OS CBT

Name: OS CBT
Address: 2nd Floor, Ashrafia Complex, Rehman Pura More, Ferozepur Road, Fazlia Colony, Punjab, Lahore, 54000, PK
Telephone: +923214255894

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We are team of technical experts of almost all IT domains. We provide services like Software develop

OPUS SOLUTION (PVT) LTD provides a range of Information Technology Services exclusively designed for businesses growth, from Networking, Data security, Designing and Development to Skill-based Trainings. Headquartered in Lahore (Pakistan), having team of local and international certified trainers and experts. Our focus is not only to provide professional skill-based trainings but also to run infor

mation technology solutions for companies. In response to customer needs and in order to fully cover, We deliver the most comprehensive suite of managed skill-based trainings and IT services around the globe. Our known Quality Service allows us to provide all our customers with an efficient, seamless and worry-free “Remote IT Department”.

09/06/2025

09/06/2025

*Mega.nz Courses:*

*1- Pentesters Practical Approach for Bug Hunting and Bug Bounty 2025*

Language : English

*Download link*

https://mega.nz/file/9FQ20Lra

*2- Programming for Kids and Beginners Code using Scratch*

Language : English

*Download link*

https://mega.nz/file/cBhnUbjT -EuLsCFIsU47oEL7tFFZ40YehFWisEUSsExbm_x1mc

*3- Rocky Linux Practical Course*

Language : English

*Download link*

https://mega.nz/file/AZRznKSQ -M6ZeCQvcak5AS25CZ6AU

*4- Ultimate Course on IT Backups and Disaster Recovery*

Language : English

*Download link*

https://mega.nz/file/oRA2gBqa

*5- Binary Exploits with Python*

Language : English

*Download link*

https://mega.nz/file/W8BlwQyD

*6- Exploit Development Tutorial for Hackers and Pentesters*

Language : English

*Download link*

https://mega.nz/file/X8ZWlagZ

*7- Introduction-to-Exploit-Zero-Day-Discovery-and-Development*

Language : English

*Download link*

https://mega.nz/file/jhBUFAoI

👨‍👦‍👦 Join my *IT Professional Squad* WhatsApp Channel to get daily Courses links & Hacking Tricks:

https://whatsapp.com/channel/0029VaxILKPL7UVWrI0wmJ0G

👨‍👦‍👦 Join my *IT Professional Jobs Squad* WhatsApp Channel to get daily jobs not only IT but in every Field:

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*******on

30/05/2025

*UDEMY COURSE BUNDLES*

Coupons Valid For limited time

*1- Mastering the CCNA 200-301: Complete Guide to Networking*

https://www.udemy.com/course/mastering-the-ccna-200-301-complete-guide-to-networking/?couponCode=481C58B4A3E3B01FD914

*2- LPI Linux Essentials 010-160 Certification Exam Practice*

Want to pass LPI 010-160 exam? You need practice, not just watching entertaining videos!

https://www.udemy.com/course/lpi-linux-essentials-010-160-exam-questions/?couponCode=B61D41F28C4F117A5C77

*3- PMP Certification Exam Simulator 2025: 980+ Questions*

Pass Your PMP Certification! Project Management Mock Tests for PMBOK7, ECO, Agile & Hybrid Success.

https://www.udemy.com/course/pmp-certification-exam-simulator/?couponCode=FREEACCESS

*4- AI Fundamentals: Identify Your Interests and Career Path*

Explore the Foundations of AI: Unlock Key Concepts in Machine Learning, Robotics, and More

https://www.udemy.com/course/ai-fundamentals-identify-your-interests-and-career-path

https://www.udemy.com/course/learn-php-and-mysql-for-web-application-and-web-development?couponCode=49AAAFFBD9323AE7A7F4

*5- Python And Flask Demonstrations Practice Course*

This course is a Great Practice to both fundamental python programming concepts and the Flask Framework by demonstration

https://www.udemy.com/course/python-and-flask-only-demonstration-course/?couponCode=003F5842256D3D3DE5E2

*6- AI Graphic Design Masterclass: Logos, Thumbnails & More*

Learn to design logos, thumbnails, mockups, and viral graphics using AI tools like ChatGPT—no graphic design experience

https://www.udemy.com/course/ai-graphic-design-masterclass

*7- Python Launchpad: Data Structures & I/O | Beginners*

A Quick and Easy Introduction to Python Programming

https://www.udemy.com/course/python-launchpad-data-structures-io-beginners

*8- ITS-303 Python Certification Exam IT Specialist Preparation*

Formerly Microsoft MTA 98-381: Prepare for your Certification Exam Information Technology Specialist ITS-303 Python 2025

https://www.udemy.com/course/its-303-python-certification-exam-t-specialist-preparation?couponCode=1B654BF25A756B25A3F6

*9- ISO 20000-1 IT SMS - Fast Track to IT Service Awareness*

Build Foundational Awareness of ISO 20000-1 and IT Service Management Principles

https://www.udemy.com/course/iso-20000-1-it-sms-fast-track-to-it-service-awareness/?couponCode=WORLDMARKETINGDAY

*10- AWS Certified Solutions Architect SAA-C03: 30-Day Bootcamp*

Learn AWS SAA-C03 Certification in 30 Days with Hands-On Labs, Exam Tips, and Career Guidance

https://www.udemy.com/course/aws-certified-solutions-architect-associate-saa-c03-30daychallenge/?couponCode=KEEPLEARNING

*11- AWS EC2 : AWS Certified Solutions Architect - Associate*

AWS EC2 for AWS Certified Solutions Architect - Associate: Step-by-Step Guide for Beginners (Non-Native English Speakers

https://www.udemy.com/course/aws-ec2-aws-certified-solutions-architect-associate/?couponCode=D3963C2921DD2AEBCC86

*12- VMware vSphere Mastery: Build and Manage Virtualized Infra*

The Ultimate VMware vSphere A to Z Course: Hands-On Guide to Virtualization Management

https://www.udemy.com/course/vsphere-zero-hero/?couponCode=35C1FD49EBC31ED396E4

👨‍👦‍👦 Join my IT Professional Squad WhatsApp Channel to get daily Courses links & Hacking Tricks:

https://whatsapp.com/channel/0029VaxILKPL7UVWrI0wmJ0G

👨‍👦‍👦 Join my IT Professional Jobs Squad WhatsApp Channel to get daily jobs not only IT but in every Field:

https://whatsapp.com/channel/0029VbAIO0Q5vKA6UFtJho2W

-301 *******on *******ontesting

25/05/2025

*Mastering Threat Intelligence: Tools Every Analyst Should Know*

Cyber Threat Intelligence isn't just about reacting—it's about predicting. Here are essential tools and resources to level up your CTI game:

URL & IP Reputation Checks: Use VirusTotal, AbuseIPDB, and CyberGordon for real-time analysis.

File & Malware Analysis: Dive into Hybrid Analysis, Joe Sandbox, and Cuckoo Sandbox.

Web Filtering & Review: Validate URLs using Palo Alto Networks and FortiGuard.

Domain Intelligence: Use Whoxy, Whois, and DNS Twister for deep domain insights.

Attack Surface Mapping: Tools like Shodan and ZoomEye help uncover exposed assets.

Webcheck: Get an attacker’s view of your site in seconds — web-check.xyz

Proactive threat intel = stronger defense

👨‍👦‍👦 Join my *IT Professional Squad* WhatsApp Channel to get daily Courses links & Hacking Tricks:

https://whatsapp.com/channel/0029VaxILKPL7UVWrI0wmJ0G

👨‍👦‍👦 Join my *IT Professional Jobs Squad* WhatsApp Channel to get daily jobs not only IT but in every Field:

https://whatsapp.com/channel/0029VbAIO0Q5vKA6UFtJho2W

20/05/2025

Simplifying RAID

RAID (Redundant Array of Independent Disks) is a storage technology that combines multiple hard drives or SSDs into a single logical unit.
Its main goals are to improve performance, ensure data redundancy, or both depending on the RAID level used. RAID can be implemented via hardware (dedicated controllers) or software (OS-level configurations).

Key RAID Types and Related Concepts

• Standalone: A single drive setup. No redundancy or performance enhancement simple and straightforward, but offers no fault tolerance.

• Cluster: A group of servers working together to provide redundancy, high availability, and load balancing. While not a RAID configuration itself, clusters are often used alongside RAID to protect against both hardware and system failures.

• Hot Swap: The ability to replace or add drives without powering down the system. Common in RAID systems to minimize downtime during drive failures or upgrades.

RAID Levels

• RAID 0 (Striping): Splits data across two or more drives for increased read/write speed. Offers no redundancy if one drive fails, all data is lost. Ideal for performance-focused setups where data loss is acceptable.

• RAID 1 (Mirroring): Duplicates the same data on two drives. Offers excellent fault tolerance if one drive fails, the other continues to function. However, usable storage is halved.

• RAID 5 (Striping with Parity): Stripes data across at least three drives, with parity information allowing for recovery from a single drive failure. Balances performance, storage efficiency, and fault tolerance.

• RAID 0+1 (Striped + Mirrored): Combines the speed of striping (RAID 0) with the redundancy of mirroring (RAID 1). Requires at least four drives. Provides both performance and protection, but loses more usable space than RAID 5.

RAID is widely used in both enterprise and home environments for data protection, server resilience, and faster access speeds. However, RAID is not a substitute for regular backups. Always pair RAID with a robust backup strategy.

‍👨‍👦‍👦 Join my *IT Professional Squad* WhatsApp Channel to get daily Jobs and Courses Link:
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18/05/2025

We often hear the phrase *"The cloud is everywhere"* , however this is not completely correct.

Cloud companies such as Amazon Web Services, Microsoft Azure, and Google Cloud have physical data centers in specified locations known as regions and availability zones. These are not distributed randomly over the earth. They're arranged strategically. When someone say "Your data is in the cloud", they really mean that it is stored in someone else's data center, usually not far away. That "Not far away' component is crucial. Let me clarify. To eliminate delays and improve speed, cloud providers establish edge locations and CDNs (Content Delivery Networks) that transport data and services closer to customers. They don't move the Entire Cloud instead, they move the essential parts near you. When you visit a website or utilize a cloud service, most of what you see comes from a server in your city, rather than from the other side of the globe. Understanding this helps clarify why latency, region selection, and content delivery are so important, not only for network engineers but also for database administrators, security personnel, app developers, and, I believe, entire IT teams. The cloud isn't magic. It's real. And it's strategically positioned.

14/05/2025

🔌 Boost Your Networking Knowledge 🔌
Knowing your networking protocols and port numbers is essential, whether you're an IT pro, a student, or prepping for certifications like CCNA or CompTIA. Here's a handy cheat sheet to keep in your toolkit! 👇
📘 Common Networking Protocols & Their Ports:
🌐 HTTP – 80
🔒 HTTPS – 443
📂 FTP – 21 (Control), 20 (Data)
🔐 SFTP/SSH – 22
📧 SMTP – 25 | POP3 – 110 | IMAP – 143
🛡️ SMTPS/POP3S/IMAPS – 465/995/993 (Secure Mail)
📡 DNS – 53
🖥️ RDP – 3389
🕒 NTP – 123
📦 SNMP – 161
🗂️ LDAP/LDAPS – 389/636
🧰 MySQL/PostgreSQL/MSSQL – 3306/5432/1433
📃 Syslog – 514
📺 Telnet – 23 (Not secure, but still asked in interviews!)
📁 SMB/CIFS – 445
📻 NetBIOS—137–139
🌐 DHCP – 67/68
💡 Pro Tip: Secure protocols usually have higher port numbers (e.g., HTTPS > HTTP, IMAPS > IMAP).
📌 Save this post, share it with your team, or use it to brush up before your next job interview or exam!

12/05/2025

Do you know why every Network Engineer must learn Git in 2025?

🔧 Still managing configs manually?

🧩 Struggling to track who changed what — and when?

In today's world of automation and agile networks, Git is no longer optional for network engineers.
It’s your version control system, your audit log, your rollback safety net — all in one.
🔍 In this guide, I’ve covered:
✅ Daily Git workflows tailored for network teams
✅ How to back up, compare, and restore device configs
✅ Using Git with Netmiko and Ansible
✅ Disaster recovery workflows using Git history
✅ Visual flowcharts and real-world automation examples

Whether you're starting your journey or looking to improve your NetDevOps practice — this resource will help you adopt Git the right way for managing network infrastructure.

🛠️ Includes VLAN configuration examples, flow diagrams, and Git best practices.

👉 Dive in and let me know how you’re using Git in your network!
📥 Please connect and send me a "hi", so that i can DM you the PDF!

Download the Manual from link below:

https://www.linkedin.com/posts/opussolution_git-activity-7327813289923526657-EoVj?utm_source=share&utm_medium=member_ios&rcm=ACoAAB8pa4UBx-d2Q3ewwyqmiFQ6CF39KuBJ4y0

‍👨‍👦‍👦 Join my *IT Professional Squad* WhatsApp Channel to get daily Jobs and Courses Link:
https://whatsapp.com/channel/0029VaxILKPL7UVWrI0wmJ0G

17/04/2025

Advanced Linux System Administration Interview Questions

Think you've mastered ?

Being a sysadmin isn't just about knowing commands; you need sharp problem-solving, performance tuning, and troubleshooting skills to handle real-world challenges.

Test your knowledge and see where you stand!

Download the Manual from link below:

https://www.linkedin.com/posts/opussolution_advanced-linux-system-interview-questions-activity-7318528115968761856-qnHu?utm_source=share&utm_medium=member_ios&rcm=ACoAAB8pa4UBx-d2Q3ewwyqmiFQ6CF39KuBJ4y0

‍👨‍👦‍👦 Join my *IT Professional Squad* WhatsApp Channel to get daily Jobs and Courses Link:
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Tuning

16/04/2025

What is Cisco ACI? Simplified.

👉 It is Application Centric Infrastructure.

👉 ACI is an SDN solution designed for data centers.

👉 ACI simplifies network infrastructure management by using unified network policies instead of configuring each network device individually.

👉 ACI makes the network infrastructure as one fabric.

👉 ACI controls and configures the whole fabric from GUI instead of logging into each device from CLI.

👉 ACI uses a common brain which is ACI Fabric OS that is installed on all the network devices and managed by a centralized controller called APIC.

👉 This shared OS makes it possible for the various switches within the ACI network to translate policies into infrastructure designs.

👉 Application Centric Infrastructure Controller (APIC) is a software control center to configure and run this infrastructure.

👉 APIC creates the policies that define the data center’s network infrastructure.

👉 ACI fabric topology includes APIC, Spine switches and Leaf switches.

👉 Think of ACI Spine switch as a traditional distribution switch and ACI Leaf switch as an access switch.

👉 ACI uses a dedicated new line of hardware and not all existing switches like N5K or N7K support it.

👉 ACI uses Nexus 9000 series switches running ACI Fabric OS as Spine or Leaf switches.

🔑 Key Features and Benefits of ACI

Cisco ACI enables organizations to easily create a software-defined data center, which provides several benefits, including:

➡️ Flexibility: The whole infrastructure is managed as a single device/fabric, and it is easy to configure and maintain.

➡️ Consistent Infrastructure: Cisco ACI abstracts away the details of the underlying infrastructure. This makes it easier to design and configure network environments.

➡️ Automation and Orchestration: Cisco ACI makes heavy use of automation to develop network infrastructure based on network policies. This makes changes easy to implement and monitor and increases scalability.

➡️ Support for Hybrid Environments: Cisco ACI supports both on-prem and cloud-based infrastructure, making it possible to deploy ACI environments across multiple different environments.

ACI is a huge topic, but I tried to put together all the conceptual points related to ACI.

What's your take on ACI? Let's discuss. 👇

If you found this post helfpful, please help more people see this:

✅ Like
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14/04/2025

OSPF vs EIGRP: The Classic Showdown in Dynamic Routing

If you’ve ever had to choose between OSPF and EIGRP, you know it’s not just about protocol—it’s about the right fit for your environment.

OSPF brings:

▶️ Vendor-neutral compatibility
▶️ Link-state robustness
▶️ Dijkstra’s algorithm for precise path calculation
▶️ But with a bit more CPU/memory overhead

EIGRP offers:

▶️ Lightning-fast convergence
▶️ Smarter metrics with bandwidth, delay, and reliability
▶️ The efficiency of the DUAL algorithm
▶️ And yes, it now plays nice as an open standard (since 2013!)

Key Differences?

▶️ OSPF = Equal-cost load balancing
▶️ EIGRP = Equal and unequal-cost load balancing

AD for OSPF = 110

EIGRP = 90 (internal), 170 (external)

Both are powerful. Your choice depends on design goals, vendor landscape, and operational priorities.

Which do you prefer in your production networks—and why?

‍👨‍👦‍👦 Join my *IT Professional Squad* WhatsApp Channel to get daily Jobs and Courses Link:
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14/04/2025

SIEM Use Cases For Cybersecurity Analyst

1. Brute Force Detection
2. Malware Detection
3. Data Exfiltration Detection
4. Suspicious Network Activity
5. Phishing Email Detection
6. Unauthorised Access Attempt
7. Suspicious File Download
8. Privilege Escalation Attempt
9. Lateral Movement Detection
10. Command and Control (C2) Traffic Detection
11. Anomalous User Behavior
12. DNS Tunneling Detection
13. Insider Threat Detection
14. Suspicious Process Ex*****on
15. File Integrity Monitoring
16. Web Server Attack Detection
17. Unusual Login Location
18. DDoS Attack Detection
19. Ransomware Activity Detection
20. Exploit Attempt Detection
21. Failed Login Attempts Threshold
22. Credential Dumping Detection
23. Port Scanning Activity
24. Suspicious PowerShell Command Ex*****on
25. Rogue Access Point Detection
26. New Service Installation
27. Anomalous Database Query
28. Unauthorised File Access
29. Suspicious USB Device Activity
30. Firewall Policy Change Detection
31. Privileged Account Login Outside Business Hours
32. Endpoint Isolation Trigger
33. Suspicious Registry Key Modification
34. Active Directory Enumeration
35. Email Spoofing Detection
36. Suspicious Application Installation
37. HTTP Anomalies Detection
38. Network Traffic Spikes
39. User Account Creation
40. File Encryption Activity Detection
41. Suspicious VPN Connection
42. DNS Query for Known Malicious Domains
43. Unusual Process Parent-Child Relationship
44. SMB Lateral Movement Detection
45. Excessive File Access by a Single User
46. Suspicious Archive File Extraction
47. Detection of Default or Weak Credentials
48. Suspicious Scheduled Task Creation
49. Remote Desktop Protocol (RDP) Anomalies
50. Beaconing Traffic Detection
51. Shadow IT Application Usage
52. Cloud Storage Upload Spikes
53. Unauthorised Configuration Change
54. Tor Network Connection Detection
55. Anomalous File Deletion Patterns
56. Unauthorised API Call Detection
57. System Crash Dump Access
58. Browser Exploit Detection
59. Abnormal SSL Certificate Usage
60. Suspicious Script Ex*****on in Browsers
61. Suspicious Outbound Traffic Volume
62. Email Attachment with Executable Files
63. Unauthorised Network Share Access
64. Excessive Admin Privilege Assignments
65. Anomalous Device Connection in Network
66. Suspicious Command Ex*****on in CLI
67. Endpoint Beaconing to Non-Standard Port
68. Exploit Kit Activity Detection
69. Unauthorised Cloud Account Login
70. Excessive DNS Requests to External Servers
71. Suspicious DHCP Activity
72. Unauthorised Firmware Updates
73. Unusual IoT Device Behavior
74. Credential Harvesting Attempt Detection
75. Abuse of Remote Management Tools
76. Unauthorised Access to Backup Files
77. Unusual Binary Ex*****on from Temp Directory
78. Suspicious ZIP/RAR File Creation
79. Unauthorised Access to Financial Data
80. Abuse of Group Policy Objects (GPO)

Address

2nd Floor, Ashrafia Complex, Rehman Pura More, Ferozepur Road, Fazlia Colony, Punjab
Lahore
54000

Telephone

+923214255894

Website

https://opussolution.net/

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