Nehra Classes

📢 Notice: Registration Open for Linux RHCSA (EX200) English Training on RHEL 10!

We are excited to announce the upcoming Linux RHCSA (EX200) English Training on RHEL 10, starting from 01 March 2025. This comprehensive training is designed to help you master Linux system administration and prepare effectively not only for the RHCSA certification exam but also to acquire the advanced Linux skills.

Training Highlights:
•  Live Sessions: Interactive training via Google Meet.
•  Access: Recordings and PDFs available for the next 2 years.
•  Expert Guidance & Support: Learn from industry experts with real-world examples.
•  Trainer: Vikas Nehra
•  Duration: 130+ hours (About 7 Months till Completion)
•  Timings: From 01 March 2025 on Tuesday, Thursday & Saturday at 09:30 PM IST.
•  Syllabus: http://www.nehraclasses.in/wp-content/uploads/2024/12/RHCSA-10-Syllabus-Nehra-Classes.pdf

Registration Fee:
•  Early Bird Offer: Registration fee is just ₹6999 or 99 USD for the first 25 seats.
•  Regular Fee: Increases to ₹9999 or 129 USD after the first 25 seats are filled.
(To be paid at the time of registration in full and is non-refundable under any circumstances).

How to Register?

Hurry up! Secure your seat now to lock in the discounted price and get started on your RHCSA v10 journey.

Registration Form:
https://forms.gle/kCSgFD7oXau68KUy9

Nehra Classes – Igniting The Minds

📢 Notice for Nehra Classes Subscribers
We are pleased to inform you that Docker live sessions will resume from the upcoming Wednesday on YouTube!
The sessions were paused last week as Vikas Sir was occupied with some urgent work. We appreciate your patience and understanding.
Stay tuned for more amazing content and don’t forget to join us on Wednesday at the scheduled time!
Thank you,
Nehra Classes

📢 Notice: Registration Open for Linux RHCSA (EX200) English Training on RHEL 10!

We are excited to announce the upcoming Linux RHCSA (EX200) English Training on RHEL 10, starting from 01 March 2025. This comprehensive training is designed to help you master Linux system administration and prepare effectively not only for the RHCSA certification exam but also to acquire the advanced Linux skills.

Training Highlights:
•  Live Sessions: Interactive training via Google Meet.
•  Access: Recordings and PDFs available for the next 2 years.
•  Expert Guidance & Support: Learn from industry experts with real-world examples.
•  Trainer: Vikas Nehra
•  Duration: 130+ hours (About 7 Months till Completion)
•  Timings: From 01 March 2025 on Tuesday, Thursday & Saturday at 09:30 PM IST.
•  Syllabus: http://www.nehraclasses.in/wp-content/uploads/2024/12/RHCSA-10-Syllabus-Nehra-Classes.pdf

Registration Fee:
•  Early Bird Offer: Registration fee is just ₹6999 or 99 USD for the first 25 seats.
•  Regular Fee: Increases to ₹9999 or 129 USD after the first 25 seats are filled.
(To be paid at the time of registration in full and is non-refundable under any circumstances).

How to Register?

Hurry up! Secure your seat now to lock in the discounted price and get started on your RHCSA v10 journey.

Registration Form:
https://forms.gle/kCSgFD7oXau68KUy9

Nehra Classes – Igniting The Minds

https://youtube.com/shorts/BLfhwNEzuSA?si=USy5aqzecl5I6LYA

"Let this achievement be a reminder that hard work and dedication make anything possible."

This is what happens when you go for zero to hero devops courses.

Funny incident at 45:13
https://www.youtube.com/live/RZywQyDwnCc?si=goIujOlTUVGtXqAA

Nehra Classes pinned «📢 Big Announcement During Today's Live Docker Session! Hello Nehra Classes Subscribers, 🚀 We’re excited to invite you to Docker Session #22 happening today at 09:30 PM IST on YouTube Live. 🎉 Don't miss it! Along with the incredible content on Docker…»

📢 Big Announcement During Today's Live Docker Session!

Hello Nehra Classes Subscribers,

🚀 We’re excited to invite you to Docker Session #22 happening today at 09:30 PM IST on YouTube Live.

🎉 Don't miss it! Along with the incredible content on Docker, we have a big announcement that you’ll surely want to hear!

📌 Session Topic:
- Change Container IP Address of a running container

💡 Make sure to join us live, participate and be the first to hear the exciting news!

🕒 When?
Today, 09:30 PM IST

📺 Where?
https://youtube.com/live/E_9idMEL8Q4?feature=share

Set your reminders and spread the word! 🚀

📢 Notice: Registration Open for Linux RHCSA (EX200) English Training on RHEL 10!

We are excited to announce the upcoming Linux RHCSA (EX200) English Training on RHEL 10, starting from 01 March 2025. This comprehensive training is designed to help you master Linux system administration and prepare effectively not only for the RHCSA certification exam but also to acquire the advanced Linux skills.

Training Highlights:
•  Live Sessions: Interactive training via Google Meet.
•  Access: Recordings and PDFs available for the next 2 years.
•  Expert Guidance & Support: Learn from industry experts with real-world examples.
•  Trainer: Vikas Nehra
•  Duration: 130+ hours (About 7 Months till Completion)
•  Timings: From 01 March 2025 on Tuesday, Thursday & Saturday at 09:30 PM IST.
•  Syllabus: http://www.nehraclasses.in/wp-content/uploads/2024/12/RHCSA-10-Syllabus-Nehra-Classes.pdf

Registration Fee:
•  Early Bird Offer: Registration fee is just ₹6999 or 99 USD for the first 25 seats.
•  Regular Fee: Increases to ₹9999 or 129 USD after the first 25 seats are filled.
(To be paid at the time of registration in full and is non-refundable under any circumstances).

How to Register?

Hurry up! Secure your seat now to lock in the discounted price and get started on your RHCSA v10 journey.

Registration Form:
https://forms.gle/kCSgFD7oXau68KUy9

Nehra Classes – Igniting The Minds

Hi YouTube Members,
Please visit below URLs to raise the request for the study material (click the URL which matches your membership level).

Study Material Request👇

Trainee Level (RHCSA Hindi & AWS Hindi Material):
https://www.youtube.com/post/UgkxhdZMomYAkV6Kk9T2uiyPMbuxQfLQ9oA0

Associate Level (Docker Hindi & Trainee Level Material):
https://www.youtube.com/post/UgkxqjF3p--a7hTK3r-qzBpdpNh5NJ4bgTuX

Engineer Level (Server Hindi Training & Associate Level Material):
https://www.youtube.com/post/UgkxRDJb0DRjX_FKzYqe7j0JCF3Bonh0Jah2

Specialist Level (RHCSA English, RHCE Hindi, RHCSSMA Hindi & Engineer Level Material):
https://www.youtube.com/post/UgkxYmPGUyVn_RtmIz90Q3SbrR2OTLPQqcLP

Thank You
Nehra Classes

📢 Announcement: Exciting Changes to Membership Levels and Benefits at Nehra Classes! 🎉

Dear Subscribers,

We are thrilled to announce the introduction of new membership levels to make your learning journey more structured and rewarding! 🎓

Here’s the updated hierarchy of membership levels:

1️⃣ Trainee: For beginners starting their IT journey.

Access to introductory content and live sessions.


2️⃣ Associate: For learners building foundational skills.

Includes advanced beginner-level sessions and study material.


3️⃣ Engineer: For individuals ready to deep dive into core IT topics.

Unlocks intermediate-level training, hands-on exercises, and practical assignments.


4️⃣ Specialist: For experts focusing on niche IT domains.

Access to advanced sessions, mock interviews, and personalized guidance.


5️⃣ Architect: For aspiring industry leaders.

Includes all facilities from lower levels plus exclusive content, one-on-one mentoring, and career counseling sessions.


We are confident that these changes will better align with your career goals and enhance your learning experience. Stay tuned for more updates and details about the facilities offered at each level!

Let us know your thoughts in the comments or reach out to us with your queries.

Happy learning! 🚀

- Team Nehra Classes

https://www.youtube.com/live/o1k1bNMDcqM?si=AGXdGl-LtvNtFbzc

📢 Big Announcement Alert!

Dear Nehra Classes Subscribers,

Mark your calendars! A BIG ANNOUNCEMENT is coming your way on 20th February 2025. Stay tuned to our YouTube channel for an exciting update that could take your learning journey to the next level.

🗓️ Date: 20th February 2025
⏰ Time: 09:30 PM IST
📍 Where: Nehra Classes YouTube Channel

Don’t miss this—make sure your notifications are ON!

Stay curious, stay inspired,
Team Nehra Classes

"अपने सपनों का पीछा करो, रास्ते खुद बनते चले जाएंगे।"
"Chase your dreams; the path will create itself."

🎉 New Monitors in Our YouTube Setup! 🎥

We’ve upgraded our setup to enhance your learning experience! With these new monitors, we're ready to deliver even clearer, more engaging sessions.

💻 “Quality is not an act, it’s a habit.” – Aristotle

Stay tuned for more amazing content! 🙌

📢 Notice for Nehra Classes Subscribers

Dear Subscribers,

Please note that there will be no live session this week as Vikas Sir is occupied with some urgent work.

The sessions will resume from the upcoming Monday as per the regular schedule. We appreciate your understanding and patience.

Stay tuned for updates, and thank you for being a valued part of Nehra Classes!

Warm regards,
Nehra Classes Team

📢 Notice: Registration Open for Linux RHCSA (EX200) English Training on RHEL 10!

We are excited to announce the upcoming Linux RHCSA (EX200) English Training on RHEL 10, starting from 01 March 2025. This comprehensive training is designed to help you master Linux system administration and prepare effectively not only for the RHCSA certification exam but also to acquire the advanced Linux skills.

Training Highlights:
• Live Sessions: Interactive training via Google Meet.
• Access: Recordings and PDFs available for the next 2 years.
• Expert Guidance & Support: Learn from industry experts with real-world examples.
• Trainer: Vikas Nehra
• Duration: 130+ hours (About 7 Months till Completion)
• Timings: From 01 March 2025 on Tuesday, Thursday & Saturday at 09:30 PM IST.
• Syllabus: http://www.nehraclasses.in/wp-content/uploads/2024/12/RHCSA-10-Syllabus-Nehra-Classes.pdf

Registration Fee:
• Early Bird Offer: Registration fee is just ₹6999 or 99 USD for the first 25 seats.
• Regular Fee: Increases to ₹9999 or 129 USD after the first 25 seats are filled.
(To be paid at the time of registration in full and is non-refundable under any circumstances).

How to Register?

Hurry up! Secure your seat now to lock in the discounted price and get started on your RHCSA v10 journey.

Registration Form:
https://forms.gle/kCSgFD7oXau68KUy9

Nehra Classes – Igniting The Minds

Today I found this picture from Almirah, #SchoolDays #Saraswati_Shishu_Mandir #Fifth_Standard #1995

Locate me if you can.

Happy New Year 2025!

May this year bring you endless joy, success, and opportunities to shine. Let's step into 2025 with positivity, hope and determination to achieve new heights. Cheers to a year filled with happiness and memorable moments!

Best wishes,
Nehra Classes

https://youtube.com/live/QrQZSJGU31A?feature=share

📢 Notice: Registration Open for Linux RHCSA (EX200) English Training on RHEL 10!

We are excited to announce the upcoming Linux RHCSA (EX200) English Training on RHEL 10, starting from 01 March 2025. This comprehensive training is designed to help you master Linux system administration and prepare effectively not only for the RHCSA certification exam but also to acquire the advanced Linux skills.

Training Highlights:
•  Live Sessions: Interactive training via Google Meet.
•  Access: Recordings and PDFs available for the next 2 years.
•  Expert Guidance & Support: Learn from industry experts with real-world examples.
•  Trainer: Vikas Nehra
•  Duration: 130+ hours (About 7 Months till Completion)
•  Timings: From 01 March 2025 on Tuesday, Thursday & Saturday at 09:30 PM IST.
•  Syllabus: http://www.nehraclasses.in/wp-content/uploads/2024/12/RHCSA-10-Syllabus-Nehra-Classes.pdf

Registration Fee:
•  Early Bird Offer: Registration fee is just ₹6999 or 99 USD for the first 25 seats.
•  Regular Fee: Increases to ₹9999 or 129 USD after the first 25 seats are filled.
(To be paid at the time of registration in full and is non-refundable under any circumstances).

How to Register?

Hurry up! Secure your seat now to lock in the discounted price and get started on your RHCSA v10 journey.

Registration Form:
https://forms.gle/kCSgFD7oXau68KUy9

Nehra Classes – Igniting The Minds

https://classplusapp.com/year-end-review2024/?orgId=661627

https://youtube.com/live/W4oL_SLL6NE?feature=share

📢 Important Announcement for Nehra Classes Subscribers

Dear Subscribers,

We regret to inform you that today's Docker session has been postponed due to unforeseen circumstances.

The session will now be held tomorrow at the same time.

We sincerely apologize for any inconvenience caused and look forward to seeing you all tomorrow for the session.

Thank you for your understanding and support!

Stay connected,
Nehra Classes

🎉 Thank You, Nehra Classes Family! 🎉

We are thrilled to share that our Nehra Classes YouTube channel has reached 51,000 subscribers! 🙌

This incredible milestone wouldn’t have been possible without your unwavering support, trust, and enthusiasm for learning. Every like, comment, share, and subscription motivates us to continue providing quality content for your growth. 🚀

A huge thank you to all our subscribers for being a part of this amazing journey. Together, we’ll keep learning, growing, and achieving new heights! 💻✨

Let’s aim for the next big milestone. Share the channel with your friends and peers and spread the knowledge!

#51000Subscribers #ThankYou #NehraClasses

https://youtube.com/live/pOyb_QGo3Oc?feature=share

https://youtube.com/live/1FW_My8_vbc?feature=share

📢 Important Announcement for Nehra Classes Subscribers 📢
Dear Students,
We hope you are enjoying the Docker training sessions and finding them helpful in your learning journey!
This is to inform you that Docker Session - 13 (Overlay2), originally scheduled for today, has been rescheduled to Friday.
We apologize for any inconvenience this may cause and appreciate your understanding. Please mark your calendars accordingly, and don’t miss out on this insightful session!
Stay tuned for more updates.
Happy Learning!
Nehra Classes Team

https://youtu.be/S4htB4mhlE8

Container ports are not typically required to be added explicitly to the host machine's firewall because of how container networking is designed. Here's why:

1. Port Mapping and Isolation

Containers are isolated environments, and their internal ports are mapped to the host's network through the container runtime (like Docker).

The container runtime acts as a proxy between the container and the host. It listens on the specified ports on the host and forwards traffic to the container, bypassing the host firewall unless explicitly configured.


2. Bridge Networking

By default, containers use bridge networking. This creates a virtual network on the host where containers communicate through the bridge.

Traffic between the host and the container is managed by this network, and it doesn’t directly interact with the host's main firewall rules.


3. iptables Configuration by Container Runtime

Tools like Docker automatically configure iptables rules on the host to handle container traffic.

These rules allow traffic to the mapped ports of the container, so you don’t need to manually open those ports in the host’s firewall.


4. Host Firewall Context

Firewalls like firewalld or ufw on the host typically control access to services running directly on the host, not inside containers.

Since the container runtime manages the network traffic, the host firewall does not need to explicitly allow container ports unless you are using custom networking setups.


When You Might Need to Modify the Host Firewall

In some cases, you might need to open ports in the host firewall:

Custom Network Configurations: If you’re using a custom bridge or host network mode, you might need to manually allow ports.

Host Network Mode: When containers are running in the host network mode, their ports are directly exposed, and the host firewall rules apply.

External Access: If your firewall has a default deny policy, you may need to explicitly allow traffic to the container ports.


Summary

The container runtime automates the network configuration for containers and integrates with the host's networking stack, including firewall rules, ensuring that container ports are accessible as configured without manual intervention.

To access Docker on a remote server from your local client, follow these steps:


---

1. Enable Docker Remote API on the Server

a) Edit the Docker Daemon Configuration

On the server, open the Docker daemon configuration file:

sudo nano /etc/docker/daemon.json

Add or update the following to enable the Remote API:

{
"hosts": ["unix:///var/run/docker.sock", "tcp://0.0.0.0:2375"]
}

unix:///var/run/docker.sock allows local connections.

tcp://0.0.0.0:2375 binds Docker to all network interfaces.



b) Restart the Docker Service

sudo systemctl restart docker

c) Allow the Port in the Firewall

If using ufw:

sudo ufw allow 2375/tcp

If using firewalld:

sudo firewall-cmd --permanent --add-port=2375/tcp
sudo firewall-cmd --reload


> ⚠️ Warning: Port 2375 is unencrypted. For secure access, use TLS (explained below).




---

2. Access Docker Remotely from the Client

a) Set the Docker Host

On your local machine, set the DOCKER_HOST environment variable to the remote server’s IP and port:

export DOCKER_HOST=tcp://<remote-server-ip>:2375

Replace <remote-server-ip> with the server's IP address.


b) Run Docker Commands

Test the connection with:

docker info

If successful, this will show information about the remote Docker server.


c) Optional: Make the Setting Permanent

Add the export command to your shell configuration file (e.g., .bashrc or .zshrc).



---

3. Secure the Remote Access with TLS (Recommended)

a) Generate TLS Certificates on the Server

Create a directory for certificates:

mkdir -p /etc/docker/certs
cd /etc/docker/certs

Generate a CA key and certificate:

openssl genrsa -out ca-key.pem 2048
openssl req -new -x509 -key ca-key.pem -days 365 -out ca.pem

Generate a server key and certificate signing request (CSR):

openssl genrsa -out server-key.pem 2048
openssl req -subj "/CN=<server-ip>" -new -key server-key.pem -out server.csr
openssl x509 -req -days 365 -in server.csr -CA ca.pem -CAkey ca-key.pem -CAcreateserial -out server-cert.pem

Generate client certificates (optional, for client authentication):

openssl genrsa -out client-key.pem 2048
openssl req -subj "/CN=client" -new -key client-key.pem -out client.csr
openssl x509 -req -days 365 -in client.csr -CA ca.pem -CAkey ca-key.pem -CAcreateserial -out client-cert.pem


b) Configure Docker to Use TLS

Update /etc/docker/daemon.json:

{
"hosts": ["unix:///var/run/docker.sock", "tcp://0.0.0.0:2376"],
"tlsverify": true,
"tlscacert": "/etc/docker/certs/ca.pem",
"tlscert": "/etc/docker/certs/server-cert.pem",
"tlskey": "/etc/docker/certs/server-key.pem"
}

Restart Docker:

sudo systemctl restart docker


c) Access the Secure API from the Client

Copy the CA and client certificates to the client machine.

Run Docker commands with TLS options:

docker --tlsverify --tlscacert=ca.pem --tlscert=client-cert.pem --tlskey=client-key.pem -H=tcp://<remote-server-ip>:2376 info



---

4. Verify and Test

Ensure the server is reachable via the specified port.

Use secure methods (e.g., TLS or SSH tunneling) to protect the connection.

https://youtube.com/live/EBPRUR-vV1k?feature=share

https://youtube.com/live/EBPRUR-vV1k?feature=share

https://youtube.com/live/F-0fmIybRak?feature=share

Hi Guys, as you know that our ongoing docker series is freely available to all the subscribers of Nehra Classes during the live sessions only. But in case you don't want to join the live sessions and want to watch these tutorials later you were required to join the extended level membership of our channel.

Now, we have a good news for you. Vikas sir has decided to put this training at standard level not extended because the training is currently going on and is not completed yet.

Now onwards standard level members can also watch these sessions without any issues.

But once this training gets completed it will be made available at extended level only.

Thank you
Nehra Classes

https://youtu.be/1JJTc_bFRZM

https://youtube.com/live/lrIbEqqA-Zk?feature=share

Nehra Classes pinned «https://www.youtube.com/live/xCyhrBUlbrU?si=M1cKP-pL4BszDZ0f»

📢 Notice to Nehra Classes Subscribers: Earn YouTube Badges for Learning! 🎉

Hello Nehra Classes family!

Exciting news! YouTube now offers certificates in the form of digital badges for learners who complete specific quizzes and courses on the platform. This means that for certain modules and quizzes provided by Nehra Classes, you can earn badges that will appear on your YouTube profile, showcasing your achievements and dedication to learning.

How It Works:

1. Participate in Nehra Classes’ quizzes and learning modules.


2. Complete the courses and quizzes as outlined in our videos.


3. Earn digital badges as a recognition of your hard work and effort!



These badges can be a great addition to your profile, showing the skills and knowledge you've gained with us. This feature enhances your learning experience and gives you something valuable to showcase!

Stay tuned for more updates on our upcoming quizzes and courses where you can earn these badges. Let’s keep learning and achieving together!

Warm regards,
Nehra Classes Team

https://www.youtube.com/live/xCyhrBUlbrU?si=M1cKP-pL4BszDZ0f

https://youtube.com/playlist?list=PL9LY4jTSNS23ti3R5m-mXjHEZXakOotAQ&si=EVWFPTJAuA7FPL-l

https://www.youtube.com/live/eSWYNjBZLRE?si=9VwbS2Gs07X0wleD

Likes Target = 125 Only

Nehra Classes pinned «https://www.youtube.com/live/uaYkEAW3Aks?si=tezd_SWL6LhIGAzh Likes Target = 100 only»

https://www.youtube.com/live/uaYkEAW3Aks?si=tezd_SWL6LhIGAzh

Likes Target = 100 only

https://youtube.com/live/dKqZ9hw9r7s?feature=share

A milestone as bright as Diwali! Nehra Classes has reached 50,000 subscribers, each of you a spark that fuels our passion for education. Thank you for making this possible!
#HappyDiwali
#50KSubscribers

"50k sparks of knowledge lighting up our YouTube family on this Diwali! We're grateful for each one of you who joined us in our journey to make learning accessible and impactful."
#HappyDiwali

https://youtube.com/live/yWyxU_yEILQ?feature=share

You have been given a special discount of *50% off up to ₹ 100* to purchase courses. Use the coupon code *HAPPYDIWALI* to avail the discount before time’s up! Buy Now: Nehra Classes App : http://ljeizx.on-app.in/app/store?orgCode=ljeizx

Nehra Classes pinned «https://youtube.com/live/Qj7WMm2EQQs?feature=share»

https://youtube.com/live/Qj7WMm2EQQs?feature=share

Nehra Classes pinned «https://youtube.com/live/5jNMgGTd0kQ?feature=share»

https://youtube.com/live/5jNMgGTd0kQ?feature=share

https://www.udemy.com/course/red-hat-enterprise-linux-9/
Thanks for your support, udemy removed the content.

Nehra Classes pinned «https://youtube.com/live/T_0zk_zn9UY?feature=share Please don't miss this special live session on AWS KMS on 20/10/2024 at 09:30 PM IST»

https://youtube.com/live/T_0zk_zn9UY?feature=share
Please don't miss this special live session on AWS KMS on 20/10/2024 at 09:30 PM IST

Lecture - 71 RHCSA Exam, our original video is uploaded there.