 7) Red Hat Enterprise Linux 7

Ubuntu 20.04 (Focal Fossa) New Features and Installation | Ubuntu Instal...

Ubuntu 20.04 LTS Focal Fossa
5 Years Support
Kernel Version 5.4
GNOME 3.36 version
Glibc 2.31
OpenJDK 11
Python 3.8.2
Php4 7.4
Perl 5.30
Golang 1.13
Brand New Lock screen
Colour folder icons has changed to heavy Grey
New dark mode setting
New wallpaper
Change resolution settings so easy
No amazon app pre-installed
Snap-based Ubuntu Software app
Linux Kernel 5.4
Faster boot speeds
OEM logo displayed during boot
Improved appearance
Dark theme
Fractional scaling setting
Ships with GNOME 3.36
Redesigned login screen
New lock screen
Improved GNOME Shell performance
Refined ZFS install support
Game mode added to the archives

Monitoring MySQL / MariaDB Databases Nagios | MySQL Instance status | Te...

This monitoring script connects to database, does 'SELECT VERSION' and then

'SHOW STATUS' or 'SHOW GLOBAL STATUS' (for version 5.0.2 or newer of mysql)

or other query you specify with '-q'. It then allows to select variables

from 'SHOW STATUS' and check them against critical and warning thresholds(s)

Status data can also be used for performance output.

Scripts: https://github.com/techarkit/shell-scripting-tutorial

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https://github.com/techarkit/Linux-For-Beginners/blob/master/Linux_Video_Tutorial.md

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