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📈From Zero to DevOps: Week 4 – Building a Strong Foundation in Linux Networking- TCP Working

TCP (Transmission Control Protocol) is a reliable, connection-oriented protocol at the transport layer of the OSI model.
The TCP 3-way handshake is crucial for establishing a connection, involving SYN, SYN-ACK, and ACK packets.
Data transmission in TCP involves segmenting data, acknowledging segments, and retransmitting lost segments for reliability.
TCP utilizes flow control to manage data transmission speed between senders and receivers efficiently.
TCP implements congestion control mechanisms like slow start to prevent network congestion and ensure fair data sharing.
TCP connection termination follows a four-step process with FIN and ACK messages for a graceful closure.
Sequence numbers in TCP uniquely identify each byte of data to maintain order and detect missing packets.
TCP handles lost segments by slowing down transmission and retransmitting only the missing segment.
Flow control in TCP involves informing the sender of the receiver's buffer capacity to prevent overwhelm.
Congestion control in TCP helps manage network traffic efficiently by adjusting sending rates based on network conditions.

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Macdailynews

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Apple announces WWDC25 schedule

Apple has announced the schedule for its Worldwide Developers Conference 2025 (WWDC25), which will be held online from June 9-13.
The conference will offer over 100 sessions for developers to learn about the latest Apple tools, technologies, and features.
Events include the Keynote on June 9 at 10 a.m. PDT, Platforms State of the Union at 1 p.m. PDT, technical sessions, guides, group and one-on-one labs, and the Swift Student Challenge.
Additionally, Apple TV+ announced the renewal of 'Women in Blue' and a new Peanuts musical special, 'Snoopy Presents: A Summer Musical,' premiering on July 18, 2025.

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Ubuntu

Simon Quigley: Loose Cannons and Orwellian Tactics

The author, Simon Quigley, expresses frustration over rumors being spread about his mental state and legal threats being made against him.
He demands an apology and asks for the use of Orwellian tactics to stop to silence him.
Quigley asserts his 1st amendment rights as a United States citizen and insists on standing up for himself.
He expresses readiness to defend himself against mistreatment and mentions having evidence to support his claims.

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Macdailynews

238

Warner Bros. and IMAX expand premiere screenings of Apple’s ‘F1 The Movie’ to 400 IMAX theaters worldwide

Warner Bros. Pictures and IMAX are expanding Fan-First Premiere Screenings of Apple Original Films' 'F1 The Movie' to 400 IMAX locations worldwide due to overwhelming popularity.
Tickets for the IMAX-exclusive June 23 screenings and all available showtimes of the film will be available for purchase starting on May 21.
'F1 The Movie' features a star-studded cast including Brad Pitt, Javier Bardem, and Damson Idris, and is directed by Joseph Kosinski.
The film follows the story of a former Formula 1 phenom making a comeback to the sport, exploring themes of competition and redemption.

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Ubuntu Handbook

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How to Install Plasma Desktop 6.4 (Beta) in (K)Ubuntu 25.04

KDE Plasma 6.4, the upcoming feature version, was released as the first beta with various updates and improvements.
New features in Plasma 6.4 include enhancements to the screenshot tool, a new animations setting panel, context menu options for app icons, and more.
Changes in Dolphin file manager now allow users to set drag and drop behavior to 'move' in the General Behavior settings page.
To install Plasma 6.4 Beta in (K)Ubuntu 25.04, add the beta PPA, update the desktop environment with 'sudo apt full-upgrade', and install the desktop using 'sudo apt install kubuntu-desktop'.

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Macdailynews

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Apple’s App Store approves Epic Games’ ‘Fortnite’ in the U.S. and E.U.

Epic Games' 'Fortnite' has been approved to return to Apple's U.S. App Store and also the European Union, marking the end of a nearly five-year ban.
This decision follows a legal battle between Epic Games and Apple, with Epic Games alleging Apple's practice of charging up to 30% commission on in-app payments violated U.S. antitrust rules.
Analyst Gil Luria stated that this win for Epic Games might come at a steep price and could be too late to significantly boost the Fortnite game that is now considered past its prime.
In addition to the App Store, the game was also available on the Epic Games Store and AltStore in the European Union, as per Fortnite's announcement.

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Ubuntu

Simplify security maintenance and compliance with Ubuntu Pro auto-attach for LXD guests

Ubuntu Pro now supports auto-attachment for LXD guest instances, simplifying security maintenance and compliance for organizations.
Previously, enabling Ubuntu Pro inside an LXD guest required manual steps, but the new auto-attach feature allows Pro-attached hosts to automatically extend privileges to their containers and virtual machines.
Auto-attach feature brings benefits like expanded security maintenance, compliance, kernel livepatching, and security coverage to containerized and virtual workloads effortlessly.
Users can manage auto-attachment at the profile level or for each guest, providing a faster and scalable alternative to manual token attachment. This enhancement simplifies Pro-enabled MicroCloud deployment and strengthens security across various environments.

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Tech Radar

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Got a Windows 11 PC and an Android phone? Microsoft wants to make using apps across those devices a seamless experience

Microsoft is introducing a new 'Cross Device Resume' feature in Windows 11, similar to Apple's Handoff, which allows for seamless app switching between Windows 11 PC and Android smartphones.
The feature was showcased at Build 2025, demonstrating the ability to resume activities between an Android device and Windows 11 PC, with apps like Spotify and potentially WhatsApp incorporating this functionality.
Although Microsoft removed the demonstration video of Cross Device Resume, leaked screenshots suggest that switching from an Android phone to a Windows 11 PC will allow users to continue tasks from where they left off on the mobile device.
Microsoft is working on providing software developers with the tools to integrate the Cross Device Resume feature into their apps, potentially expanding beyond OneDrive to cover a range of applications, although the feature is not yet publicly available.

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TechViral

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How to run Malwarebytes and Windows Defender at the same time

Windows Security and Malwarebytes are both effective security programs offering real-time protection and threat detection.
Windows Defender automatically turns off when Malwarebytes is installed to prevent conflicts.
While it's generally recommended to use only one antivirus program, some users successfully run Windows Defender and Malwarebytes simultaneously.
To run Malwarebytes and Windows Defender together, users need to adjust Malwarebytes settings by turning off the registration in the Windows Security Center.

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Macrumors

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Use Your iPhone as a Microphone for Your Mac

macOS Ventura introduced the ability to use iPhone as a microphone for Mac.
Continuity Camera feature allows iPhone to serve as a high-quality audio input for Mac.
Steps to set it up include accessing Sound settings on Mac and selecting iPhone under Input tab.
The connection can be paused or disconnected easily, providing a seamless experience.

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TechViral

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How To Fix Error Code 16: This Request Was Blocked By The Security Rules

Encountering errors like 'Access denied error code 16' despite strong internet and security tools is common.
Error code 16 occurs due to ISP, Antivirus, or Firewall blocking certain websites, causing access issues.
Tips to resolve error code 16 include checking date & time settings to ensure SSL validation; accessing the site from another device can identify PC network issues.
Disabling Proxy server on Windows and updating the operating system are recommended steps to fix the error.
Resetting web browser settings, disabling Antivirus & Firewall, and using a VPN for blocked sites are effective solutions.
Contacting ISP for assistance is advised if other methods fail to resolve the error code 16.
By following these methods, users can address the 'Request Blocked By Security Rules' error effectively.

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Automatetheplanet

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Windows Tests Running Slow? Maybe Not for Long…

Windows desktop automation poses challenges such as slow execution, flaky tests, and inconsistent behavior across environments.
Existing tools like WinAppDriver and Appium's Windows driver fall short due to lack of updates, limited Windows support, and performance issues.
Introducing NovaWindows Driver as a solution to overcome these challenges, providing fast and reliable performance, smooth mouse movements, and improved support for complex UI elements.
The NovaWindows Driver is open-source, encouraging community contributions for enhancements and new features.
Transitioning to NovaWindows Driver from Appium Windows Driver is simple, with minimal changes required in test scripts.
For those migrating from WinAppDriver, transitioning to Appium first is recommended, with straightforward changes in capabilities format and command structure.
Bellatrix Test Automation Framework offers built-in support for NovaWindows, facilitating a robust foundation for desktop automation tests.
Overall, NovaWindows Driver aims to improve Windows desktop automation speed, reliability, and user experience, while promoting community collaboration and development.

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TechViral

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How to Block Users From Installing Programs in Windows 11

You can prevent users from installing programs on Windows 11 without installing any third-party apps.
Methods include setting Windows 11 to only install apps from the Microsoft Store, using Group Policy Editor, or the Registry Editor.
To block program installation via Settings, navigate to Advanced App settings, choose where to get apps, and select The Microsoft Store Only.
To use Local Group Policy Editor or Registry Editor, follow the steps provided to prohibit user installs and block program installation on Windows 11.

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Securelist

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Dero miner zombies biting through Docker APIs to build a cryptojacking horde

A new Dero mining campaign involves infected containers exploiting insecurely published Docker APIs to create a cryptojacking horde.
Malicious containers were detected during a compromise assessment project, leading to the discovery of a threat actor exploiting Docker APIs.
Two malware implants, nginx and the Dero crypto miner, written in Golang, are used in an automated attack vector to infect new victims.
The nginx malware ensures persistence, spreads without a command-and-control server, and targets insecure Docker APIs to infect new networks.
The malware propagates by scanning IPv4 subnets, identifying open Docker API ports, creating new malicious containers, and compromising existing ones.
The malware infects containers by installing dependencies, transferring malicious implants, and maintaining persistence for continuous mining activities.
The cloud malware encrypts configuration details, including wallet and Dero node addresses, aiming to sophisticate the malware.
The attack campaign emphasizes the threat posed to containerized environments and the importance of monitoring and protecting container infrastructures.
Security measures like using efficient monitoring tools and proactively hunting for threats are recommended to safeguard container environments.
Indicators of compromise, such as file hashes, paths, and specific addresses, are provided to help in detecting and mitigating such malicious activities.

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Ubuntu Handbook

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NetBeans 26 Added Java SE 25 Support for Tomcat, TomEE & GlassFish

Apache NetBeans announced the release of version 26 after 3 months of development. The update includes better HiDPI support for UI elements and 150 icons have been updated to SVG format for improved display on HiDPI/Retina screens.
NetBeans 26 has added support for Java SE 25 for Tomcat, TomEE, and GlassFish, which is expected to be released on September 16. Other additions include OpenJDK hotspot tests support, port forward command for Oracle Cloud Assets, Jakarta EE 11 and Swing GUI templates enhancements, and bug fixes.
Furthermore, the release removed the inactive Security Manager since JDK 24, disabled by default in v25, and deprecated Integer constructor usage. Additional changes involve upgrading Gradle Tooling API, default settings for Micronaut applications, container query length units support for CSS, async generator methods, and various other enhancements.
Users can download NetBeans 26 from Apache NetBeans official packages. Ubuntu users can install the snap package from App Center or download the native .deb package for installation.

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