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.

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Amazons’s cloud computing & web hosting service.

Amazon EC2 X8i instances are now available in additional regions

26 May 2026 @ 9:58 pm

Starting today, Amazon Elastic Compute Cloud (Amazon EC2) X8i instances are available in the Asia Pacific (Singapore), Asia Pacific (Sydney) and AWS GovCloud (US-West) regions. These instances are 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 ba

Amazon RDS now supports ENA Express for Multi-AZ replication

26 May 2026 @ 7:00 pm

Amazon RDS Multi-AZ instances now use ENA Express for replication traffic between Availability Zones. ENA Express uses AWS's Scalable Reliable Datagram (SRD) protocol to optimize network performance by delivering up to 25 Gbps single-flow bandwidth for cross-AZ replication traffic leveraging advanced congestion control and multi-pathing capabilities, and reducing latency variability for Multi-AZ deployments. RDS Multi-AZ instances replicate data synchronously to a standby in a different Availability Zone to provide high availability and automatic failover. AWS SRD, used by ENA Express, improves replication by dynamically distributing traffic across multiple network paths and adapting to congestion in real time. Amazon RDS Multi-AZ with ENA Express delivers increased write throughput and lower write latencies for write-intensive database workloads. ENA Express for Amazon RDS is avail

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

26 May 2026 @ 4:00 pm

Starting today, Amazon Elastic Compute Cloud (Amazon EC2) R8i and R8i-flex instances are available in the AWS GovCloud (US-East) 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 EC2 M8i and M8i-flex instances are now available in AWS GovCloud (US-East) Region

26 May 2026 @ 4:00 pm

Starting today, Amazon EC2 M8i and M8i-flex instances are now available in AWS GovCloud (US-East) 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

Amazon VPC IPAM now supports tags on IPAM pool allocations

26 May 2026 @ 1:00 pm

Amazon VPC IP Address Manager (IPAM) now supports tags on IPAM pool allocations, enabling customers to organize, govern, and control access to individual IP address allocations using the same tagging workflows they use across other AWS resources. Amazon VPC IP Address Manager (IPAM) helps customers plan, track, and monitor IP addresses across their AWS environments. With this launch, customers can tag allocations at creation time or add tags to existing allocations. These tags can be referenced in AWS Identity and Access Management and Service Control Policies, enabling centralized governance over IP address usage at scale. For example, a network administrator can tag allocations by environment and enforce an IAM policy that allows only the production networking role to allocate from the pool, while development teams are restricted to development pools. Customers can also search and filter allocations by tag across all IPAM pools, making it faster to locate specific IP addre

Amazon GuardDuty Malware Protection for AWS Backup supports Amazon S3 continuous backups

26 May 2026 @ 10:00 am

Amazon GuardDuty Malware Protection for AWS Backup is now available for Amazon S3 continuous backups. You can now scan your S3 continuous backups for malware and identify clean points in time across your entire backup timeline for safe recovery. You can enable full or incremental malware scans for S3 continuous backups within your backup plan, and run on-demand scans up to any restorable point in time. You can now query the malware scan status at any point in time within your continuous backup using the new GetPITRMalwareScanResults API, allowing you to verify whether a specific recovery time is clean before initiating a restore. Support for S3 continuous backups is available in all AWS Regions where Amazon GuardDuty Malware Protection for AWS Backup is supported. You can get started using the AWS Backup console, API, or CLI. To learn more, visit the

Amazon SageMaker Unified Studio adds interactive interface for managing Feature Store in IAM Domains

22 May 2026 @ 8:07 pm

Amazon SageMaker Unified Studio IAM domains now includes an interactive interface for creating and managing feature groups in SageMaker Feature Store, eliminating the need to write code for common feature management tasks. This launch makes feature management accessible to data scientists, ML engineers, and business analysts from a single collaborative environment. Features are the inputs to ML models used during training and inference. For example, a music recommendation app might use features like song ratings, listening duration, and listener demographics to personalize which songs are suggested to each user. With this interactive interface for creating and managing features, you can now discover and search existing features, create and modify feature groups, view definitions and schemas, monitor data ingestion status - all without writing API calls. Features created elsewhere appear immediately in SageMaker Unified Studio when sharing the same IAM role, ensuring seamless

Amazon SageMaker expands domain management across domain types

22 May 2026 @ 7:30 pm

Amazon SageMaker Unified Studio now provides domain management experience for Identity Center and IAM-based domains outside of AWS console, allows administrators and data management teams to create and manage projects, configure workforce identity, manage users and permissions, and set networking properties for projects. Previously, this was only available for IAM based domains. With this launch, administrators of Identity Center-based domains can access domain management capabilities in SageMaker Unified Studio portal to create projects with configurable execution roles that define which AWS analytics, AI, and ML services the project can access. VPC configuration is consistent across both domain types, inherited by all projects, and can be edited to change the VPC, subnets, or security group. Administrators can also manage associated accounts, enabling users to publish and consume data from other AWS accounts within SageMaker Unified Studio. These features are ava

New agentic migration assessment capabilities now available with AWS Transform

22 May 2026 @ 6:58 pm

AWS Transform now offers advanced migration assessment capabilities including what-if scenarios, customizable assumptions, flexible file format support, and multiple new total cost of ownership (TCO) assessment features. These latest features let you quickly build a migration business case and accelerate your migration decisions. You can start your migration assessment with whatever data you have including RVTools exports, CMDB data, exports from the AWS Transform discovery tool, and a wide variety of third-party discovery tools. Create what-if scenarios for your migrations with customized assumptions including region, resource utilization, and service mapping. You can also compare scenarios and find the best path for your AWS migration. This latest release lets you include multiple analyses in your what-if scenarios including cost modelling of EC2, FSx, S3, SQL Server on EC2, and virtual desktops. On top of this, you can enhance your assessment with the inclusion of additi

Amazon SageMaker adds business metadata and governance in IAM-based domains

22 May 2026 @ 6:24 pm

Amazon SageMaker Unified Studio now supports business context, metadata and data governance capabilities in IAM-based domains. With this launch, customers using Amazon SageMaker IAM-based domains can add business context to their AWS Glue Data Catalog tables, including business names, descriptions, and README documentation. They can use AI-generated metadata to produce business names and descriptions automatically, reducing the effort of cataloging large numbers of tables. Customers can also create business glossaries so that teams across the organization use consistent definitions for terms like "ARR" or "churn rate," and define metadata form templates to capture structured attributes such as data classification, retention policies, or ownership details. With this business context in place, data engineers, analysts, and data scientists can search for and discover tables across the entire domain, filter results b

networkworld.com

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Information, intelligence and insight for Network and IT Executives.

Zero trust isn’t broken, but most companies are doing it wrong

27 May 2026 @ 4:23 pm

Zero trust is 15 years old, and like many teenagers, it can feel misunderstood and underappreciated. The concept of zero trust was first defined by John Kindervag, a Forrester analyst at the time, as a strategy to replace the outmoded perimeter security model with a “never trust, always verify” approach. But going from principle to practice isn’t easy. Accenture reports that 88% of organizations have encountered significant challeng

As AI datacenter memory becomes hot commodity, SK Hynix makes it cooler

27 May 2026 @ 4:04 pm

South Korean semiconductor giant SK Hynix has announced a new type of high-bandwidth memory (HBM) for AI datacenters that improves heat dissipation by integrating a cooling layer within the memory package itself. The change could allow AI processors incorporating the new memory to run faster, or reduce cooling costs. Traditional chip cooling architectures are largely external; heat dissipation happens after it leaves the package. For the HBM memory used by AI, which vertically stacks memory chips on top of one another to improve latency and memory dens

Cisco research finds standard AI safety benchmarks miss the real threat

27 May 2026 @ 1:05 pm

Enterprises deploying closed AI models have generally relied on published safety benchmarks to assess risk before procurement and deployment decisions. New research from Cisco’s AI Threat Intelligence and Security Research team finds those benchmarks may systematically understate the threat. Standard safety tests submit a single adversarial prompt and record the model’s response. Multi-turn attacks work differently. An attacker maintains a conversation across multiple exchanges, iterating and adapting based on each response until the model yields. The report pair

Cisco redefines ‘job-ready’ for network engineers with its certification overhaul

26 May 2026 @ 5:00 pm

Cisco is revamping its flagship Cisco Certified Network Associate (CCNA) certification for the first time in seven years, adding a new AI literacy pillar, more hands-on lab requirements, and a security-first mindset to a credential held by more than 1.8 million professionals worldwide. It’s also adding a new AI-focused module to the expert-level Cisco Certified Internetwork Expert (CCIE) practical exam. The changes represent

2026 network outage report and internet health check

26 May 2026 @ 4:16 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,

IBM plans $2B quantum chip foundry; government will pay half

22 May 2026 @ 5:29 pm

The US government has awarded IBM $1 billion to help establish the first purpose-built quantum chip fabrication unit in the US. The Trump administration’s investment is being matched by IBM itself and will result in the establishment of a new company called Anderon. The new business will build its factory in Albany, New York. IBM has pioneered quantum computing for decades. “Our work in silicon wafer fabrication has been a key to IBM’s success and will

Cisco: AI traffic is radically reshaping WANs

22 May 2026 @ 2:43 pm

AI agents generate up to 450% more network traffic than humans can, and they’re beginning to reshape network traffic patterns in measurable ways. Enterprise network traffic without agentic AI is expected to grow 2.5x in the next decade — agentic AI adoption will push that growth to 9x compared to current traffic levels, driven by autonomous task execution and inference-heavy workflows, according to new research from Cisco. Cisco’s new study, AI Impact on Wide Area Networks 2026, finds AI and agentic AI will not only increa

xAI-Anthropic deal signals the rise of AI compute as a standalone business

22 May 2026 @ 8:47 am

New SpaceX IPO filings suggest frontier AI firms are beginning to treat compute infrastructure as a standalone commercial business, with Elon Musk’s xAI agreeing to provide large-scale AI capacity to competitor Anthropic. The filing disclosed that Anthropic agreed to purchase compute services delivered through xAI’s Colossus and Colossus II AI infrastructure clusters through May 2029 under an agreement valued at roughly $1.25 billion per month. The arrangement is notable because Anthropic competes directly with xAI in the market for frontier AI models and enterprise AI services, suggesting at least some AI developers are increasingly willing to buy large-scale compute capa

Critical vulnerability in Cisco Secure Workload rated at maximum severity

21 May 2026 @ 10:43 pm

A critical vulnerability in the on-premises version of the Cisco Secure Workload security platform could allow a threat actor to obtain the privileges of a site admin, enabling them to compromise endpoints and read or modify configuration data. “CSOs need to drop what they are doing and patch this immediately,” warned consultant Robert Enderle, who heads the Enderle Group. “Cisco Secure Workload manages zero trust, micro-segmentation, and enterprise-wide network visibility. If an attacker controls the platform that dictates your security policies, they effectively own the map and

Cisco’s new certs are a wake-up call for AI-era network engineers

21 May 2026 @ 6:55 pm

Cisco is reshaping its certification portfolio to reflect an AI-first world, with major updates to CCNA and CCIE that explicitly bake AI, automation, and “human skills” into the learning path. These changes matter not only as exam tweaks but also as a signal of how the role of the network, and the people who run it, is changing in the AI era. What Cisco is changing Cisco is rolling out AI-drive

forensicswiki.org

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Computer forensic tools and techniques used by investigators

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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

Sustainable Data Centres: How to Cut Carbon without Sacrificing Performance

27 May 2026 @ 12:55 pm

No matter if it is a website visit or file uploaded, all these actions run through a hall of servers that consume electricity 24/7. Data centres account for a slice... The post Sustainable Data Centres: How to Cut Carbon without Sacrificing Performance appeared first on Heart Internet.

How to Register a Domain Name in the UK

26 May 2026 @ 10:04 am

A Complete Guide for 2026 Your domain name is your address on the internet. It’s how customers find you, how your email works, and it’s often the first impression a... The post How to Register a Domain Name in the UK appeared first on Heart Internet.

What we’ve been doing to improve the reseller experience

18 May 2026 @ 10:53 am

A lot has been changing at Heart Internet, with major improvements across our platform, products, security, infrastructure and support. We’ve completed a major transition to fully independent operations, launched new... The post What we’ve been doing to improve the reseller experience appeared first on Heart Internet.

Unique Domain Extensions You Might Not Have Heard Of

15 May 2026 @ 10:30 am

The post Unique Domain Extensions You Might Not Have Heard Of appeared first on Heart Internet.

Business Email and Website Hosting

8 May 2026 @ 10:30 am

The post Business Email and Website Hosting appeared first on Heart Internet.

What Is the Future of the Internet?

1 May 2026 @ 10:30 am

The post What Is the Future of the Internet? appeared first on Heart Internet.

Copy Fail Linux Vulnerability (CVE-2026-31431)

30 April 2026 @ 2:43 pm

On 29 April 2026, security researchers at Theori (Xint Code) publicly disclosed CVE-2026-31431, known as “Copy Fail.” It is a local privilege escalation flaw in the Linux kernel’s AF_ALG cryptographic... The post Copy Fail Linux Vulnerability (CVE-2026-31431) appeared first on Heart Internet.

How to Reduce the Bounce Rate of Your WordPress Site

24 April 2026 @ 10:30 am

The post How to Reduce the Bounce Rate of Your WordPress Site appeared first on Heart Internet.

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.

serverfault.com

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

Intermittent 10–15 second delay before logon in domain environment

27 May 2026 @ 2:49 pm

I am troubleshooting a Windows domain logon delay affecting client workstations. Symptoms About 10–15 second delay before the login screen appears NETLOGON Event ID 5719 during startup GroupPolicy events 1058 / 1129 / 1503 observed When enabling “Always wait for the network at start-up and logon”, the pre-logon delay disappears, but the delay shifts to post-login (desktop loading becomes slower) Environment Windows domain environment Multiple Domain Controllers Domain connectivity and SYSVOL access tested: Ping: ~1–5 ms SYSVOL access: <100 ms Issue occurs both on Wi‑Fi and wired connection Is this behavior expected in environments with multiple GPOs (due to synchronous vs asynchronous processing), or is there still an underlying issue that could be optimized?

Apache2: Virtual hosts (htttp, https) and Directory directive

27 May 2026 @ 12:40 pm

We have a legacy server that needs updating. During this process I noticed some peculiar bevahior. Again this thing is ancient and internal only. It was http-only but some new part required https so I do have a certificate now and ssl setup. There are 2 virtual host: for port 443 and 80. Now the strange thing is one of the legacy websites using a Directory directive and only configured in the port 80 (http) virtual host works just fine on https even though it is not configured in that virtual host. How is this possible?

How to create an item or something similar in Zabbix where i can read the service being run by an specific host?

27 May 2026 @ 11:44 am

In my company they have a Zabbix with more than 500 hosts. They are behind bastions and more. The point for access is only through the Zabbix API. I need a list of the services running and their versions, for each host, service agnostic. There are templates for Windows and Linux separated. I asked the senior sysadmin and they have podman containers and also some virtual machines. How can a configuration be made for an Item of the template to return this? They suggested that I look into Hosts inventory but I don't see how that solves the problem.

ApacheDS change entry of prescriptiveACI disconnects server

27 May 2026 @ 9:14 am

I have setup a clean ApacheDS on Ubuntu. I use the "dc=example,dc=com" to test some ACI. The entry already exists as I have created it via Directory Studio. Therefore changetype: modify. #!RESULT ERROR #!CONNECTION ldap://192.168.2.200:389 #!DATE 2026-05-27T11:04:56.489 #!ERROR PROTOCOL_ERROR: The server will disconnect! dn: cn=enableSearchForAllUsers,dc=example,dc=com changetype: modify objectClass: top objectClass: subentry objectClass: accessControlSubentry cn: enableSearchForAllUsers subtreeSpecification: { base "dc=example,dc=com" } prescriptiveACI: { identificationTag "Searchers", precedence 0, authenticationLevel simple, itemOrUserFirst userFirst: { userClasses { allUsers }, userPermissions: { { protectedItems: { entry, allUserAttributeTypesAndValues }, grantsAndDenials: { grantRead, grantBrowse, grantReturnDN }

How to allow ssh login using sssd when user belongs to both groups?

27 May 2026 @ 6:19 am

We have FreeIPA server holding all the users and groups. And there are a lot of Debian clients to it (by using freeipa-client package). This sets up sssd service. We have multiple teams working on multiple products and a semi-automated way of giving production access on request. Previously there was a single team setup, and we had this in sssd.conf for production servers: simple_allow_groups = allow-production Users had to request being added to group, where they would be removed automatically when request expires. Now we want to add a separation by product, so that users not belonging to a particular product, would not interfere even if they had been issued production access. We tried this: simple_allow_groups = allow-production,product-a However, this allows login if user belongs to one or the other group. How can I make this an "and" condition, allowing l

Software RAID-1 using NVMe drives on multi-socket system: split the drives or share a CPU?

27 May 2026 @ 2:40 am

I'm getting ready to put together a new server with bcache (Linux) to speed up a SAS RAID-5 array. I'll be using cheap NVMe drives as the cache media, with an LSI controller hosting some large spinners as the backing store. Key information 1: This will be on a multi-socket system. Key information 2: The NVMe drives (two of them) will be mirrored into a single RAID-1 array in software using the kernel's MD facilities. Two of the front NVMe-capable drive bays are assigned to {i.e. have PCIe lanes to} CPU0, and two more are assigned to CPU1. My question is: Should I take care to place the NVMe drives such that they are split across the two CPUs, or should I make sure they are assigned to the same CPU? I don't know how the underlying RAID logic in the Linux kernel works, and even less so how low-level I/O works in a modern QPI-based (or UPI-based) system. But it seems to me that one of these approaches should be much preferred over the other (from a system perfor

Apache server behind reverse proxy redirecting incorrectly

26 May 2026 @ 7:54 pm

Let's say I have a reverse proxy server (proxy) and a backend server actually handling the traffic (backend). I use a reverse SSH tunnel to send the traffic to the backend server. So I setup the proxy server like this: ProxyPass "/" "http://localhost:8080/" ProxyPassReverse "/" "http://localhost:8080/" I enabled the correct Apache modules, and all was good. However, I noticed an issue. If I specified a redirect like so: Redirect permanent /index.html /w/index.php Accessing the backend server without the proxy causes the redirect to work correctly (e.g. http://backend redirects to http://backend/w/index.php), but accessing it through the proxy server causes it to redirect to http://localhost/w/index.php instead, which shouldn't be happening. My SSH tunnel runs on the backend server, and

.de domain shows "active" in RDAP but TLD registry return NXDOMAIN

26 May 2026 @ 3:43 pm

I am having an issue with a .de domain genieglobal-workforce.de registered through GoDaddy. My nameservers are hosted on DigitalOcean. The domain appears completely valid and active in the registry's RDAP database, but the actual .de zone file does not contain my domain, resulting in an NXDOMAIN from the TLD root servers. It has been several hours since the last update. I have verified that My DigitalOcean zone file is fully configured with valid $ORIGIN, $TTL, SOA, NS, and A records and there is no DNSSEC issue either. So what is the problem? whois command say the domain is active Domain: genieglobal-workforce.de Status: connect Querying the DENIC RDAP shows the status as active and correctly lists my DO nameservers: { "rdapConformanc

How to upload files that contain special characters/non english using curl in Powershell? [migrated]

26 May 2026 @ 2:41 am

I'm trying to upload a file that contain special characters & non-english letters using curl in Powershell but it's unable to read/open the file. Error gives this: curl: (26) Failed to open/read local data from file/application The command I used is this: [Console]::OutputEncoding = [System.Text.Encoding]::UTF8; $OutputEncoding = [System.Text.Encoding]::UTF8; curl.exe -F "sess_id=xxxxxx" -F "utype=prem" -F "to_folder=28890" -F "file_0=@C:\Users\Administrator\Desktop\OST\Complete\[2026.05.25] 学園アイドルマスター 初星学園 Remix Album「ReCollection」vol.1 [FLAC 48kHz/24bit].zip" "https://d300.userdrive.org/cgi-bin/upload.cgi?upload_type=file&utype=anon" I tested this by renaming the file so the path does exist it just can't read special characters. Is there any fix for this?

NginX: How can I deny an IP address on the server level for subdomains?

25 May 2026 @ 6:47 pm

I have a website for a domain which should be reachable from all IP addresses. But I would like to block some IP addresses from all subdomains. Therefore I created two server blocks. One handles all requests going to www.example.com or example.com. The other handles all requests going to all subdomains. The correct server block gets selected. When I insert deny all; and allow all; in the server blocks, always the option specified in the default server block gets used. In the example below, all connections of the domains www.example.com, example.com, and the subdomains get denied. Even if the domains www.example.com and example.com allow access. stream { map $ssl_preread_se

poundhost.com

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Cheap dedicated server hosting

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