explainshell.com

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Match linux command-line arguments to view their help text.

stackshare.io

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Dev / Production stacks for all to see. Handy tool to see what software is trending today.

aws.amazon.com

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Amazons’s cloud computing & web hosting service.

Amazon OpenSearch Serverless now supports Derived Source for storage optimization

13 April 2026 @ 8:55 pm

Amazon OpenSearch Serverless introduces support for Derived Source, a new feature that can help reduce the amount of storage required for your OpenSearch Service collections. With derived source support, you can skip storing source fields and dynamically derive them when required.  With Derived Source, OpenSearch Serverless reconstructs the _source field on the fly using the values already stored in the index, eliminating the need to maintain a separate copy of the original document. This can significantly reduce storage consumption, particularly for time-series and log analytics collections where documents contain many indexed fields. You can enable derived source at the index level when creating or updating index mappings. Derived Source support is available today in all AWS Regions where Amazon OpenSearch Serverless is supported. For more information, see

Amazon Redshift introduces key performance optimization for Top-K queries

13 April 2026 @ 6:58 pm

Amazon Redshift further optimizes the processing of top-k queries (queries with ORDER BY and LIMIT clauses) by intelligently skipping irrelevant data blocks to return results faster, dramatically reducing the amount of data processed. This optimization reorders and efficiently adjusts the data blocks to be read based on the ORDER BY column's min/max values, maintaining only the K most qualifying rows in memory. When the ORDER BY column is sorted or partially sorted, Amazon Redshift now processes only the minimal data blocks needed rather than scanning entire tables, eliminating unnecessary I/O and compute overhead. This enhancement particularly benefits top-k queries when the data permanently stores in descending order (ORDER BY ... DESC LIMIT K) on large tables where qualifying rows are appended at the end of the data storage. Common examples include: Finding the k most recent orders from millions or billio

Aurora DSQL launches connector that simplifies building PHP applications

13 April 2026 @ 5:47 pm

Today we are announcing the release of the Aurora DSQL Connector for PHP (PDO_PGSQL) that makes it easy to build PHP applications on Aurora DSQL. The PHP Connector streamlines authentication and eliminates security risks associated with traditional user-generated passwords by automatically generating tokens for each connection, ensuring valid tokens are always used while maintaining full compatibility with existing PDO_PGSQL features. The connector handles IAM token generation, SSL configuration, and connection pooling, enabling customers to scale from simple scripts to production workloads without changing their authentication approach. It also provides opt-in optimistic concurrency control (OCC) retry with exponential backoff, custom IAM credential providers, and AWS profile support, making it easier to develop client retry logic and manage AWS credentials. To get started, visit the

Amazon EC2 R8i and R8i-flex instances are now available in AWS GovCloud (US-West) Region

13 April 2026 @ 5:00 pm

Starting today, Amazon Elastic Compute Cloud (Amazon EC2) R8i and R8i-flex instances are available in the AWS GovCloud (US-West) Region. These instances are powered by custom Intel Xeon 6 processors, available only on AWS, delivering the highest performance and fastest memory bandwidth among comparable Intel processors in the cloud. The R8i and R8i-flex instances offer up to 15% better price-performance, and 2.5x more memory bandwidth compared to previous generation Intel-based instances. They deliver 20% higher performance than R7i instances, with even higher gains for specific workloads. They are up to 30% faster for PostgreSQL databases, up to 60% faster for NGINX web applications, and up to 40% faster for AI deep learning recommendation models compared to R7i. R8i-flex, our first memory-optimized Flex instances, are the easiest way to get price performance benefits for a majority of memory-intensive workloads. They offer the most common sizes, from large to 16xlarge, an

Amazon CloudWatch Logs Insights now supports saved queries with parameters

13 April 2026 @ 5:00 pm

Amazon CloudWatch Logs Insights saved queries now support parameters, allowing you to pass values to reusable query templates with placeholders. This eliminates the need to maintain multiple copies of nearly identical queries that differ only in specific values such as log levels, service names, or time intervals. You can define up to 20 parameters in a query, with each parameter supporting optional default values. For example, you can create a single template to query logs by severity level (such as ERROR or WARN) and pass different service names each time you run it. To execute a query with parameters, invoke it using the query name prefixed with $ and pass your parameter values, such as $ErrorsByService(logLevel="ERROR", serviceName="OrderEntry"). You can also use multiple saved queries with parameters together for complex log analysis, significantly reducing query maintenance overhead while improving reusability. Saved queries with parameters are available in a

Amazon EC2 M8i and M8i-flex instances are now available in AWS GovCloud (US-West) Region

13 April 2026 @ 5:00 pm

Starting today, Amazon EC2 M8i and M8i-flex instances are now available in AWS GovCloud (US-West) Region. These instances are powered by custom Intel Xeon 6 processors, available only on AWS, delivering the highest performance and fastest memory bandwidth among comparable Intel processors in the cloud. The M8i and M8i-flex instances offer up to 15% better price-performance, and 2.5x more memory bandwidth compared to previous generation Intel-based instances. They deliver up to 20% better performance than M7i and M7i-flex instances, with even higher gains for specific workloads. The M8i and M8i-flex instances are up to 30% faster for PostgreSQL databases, up to 60% faster for NGINX web applications, and up to 40% faster for AI deep learning recommendation models compared to M7i and M7i-flex instances. M8i-flex are the easiest way to get price performance benefits for a majority of general-purpose workloads like web and application servers, microservices, small and med

AWS IoT is now available in Israel (Tel Aviv) and Europe (Milan) AWS Regions

13 April 2026 @ 4:10 pm

AWS IoT Core and AWS IoT Device Management services are now available in the Israel (Tel Aviv) and Europe (Milan) AWS Regions. With this expansion, organizations operating in these regions can better serve their local customers and unlock multiple benefits, including faster response times, stronger data residency controls, and reduced data transfer expenses. AWS IoT Core is a managed cloud service that lets you securely connect billions of Internet of Things (IoT) devices to the cloud and manage them at scale. It routes trillions of messages to IoT devices and AWS endpoints, through bi-directional industry standard protocols, such as MQTT, HTTPS, LoRaWAN (select regions). AWS IoT Device Management allows customers to search, organize, monitor and remotely manage connected devices at scale. With the expansion to these regions, AWS IoT is now available in

Amazon FSx now supports copying file system backups across AWS opt-in Regions

13 April 2026 @ 4:00 pm

Amazon FSx now supports copying file system backups across opt-in Regions (AWS Regions that are disabled by default) for Amazon FSx for Windows File Server, Amazon FSx for Lustre, and Amazon FSx for OpenZFS. This launch makes it easier for customers to meet business continuity, disaster recovery, and compliance requirements by extending cross-Region, cross-account backup and recovery capabilities beyond AWS Regions that are enabled by default. Amazon FSx is a fully managed service that makes it easy and cost-effective to launch, run, and scale feature-rich, high-performance file systems in the AWS Cloud. Opt-in Regions are AWS Regions that are disabled by default, in contrast to regions that are enabled by default. Previously, customers could copy Amazon FSx file system backups across regions enabled by

AWS Elastic Disaster Recovery now supports IPv6

13 April 2026 @ 3:30 pm

AWS Elastic Disaster Recovery (AWS DRS) now supports IPv6 for both data replication and control plane connections. Customers operating in IPv6-only or dual-stack network environments can now configure AWS DRS to replicate using IPv6, eliminating the need for IPv4 addresses in their disaster recovery setup. AWS DRS minimizes downtime and data loss with fast, reliable recovery of on-premises and cloud-based applications using affordable storage, minimal compute, and point-in-time recovery. Previously, AWS DRS required IPv4 connectivity for all replication and service communication. Now, customers can set the internet protocol to IPv6 in their replication configuration to use dual-stack endpoints for agent-to-service communication and data replication. This helps customers meet network modernization requirements and enables disaster recovery in environments where IPv4 addresses are unavailable or restricted. Existing replication configurations are not affected and continue to

Amazon EC2 X8i instances are now available in Europe (Paris)

10 April 2026 @ 11:54 pm

Amazon Web Services (AWS) is announcing the general availability of Amazon EC2 X8i instances, next-generation memory optimized instances powered by custom Intel Xeon 6 processors available only on AWS. X8i instances are SAP-certified and deliver the highest performance and fastest memory bandwidth among comparable Intel processors in the cloud. They deliver up to 43% higher performance, 1.5x more memory capacity (up to 6TB), and 3.3x more memory bandwidth compared to previous generation X2i instances. X8i instances are designed for memory-intensive workloads like SAP HANA, large databases, data analytics, and Electronic Design Automation (EDA). Compared to X2i instances, X8i instances offer up to 50% higher SAPS performance, up to 47% faster PostgreSQL performance, 88% faster Memcached performance, and 46% faster AI inference performance. X8i instances come in 14 sizes, from large to 96xlarge, including two bare metal options. X8i instances are available in the fol

networkworld.com

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Information, intelligence and insight for Network and IT Executives.

2026 network outage report and internet health check

14 April 2026 @ 1:46 pm

ThousandEyes, a Cisco company, monitors how ISPs, cloud providers and conferencing services are handling any performance challenges and provides Network World with a weekly roundup of events that impact service delivery. Read on to see the latest analysis, and stop back next week for another update on internet and cloud traffic performance. Note: We have archived prior-year outage updates, including our reports from 2025, 2024,

DNS security is often inadequate, and network engineers should get more involved

14 April 2026 @ 11:00 am

Despite widespread adoption of defensive measures, most IT professionals believe their DNS infrastructure is not secure enough. Enterprise Management Associates (EMA) recently published DDI Directions 2026, a market research report that explores enterprise strategies for DNS, DHCP, and IP address management (DDI). In that report, only 28% of DDI experts said they believe that their DNS infrastructure is completely secure. The risk of insecure DNS This pessimism about

Fixing encryption isn’t enough. Quantum developments put focus on authentication

14 April 2026 @ 8:00 am

We are now entering the era of fault-tolerant quantum computing. The computers are getting better. The qubits are getting faster and more reliable, and there are more of them. NIST published its list of quantum-safe encryption algorithms, and now enterprises are racing to upgrade their encryption before Q-day, the quantum apocalypse that will make the previous generation of encryption protocols obsolete. Many large technology companies, infrastructure providers, and security firms have already committed to encryption upgrades, though enterprises ar

Curious about quantum? Check out training options from ISC2, IBM, AWS and more

14 April 2026 @ 8:00 am

Announcements from quantum computing companies continue to shorten the time before we reach Q-day. That’s the day when quantum computers get powerful enough to use for general business applications—or to break existing encryption standards. According to the latest Forrester projection, that is likely to happen by 2030. “The quantum computing industry crossed an inflection point in 2025,” Forrester analyst Brian Hopkins said in his report. “Vendors moved beyond theoretical fault‑tolerant architectures into early engineering reality.” IBM, for example, has a

Linux 7.0 debuts with some big changes for networking

14 April 2026 @ 1:39 am

The Linux 7.0 kernel is now out, and it’s one of the most impactful releases in years for networking professionals. The Linux kernel is the core of a Linux operating system distribution. Linux is commonly used as a foundation for operating systems in the cloud and as a base for networking. While the 7.0 designation is a big number, Linux creator Linus Torvalds iterates to major version numbers on a somewhat less precise basis, often arbitrarily jumping to a new number after a prior series gets too high.  “We have a new major number purely because I’m easily confused and not good with big numbers,” Torvalds wrote.

Intel: Latest news and insights

13 April 2026 @ 12:00 pm

More processor coverage on Network World:AMD news and insights | Nvidia news and insights Intel is hoping for a turnaround under its new CEO, Lip-BuTan. Intel’s Q1 2025 revenue was $12.7 billion, flat year-over-year. While revenue for its client computing group dropped 8%, the data center and AI segment showed an 8% increase, dr

AI demand is so high, AWS customers are trying to buy out its entire capacity

11 April 2026 @ 12:27 am

The Amazon Web Services (AWS) chip business is “on fire,” Trainium offers better price-performance than Nvidia, and customers are so eager for AI compute capacity that they’re looking to buy up all that’s currently available. These are the takeaways shared by Amazon CEO Andy Jassy in his eight page letter to shareholders in the tech giant’s 2025 annual report.

Intel secures Google cloud and AI infrastructure deal

10 April 2026 @ 7:42 pm

Intel and Google have announced a multi-year collaboration agreement that will see Google will continue to deploy Intel Xeon-based platforms for its next generation of AI and cloud infrastructure. These platforms will use Intel’s upcoming Xeon CPUs and custom infrastructure processing units (IPUs) co-designed by Intel and Google.  In return, Google will continue co-development of the IPUs (referred to as SmartNICs by other firms) which are designed to off

OpenAI puts part of Stargate project on hold over runaway power costs

10 April 2026 @ 3:59 pm

OpenAI has postponed plans to open one of the data centers central to its Stargate project. It announced its plan to open the data center in the UK with great fanfare last September, when it was regarded as a major boost for the country’s nascent AI industry, as well as proving a step up for OpenAI’s international credentials. At the time, Sam Altman, CEO of OpenAI, said, “The UK has been a longstanding pioneer of AI, and is now home to world-class researchers, millions of ChatGPT users, and a government that quickly recognized the potential of this technology.” Al

Broadcom strikes chip deals with Google, Anthropic

10 April 2026 @ 3:51 pm

Broadcom has announced it will produce future versions of artificial intelligence chips for Google, and separately signed an expanded deal with Anthropic to provide about 3.5 gigawatts worth of computing capacity to the AI startup, drawing on Google’s AI processors. The compute capacity comes courtesy of Google’s Tensor Processing Units (TPUs) as well as supplying its own networking components. It will come online in 2027. The deal with Google is a long-term agr

forensicswiki.org

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Computer forensic tools and techniques used by investigators

cyberciti.biz

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online community of new and seasoned Linux / Unix sysadmins.

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heartinternet.co.uk

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Hosting packages for an initial web presence

How to Check for Available Domains

31 March 2026 @ 1:48 pm

The post How to Check for Available Domains appeared first on Heart Internet.

SSL Certificates are changing. Here’s what you need to know.

17 March 2026 @ 10:12 am

The rules around SSL certificates are changing across the whole internet. The good news is that for most customers, very little will change on your side. This is an industry-wide... The post SSL Certificates are changing. Here’s what you need to know. appeared first on Heart Internet.

Hosting VPS Linux vs Windows VPS

9 March 2026 @ 3:03 pm

The post Hosting VPS Linux vs Windows VPS appeared first on Heart Internet.

Domain Name Transfer Checklist: Everything You Need to Know

3 March 2026 @ 2:56 pm

The post Domain Name Transfer Checklist: Everything You Need to Know appeared first on Heart Internet.

Heart Internet Win Gapstars Innovation Award 2026

23 February 2026 @ 11:57 am

We’re incredibly proud to celebrate our Site Reliability Engineering team, who have won the Gapstars Innovation Award for their outstanding work improving platform stability, security, and visibility across our shared... The post Heart Internet Win Gapstars Innovation Award 2026 appeared first on Heart Internet.

A/B Testing Explained: A Practical Guide To Better Results | Part 1

20 February 2026 @ 8:32 am

If you want to improve your website you probably need to do A/B testing, otherwise known as split testing. Instead of guessing, A/B testing allows you to experiment more scientifically.... The post A/B Testing Explained: A Practical Guide To Better Results | Part 1 appeared first on Heart Internet.

How to enable two-factor authentication (2FA) on your Heart Internet account

28 January 2026 @ 12:37 pm

Account security matters, and switching on two-factor authentication (2FA) is a quick win. 2FA adds a second check during the sign-in process, so even if someone compromises your password, they still can’t get in.  To enable 2FA:  Step 1: Open your... The post How to enable two-factor authentication (2FA) on your Heart Internet account appeared first on Heart Internet.

How to Choose the Perfect Domain Name for Your Business

9 July 2025 @ 9:30 am

Get Your Name Right – The Internet Never Forgets Choosing a domain name might sound simple – until you realise it’s the online equivalent of naming your child. No pressure.... The post How to Choose the Perfect Domain Name for Your Business appeared first on Heart Internet.

What is a VPS? And is it Time You Got One?

25 June 2025 @ 9:30 am

Discover what a VPS server is, how VPS hosting works, and why it’s ideal for small businesses. Learn the benefits and explore VPS plans with Heart Internet. The post What is a VPS? And is it Time You Got One? appeared first on Heart Internet.

We’re Now Certified by the Green Web Foundation

11 June 2025 @ 9:30 am

💚 Hosting that works hard, treads lightly.   Big news: Heart Internet is now officially listed with the Green Web Foundation. That means our hosting services are recognised as being... The post We’re Now Certified by the Green Web Foundation appeared first on Heart Internet.

serverfault.com

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Common Server issues – FAQs and answers from those in the know

Docker container Tag issue in Openstack Deployment

13 April 2026 @ 3:06 pm

I'm trying deploy openstack on cluster of VMs running Debian 12.13 bookworm. My globals.yml file configuration is: # under kolla options title: config_strategy: "COPY_ALWAYS" kolla_base_distro: "debian" kolla_base_distro_version: "bookworm" openstack_release: "antelope" # for High Availability purposes, the internal VIP address # belong to same subnet of Management Network, # but not used by any VM or service in kolla_internal_vip_address: "192.168.100.254" # external VIP address belong to same subnet as Router and Server, but not used kolla_external_vip_address: "192.168.1.100" # under: Neutron - Networking Options title: network_interface: "enp2s0" neutron_external_interface: "enp1s0" # use OVN (Open Virtual Network) for modern Routing/Switching in openstack neutron_plugin_agent: "ovn" The issue, Kolla-Ansible fail to pull Docker imag

We are evaluating Intel QAT acceleration for QEMU live migration

13 April 2026 @ 11:11 am

QEMU uses GnuTLS for TLS migration, while Intel QAT TLS acceleration is available via OpenSSL engine/provider. Is there any supported way to enable QAT acceleration for migration TLS today, or does this require modifying QEMU to use OpenSSL instead of GnuTLS?

Debian Bookworm: cron not works

13 April 2026 @ 10:03 am

My cron in Debian Bookworm doesn't work some weeks (maybe from the end of march) - I don't know. And I don't know how to fix it. Logs (/var/log/syslog and /var/log/cron) are empty of cron data. So I tried to find for fix it. I found some articles about enable cron. And cron still not works after these fixes. I don't know what to do else.

AWS Linux iptables redirecting port 22 timeout

13 April 2026 @ 3:17 am

I am trying to run cowrie honeypot on EC2 AWS Linux instance. Instance is accessible through ssh which is by default on port 22. As instructed in https://github.com/cowrie/cowrie/blob/main/INSTALL.rst, changed ssh port to 22222 (5 2s) by editing /etc/ssh/sshd_config. I was able to connect back to instance by specifying port 22222. And then, to make cowrie listen on port 22 I added the rule: sudo iptables -t nat -A PREROUTING -p tcp --dport 22 -j REDIRECT --to-port 2222 After that, closed the session and attempted to connect back to instance but connection timed out. I am very new to this. How should configure this?

how can i add contrib repo to debian via cloud-init?

11 April 2026 @ 10:58 pm

One failure moving our servers from deb12 to 13 was some packages moved to contrib repo. After some time debugging our failed upgrade, turns out cloud-init thinks a missing pacakge is no big deal ¯_(ツ)_/¯ cloud-init.log:2026-04-11 22:28:00,694 - apt.py[DEBUG]: The following packages were not found by APT so APT will not attempt to install them: ['geoipupdate'] tried to update our deployment following their example apt: preserve_sources_list: true sources_list: deb $MIRROR $RELEASE main contrib but that doesn't seem to do absolutely anything. I see that line mentioned in /var/log/cloud-init.log but nothing else happens because of it. Nada changes in /etc/apt/**. And cloud-init continue to ignore th

SCCM client push fails when device is managed by MDM

11 April 2026 @ 3:13 pm

I have a company device that is managed by both SCCM and an MDM solution. When I try to perform a client push installation using SCCM, the operation fails. It seems that the device is fully controlled by the MDM, and SCCM is unable to install or push the client. Has anyone faced this issue before? Is this expected behavior when MDM is managing the device? And is there any workaround to allow SCCM push in this scenario? MDM:airwatch

Internal vs external email server for bulk email delivery [closed]

11 April 2026 @ 10:39 am

I need to send bulk email for a small business application hosted on Ubuntu server. I'm trying to decide between running my own SMTP server (Postfix) or an external email marketing service provider. Problem: Using Postfix locally, many messages either land in spam or do not reach the recipient. I understand this may be related to missing or incorrect SPF, DKIM, reverse DNS configuration, and IP reputation. What I tried: Installed and configured Postfix on Ubuntu Set up basic SMTP authentication Attempted SPF and DKIM configuration Tested sending to Gmail and Outlook accounts Despite this, results are inconsistent. Research: From what I read, many businesses prefer external SMTP or email marketing services companies because they handle infrastructure, IP reputation, and deliverability optimization. Question: In a business environment, is it practical to maintain your own SMTP

Traefik ignores containers with multiple routers?

8 April 2026 @ 4:11 pm

I am fairly new to Traefik, but have managed to set up multiple containers behind it. I am now running into an issue where if I create a container that has more than one router, Traefik doesn't process it. Is this something that should work, or does 3.6 not support it? According to the documentation, this is how I should set up the labels when I have an internal host only route and an external host + prefix route, where I need to strip out the prefix: labels: - "traefik.enable=true" # Local access, host only - "traefik.http.routers.foundry14lan.rule=Host(`vtt.homelab.lan`)" - "traefik.http.routers.foundry14lan.entrypoints=websecure" - "traefik.http.routers.foundry14lan.tls=true" - "traefik.http.services.foundry14lan.loadbalancer.server.port=30000" # External access, https, with path that needs to be stripped - "traefik.http.routers.foundry14web.rule=Host(<redacted>) && PathPref

Cannot add security group to "Remote Desktop Users" permission denied even as Domain Admin

24 March 2026 @ 9:37 am

Environment: Windows Server 2022, single Active Directory domain (e.g. MY.DOMAIN), no Azure AD. Problem: I have a security group called RDP (in MY.DOMAIN/DOMAIN). When I add it to the built-in Remote Desktop Users group, the following error occurs: "You do not have permission to modify the group MY.DOMAIN/Builtin/Remote Desktop Users." What I tried: Adding the group using AD Users and Computers Running PowerShell with Add-ADGroupMember Logging on using user principal name Question: What is the minimum permission required to modify a Builtin group in Active Directory? Is Domain Admins membership required, or can this be delegated? Is there an alternative approach such as Group Policy to grant RDP access through a custom security group without touching Builtin\Remote Desktop Users directly?

Time zone issues with Microsoft 365

7 July 2025 @ 5:41 pm

We recently switched to Microsoft Office 365 and also use Active Directory on a local Primary Domain controller, that syncs with MS365 via Azure AD Synchronization Service. We are experiencing issues with Calendar events winding up in what seems like different time zones after being sent. Example: A manager sent an invite for 9 am, and the meeting shows 6 am on the recipient calendar. When we check the users accounts and machines they are in fact in the same time zones. If anyone has experience with this issue please respond. It may have nothing to do with the AD sync but I though it was worth mentioning.

poundhost.com

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Cheap dedicated server hosting

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