Match linux command-line arguments to view their help text.
Tag: SysAdmin
system administrator related links
stackshare.io
Dev / Production stacks for all to see. Handy tool to see what software is trending today.
aws.amazon.com
Amazons’s cloud computing & web hosting service.
AWS announces Flexible Cost Allocation in AWS GovCloud (US)
2 February 2026 @ 5:40 pm
AWS Network Firewall now supports flexible cost allocation through AWS Transit Gateway native attachments in AWS GovCloud (US) Regions, enabling you to automatically distribute data processing costs across different AWS accounts. Customers can create metering policies to apply data processing charges based on their organization's chargeback requirements instead of consolidating all expenses in the firewall owner account. This capability helps security and network teams better manage centralized firewall costs by distributing charges to application teams based on actual usage. Organizations can now maintain centralized security controls while automatically allocating inspection costs to the appropriate business units or application owners, eliminating the need for custom cost management solutions. Flexible cos
Amazon Connect now provides APIs to test and simulate voice interactions
2 February 2026 @ 4:30 pm
Amazon Connect now offers APIs to configure and run tests that simulate contact center experiences, making it easy to validate workflows, self-service voice interactions, and their outcomes. With these APIs, you can programmatically configure test parameters, including the caller's phone number or customer profile, the reason for the call (such as "I need to check my order status"), the expected responses (such as "Your request has been processed"), and business conditions like after-hours scenarios or full call queues. With this launch, you can also integrate testing directly into CI/CD pipelines, run multiple tests simultaneously to validate workflows at scale, and enable automated regression testing as part of your deployment cycles. These capabilities allow you to rapidly validate changes to your workflows and confidently deploy new customer experiences to production.
To learn more about these features, see the
AWS HealthImaging adds JPEG XL support
2 February 2026 @ 4:29 pm
AWS HealthImaging now supports storing and retrieving lossy compressed medical images in the JPEG XL transfer syntax (1.2.840.10008.1.2.4.112). It is now simpler than ever to integrate HealthImaging with applications that require JPEG XL encoded DICOM data, such as digital pathology whole slide imaging systems.
With this launch, HealthImaging stores your JPEG XL Lossy image data without transcoding, which maintains the fidelity of your data and reduces your storage costs. Further, you can retrieve stored image frames in the JPEG XL format without the latency of transcoding at retrieval time.
Amazon RDS now supports IPv6 for VPC endpoints of RDS Service APIs
30 January 2026 @ 8:55 pm
Amazon RDS now supports Internet Protocol version 6 (IPv6) for VPC endpoints of RDS Service APIs, in addition to the existing IPv6 support for public endpoints. This allows you to configure dual-stack (IPv4 and IPv6) connectivity to access RDS Service APIs directly from within your VPC without internet traversal. IPv6 provides an expanded address space, enabling you to scale your application on AWS beyond the limitations of IPv4 addresses. With IPv6, you can assign easy to manage contiguous IP ranges to micro-services and can get virtually unlimited scale for your applications. Moreover, with support for both IPv4 and IPv6, you can gradually transition applications from IPv4 to IPv6, enabling safer migration. This feature is available in all commercial AWS regions and AWS GovCloud (US) regions. Get started with
Amazon Connect launches improved wait time estimates
30 January 2026 @ 7:40 pm
Amazon Connect now delivers improved estimated wait time metrics for queues and enqueued contacts, empowering organizations. This allows contact centers to set accurate customer expectations, provide convenient options such as callbacks when hold times are extended, and balance workloads effectively across multiple queues. By leveraging the improved estimated wait time metrics, contact centers can make more strategic routing choices across queues while gaining enhanced visibility for better resource planning. For example, a customer calling about billing during peak hours with a 15-minute wait is seamlessly transferred to a cross-trained team with 2-minute availability, getting help faster without repeating their issue. The metric works seamlessly with routing criteria and agent proficiency configurations.
Amazon SageMaker Unified Studio now supports AWS PrivateLink
30 January 2026 @ 7:08 pm
Today, Amazon SageMaker announced a new capability allowing you to establish connectivity between your Amazon Virtual Private Cloud (VPC) and Amazon SageMaker Unified Studio without customer data traffic going through the public internet. Customers needing to go beyond the standard data transfer protocol (HTTPS/TLS2) can choose to configure their VPC so data transfer stays within the AWS network. Through AWS PrivateLink, Network Administrators can now onboard AWS service endpoints to their VPC used by Amazon SageMaker Unified Studio. With the endpoints are onboarded, IAM policies used by Amazon SageMaker will enforce that customer data stay within the AWS network. Amazon SageMaker private access using AWS PrivateLink is available in all AWS Regions where Amazon SageMaker Unified Stu
AWS Lambda launches enhanced observability for Kafka event source mappings
30 January 2026 @ 6:00 pm
AWS Lambda launches enhanced observability for Kafka event source mappings (ESM) that provides Amazon CloudWatch Logs and metrics to monitor event polling setup, scaling, and processing state of Kafka events. This capability allows customers to quickly diagnose setup issues and take timely corrective actions to operate resilient data streaming workloads. This capability is available for both Amazon Managed Streaming for Apache Kafka (Amazon MSK) and self-managed Apache Kafka (SMK) event source mappings. Customers use Kafka event source mappings (ESM) with their Lambda functions to build mission-critical applications. However, the lack of visibility into event polling setup, scaling, and processing state for events slows down troubleshooting for issues resulting from faulty permissions, misconfiguration, or function errors, which increases mean time to resolution and adds operational overhead. With this launch, customers can enable CloudWatch Logs an
Amazon ECS now publishes container health status as a CloudWatch metric
30 January 2026 @ 6:00 pm
Amazon Elastic Container Service (Amazon ECS) now publishes container health status as a new metric in CloudWatch Container Insights with enhanced observability. Customers can now track the operational health of their containers through a dedicated CloudWatch metric and create alarms to respond proactively to unhealthy containers. When customers configure a container health check in the container definition of an ECS task definition, Container Insights now publishes the UnHealthyContainerHealthStatus metric in the ECS/ContainerInsights namespace. The metric reports 0 for HEALTHY and 1 for UNHEALTHY. Container health state information is also available in embedded metric format (EMF) logs, providing additional context while health checks are being evaluated during the UNKNOWN state. The metric is available across cluster, service, task, and container-level dimensions, enabling customers to monitor health at their pref
New Partner Revenue Measurement gives visibility into AWS service consumption
30 January 2026 @ 5:05 pm
Today, AWS announces the launch of Partner Revenue Measurement, a new capability that gives AWS Partners visibility into how their solutions impact AWS service consumption across partner-managed and customer-managed accounts.
Partner Revenue Measurement allows Partners to better understand their AWS revenue impact and product consumption patterns. Partners can now tag AWS resources using the product code from their AWS Marketplace listing with tag key: aws-apn-id and tag value: pc:<AWS Marketplace product-code> to quantify and measure the AWS revenue impact of that solution.
Partner Revenue Measurement is generally available in all commercial regions. To learn more about implementing Partner Revenue Measurement, review the onboarding guide for more information.
Amazon RDS for Oracle now supports cross-Region replicas with additional storage volumes
30 January 2026 @ 4:00 pm
Amazon RDS for Oracle now supports cross-Region replicas with additional storage volumes. With additional storage volumes, customers can add up to three storage volumes, each with up to 64 TiB, in addition to the primary storage volume for their database instance. As a result, customers get flexibility to add or remove storage with evolving workload demands, without incurring application downtime, and set up their database instance with up to 256 TiB storage. Now, with support for cross-Region replicas, customers that set up database instances with cross-Region replicas for business-critical applications also get the benefit of using additional storage volumes for storage flexibility. When you create a cross-Region replica for a database instance that is set up with additional storage volumes, Amazon RDS for Oracle automatically configures the same storage layout on the replica. Subsequently, you can apply changes to addition
networkworld.com
Information, intelligence and insight for Network and IT Executives.
Eying AI factories, Nvidia buys bigger stake in CoreWeave
2 February 2026 @ 5:09 pm
Nvidia continues to throw its sizable bank account around, this time making a $2 billion investment in GPU cloud service provider CoreWeave.
The company says the investment reflects Nvidia’s “confidence in CoreWeave’s business, team and growth strategy as a cloud platform built on Nvidia infrastructure.”
CoreWeave is not the only company that has built its business on Nvidia infrastructure: so has Amazon, Microsoft, Google, Oracle, and dedicated GPU CSPs like Lambda Labs, Crusoe, and RunPod.
Before the deal was even struck Nvidia owned
AI, security tailwinds signal promising 2026 for Cisco
2 February 2026 @ 3:46 pm
In many ways, 2025 was the year Cisco got its product strategy right under the leadership of its chief product officer, Jeetu Patel. Splunk assimilation took hold, and we saw integrations with security, observability, networking and more. In addition, the core of Cisco’s product line—campus networking—underwent a major refresh with new Catalyst Smart Switches and Wi-Fi 7 access points. And after having made bold predictions
Quantum computing is getting closer, but quantum-proof encryption remains elusive
2 February 2026 @ 10:00 am
Quantum-safe encryption is needed now, even though large-scale quantum computers are still at least a few years away.
According to the Government Accountability Office, large quantum computers that will be able to break today’s encryption standards are 10 to 20 years away. But the threat is there already, since adversaries can vacuum up encrypted data in hopes of reading when quantum decryption arrives, in what’s known as “harvest-now decrypt-later” attacks.
“Harvest-now, decrypt-later is definitely a risk that is here,” says
Startup Amutable plotting Linux security overhaul to counter hacking threats
30 January 2026 @ 8:24 pm
If there’s one thing guaranteed to grab attention in the computer security world, it’s announcing yourself without fully explaining what it is you plan to do.
This week, the Linux world got a taste of this enigmatic marketing ploy with the launch out of stealth of Berlin-based Linux security outfit Amutable.
While its purpose is only vaguely defined in the launch announcement, nobody could accuse it of lacking ambition: it plans to bring “determinism and verifiable integrity to Linux systems” to address the operating system’s security weaknesses.
Most tiny
Forward Networks launches agentic AI system built on network digital twin
30 January 2026 @ 6:32 pm
Network operations teams face a flood of AI-powered tools promising simplified management through natural language interfaces. Many amount to conversational wrappers around existing capabilities, offering convenience but not fundamental changes to how networks are managed and verified. That’s what Forward Networks’ first AI tool, called AI Assist, provided when it launched in 2024.
Now in 2026, Forward Networks is taking a different approach with an agentic AI system that goes beyond a conversational interface. Rather than simply answering questions, it d
Oracle may slash up to 30,000 jobs to fund AI data-center expansion as US banks retreat
30 January 2026 @ 5:38 pm
Oracle is considering cutting 20,000 to 30,000 jobs and selling some of its activities as US banks pull back from financing the company’s AI data-center expansion, according to investment bank TD Cowen.
The job cuts would free up $8 billion to $10 billion in cash flow, TD Cowen said in a research report seen by CIO. Oracle is also weighing a sale of its health-care software unit, Cerner, which it acquired for $28.3 billion in 2022.
The measures come as multiple US banks have pulled back from Oracle-linked data-center project lending. “Both equity and debt investors have raise
Cisco: Latest news and insights
30 January 2026 @ 4:38 pm
Cisco (Nasdaq:CSCO) is the dominant vendor in enterprise networking, and under CEO Chuck Robbins, it continues to shake things up.
Cisco is focusing on strategic AI initiatives and partnerships across various regions to build and power AI data centers and ecosystems. This includes collaborations with major players like BlackRock, Global Infrastructure Partners, Microsoft and Nvidia to drive investment and scale AI infrastructure.
The networking giant continue
Top 11 network outages and application failures of 2025
30 January 2026 @ 2:25 pm
System outages plagued organizations of all sizes in 2025, with major incidents exposing vulnerabilities across network infrastructure and the IT dependencies that define today’s distributed environments, according to the latest Internet outage report from Cisco ThousandEyes.
The network intelligence vendor’s recap of the most impactful outages highlights key trends, including the frequency of backend configuration changes causing
Cisco adds intelligent policy enforcement to mesh firewall family
29 January 2026 @ 10:03 pm
Cisco next month will deliver a core piece of its security management framework that is aimed at helping customers more effectively create and manage protection policies.
Specifically, Cisco is adding the Mesh Policy Engine — which it first talked about the Cisco Live event last
forensicswiki.org
Computer forensic tools and techniques used by investigators
cyberciti.biz
online community of new and seasoned Linux / Unix sysadmins.
Download of the day: GIMP 3.0 is FINALLY Here!
18 March 2025 @ 3:45 am
Wow! After years of hard work and countless commits, we have finally reached a huge milestone: GIMP 3.0 is officially released! I am excited as I write this and can't wait to share some incredible new features and improvements in this release. GIMP 2.10 was released in 2018, and the first development version of GIMP 3.0 came out in 2020. GIMP 3.0 released on 16/March/2025. Let us explore how to download and install GIMP 3.0, as well as the new features in this version.
Love this? sudo share_on: Twitter - Facebook -
How to list upgradeable packages on FreeBSD using pkg
16 March 2025 @ 8:25 pm
Here is a quick list of all upgradeable packages on FreeBSD using pkg command. This is equivalent to apt list --upgradable command on my Debian or Ubuntu Linux system.
Love this? sudo share_on: Twitter - Ubuntu to Explore Rust-Based “uutils” as Potential GNU Core Utilities Replacement
16 March 2025 @ 12:17 pm
In a move that has sparked significant discussion within the Ubuntu Linux fan-base and community, Canonical, the company behind Ubuntu, has announced its intention to explore the potential replacement of GNU Core Utilities with the Rust-based "uutils" project. They plan to introduce new changes in Ubuntu Linux 25.10, eventually changing it to Ubuntu version 26.04 LTS release in 2026 as Ubuntu is testing Rust 'uutils' to overhaul its core utilities potentially. Let us find out the pros and cons and what this means for you as an Ubuntu Linux user, IT pro, or developer.
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How to install KSH on FreeBSD
3 March 2025 @ 11:50 pm
Installing KSH (KornShell) on FreeBSD can be done with either FreeBSD ports or the pkg command. The ports collection will download the KSH source code, compile it, and install it on the system. The pkg method is easier, and it will download a pre-compiled binary package. Hence, it is recommended for all users. KornShell (KSH) has a long history, and many older Unix systems and scripts rely on it. As a result, KSH remains relevant for maintaining and supporting legacy infrastructure. Large enterprises, especially those with established Unix-based systems, continue to use KSH for scripting and system administration tasks. Some industries where KSLinux Sed Tutorial: Learn Text Editing with Syntax & Examples
3 March 2025 @ 9:47 am
Sed is an acronym for "stream editor." A stream refers to a source or destination for bytes. In other words, sed can read its input from standard input (stdin), apply the specified edits to the stream, and automatically output the results to standard output (stdout). Sed syntax allows an input file to be specified on the command line. However, the syntax does not directly support output file specification; this can be achieved through output redirection or editing files in place while making a backup of the original copy optionally. Sed is one of the most powerful tools on Linux and Unix-like systems. Learning it is worthwhile, so in tHow to tell if FreeBSD needs a Reboot using kernel version check
23 February 2025 @ 10:07 pm
Keeping your FreeBSD server or workstation updated is crucial for security and stability. However, after applying updates, especially kernel updates, you might wonder, "Do I need to reboot my system?" Let's simplify this process and provide a straightforward method for determining whether a reboot is necessary using the CLI, shell script, and ansible playbook.
Love this? sudo share_on: TwitterCritical Rsync Vulnerability Requires Immediate Patching on Linux and Unix systems
15 January 2025 @ 6:04 pm
Rsync is a opensource command-line tool in Linux, macOS, *BSD and Unix-like systems that synchronizes files and directories. It is a popular tool for sending or receiving files, making backups, or setting up mirrors. It minimizes data copied by transferring only the changed parts of files, making it faster and more bandwidth-efficient than traditional copying methods provided by tools like sftp or ftp-ssl. Rsync versions 3.3.0 and below has been found with SIX serious vulnerabilities. Attackers could exploit these to leak your data, corrupt your files, or even take over your system. There is a heap-based buffer overflow with a CVSS score of 9.8 that needs to be addressed on both the client and server sides of rsync package. Apart from that info leak via uninitialized stack contents defeats ASLR protection and rsync server can make client write files outside of destination directory using symbolic links.
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How to control the SSH multiplexing with the control commands
15 January 2025 @ 8:29 am
Multiplexing will boost your SSH connectivity or speed by reusing existing TCP connections to a remote host. This is useful when you frequently connect to the same server using SSH protocol for remote login, server management, using IT automation tools over SSH or even running hourly backups. However, sometimes your SSH command (client) will not respond or get hung up on the session when using multiplexing. Typically, this happens when your public IP changes (IPv4 to IPv6 changes when using DNS names), VPN issues, or firewall cuts connections. Hence, knowing SSH client control commands can save you time and boost your productivity when such gotcZFS Raidz Expansion Finally, Here in version 2.3.0
14 January 2025 @ 9:19 am
After years of development and testing, the ZFS raidz expansion is finally here and has been released as part of version 2.3.0. ZFS is a popular file system for Linux and FreeBSD. RAIDz is like RAID 5, which you find with hardware or Linux software raid devices. It protects your data by spreading it across multiple hard disks along with parity information. A raidz device can have single, double, or triple parity to sustain one, two, or three hard disk failures, respectively, without losing any data. Hence, expanding or adding a new HDD is a very handy feature for sysadmins in today's data-sensitive apps.
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How to run Docker inside Incus containers
18 December 2024 @ 5:44 am
Incus and Docker both use Linux kernel features to containerize your applications. Incus is best suited when you need system-level containers that act like traditional VMs and provide a persistent developer experience. On the other hand, Docker containers are ephemeral, i.e., temporary in nature. All files created inside Docker containers are lost when your Docker container is stopped or removed unless you stored them using volumes in different directories outside Docker. Docker is created as a disposable app deployment system. Incus containers are not typically created as disposables, and data is kept inside heartinternet.co.uk
Hosting packages for an initial web presence
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.
What is Web Hosting and Why Does Your Business Need It?
6 May 2025 @ 4:54 pm
Without web hosting, your website would not be visible or accessible to users! It is crucial to host your website with a website hosting service to ensure that your business...
The post What is Web Hosting and Why Does Your Business Need It? appeared first on Heart Internet.
How to Enable Root Access via SSH on Your VPS for Migration using Plesk
11 March 2025 @ 7:41 am
If you get one of the following messages from the Plesk migrator you should check that you are using root as the username along with the Plesk admin password. “The...
The post How to Enable Root Access via SSH on Your VPS for Migration using Plesk appeared first on Heart Internet.
How to Enable Root Access on Your VPS Server Using Plesk
11 March 2025 @ 7:40 am
If you get one of the following messages from the Plesk migrator you should check that you are using root as the username along with the Plesk admin password. “The...
The post How to Enable Root Access on Your VPS Server Using Plesk appeared first on Heart Internet.
Are your website fonts sending the right message?
3 February 2025 @ 10:18 am
Did you know that the fonts you use on your website can impact the way your customers perceive and interact with your brand?
The post Are your website fonts sending the right message? appeared first on Heart Internet.
Black Friday at Heart Internet
28 November 2024 @ 3:27 pm
Black Friday is here, and we’re bringing you incredible savings to help your business thrive online. From 29th November 2024 to 9th December 2024, you can enjoy 15% off some...
The post Black Friday at Heart Internet appeared first on Heart Internet.
13 Easy Ways to Optimise Your Website for Speed and Performance
1 October 2024 @ 2:53 pm
A slow website is like a slow waiter: it doesn’t matter how good the food is if the service is frustratingly sluggish. If your site takes too long to load,...
The post 13 Easy Ways to Optimise Your Website for Speed and Performance appeared first on Heart Internet.
serverfault.com
Common Server issues – FAQs and answers from those in the know
How to set up 802.1X with EAP-TLS certificates to restrict switch access to authorized computers only?
2 February 2026 @ 1:17 pm
I am trying to set up a lab environment where only computers that are authorized with certificates can log in to and configure a network device (Swtich, AP and etc). I want to use 802.1X authentication.
Specifically, I would like guidance on:
Setting up the certificate authority and issuing client certificates.
Configuring 802.1X authentication on the switch (any vendor: Cisco, Aruba, etc.).
Configuring a RADIUS server (Windows NPS or FreeRADIUS) to work with the certificates.
Ensuring that only clients with valid certificates can access the switch and configure it.
I am looking for a step-by-step lab guide or tutorial, preferably one that shows the complete flow from certificate issuance to switch access restriction. Any links to videos, guides, or detailed instructions would be very helpful.
Thank you!
How to use a different IP address on a wireguard interface point to point connection
2 February 2026 @ 11:35 am
I have a Wireguard tunnel on two Debian 12 machines, host1 and host2. They use "tunnel-IP's" with a /31 mask, only for the purpose of this P2P connection, that shouldn't be used elsewhere.
Host IP wg0-IP
host1 172.21.0.1 172.31.0.0/31
host2 172.22.0.1 172.31.0.1/31
host3 172.22.0.2 -
host1 can ping host2. The packets originate from the tunnel-IP 172.31.0.0, and host2 has a route back to host.
host1 fails to ping host3. The packets arrive at host3, but host3does not have a route back to 172.31.0.1/31, so the packets do not return.
host3can ping host1, so static routes for 172.21.0.0/16 are set up correctly.
What is the most robust and reasonable way to set up the tunnel to be used only
Asking advice on using PBR with kubernetes
2 February 2026 @ 9:32 am
My cluster info :
Kubernetes version: 1..3.7
Deployment: bare metal
Installation method: kubesprayHost.
OS: Rocky Linux 9
CNI : Calico v3.30.5 vxlan, with ipvs later nftables. with strictARP.
CRI : containerd v2.1.5
IP forwarding was enabled
rp_filter was disabled
This is the story
I am learning kubernetes, but when configuring my POCs I try to be close to a real life deployment.
For example, in my POC I’ve :
A Firewall, Opnsense that covers all the platform, it’s the entry point of my POC.
01 VM used a deployer (ansible) machine.
03 VMs as controlplan
03 VMs as workers and rook-ceph cluster.
I’ve created several networks :
A management network, where I can access the platform with ssh and kubectl, this network is for admins. In my mind this can be accessed from the LAN also.
A pod to pod network, Calico
Ubuntu Crontab missing sbin in PATH var
2 February 2026 @ 9:07 am
My Logrotate default config is using this postrotate to reload nginx as logs rotation:
postrotate
invoke-rc.d nginx rotate > /dev/null 2>&1
endscript
What I have found is that when running it via crontab, invoke-rc.d is undefined.
This is because $PATH does not contain /usr/sbin, but just /usr/bin:/bin.
I have no custom crontab setup, just the one that comes with Ubuntu and Logrotate.
How to fix this, so Crontab can see /usr/sbin, too?
I am using Docker to build Ubuntu 22.04 environment.
If the cloud is “highly available,” why do outages still take entire regions down? [closed]
2 February 2026 @ 5:53 am
Cloud platforms promise scalability, agility, and operational efficiency—but no cloud is perfect.
If the cloud is “highly available,” why do outages still take entire regions down?
Are we designing for failure—or just hoping our cloud provider won’t fail today?
When your cloud goes down, is it an incident… or a design flaw?
Robocopy to a network drive in task scheduler
2 February 2026 @ 2:50 am
I'm trying to do a simple robocopy to a network drive via powershell and call that from task scheduler.
I can't get the network drive to be visible to powershell in task scheduler. The scripts I test run fine from CMD or in the Powershell ISE
This is the command:
robocopy "E:\Backups\Offsite" "Y:\" /MIR /MT:64 /E
This works fine, except in Task Scheduler.
If I use the UNC path then I get "Error 161 .... The specified path is invalid
robocopy "E:\Backups\Offsite" "\\<obscured>.com.au" /MIR /MT:64 /E
I have tried pushd, and NET USE, but none of those are solving this problem when run via task scheduler.
This is on Windows Server 2022. I have "Run whether user is logged on or not" checked, and "Run with highest priviliges" checked, and nothing else checked.
Why does the same lvreduce command has such different execution times on consecutive runs?
1 February 2026 @ 8:25 pm
I have a VM with a large 6TB disk. The VM has been booted with a Ubuntu24 liveISO. I am incrementally shrinking the logical volume with the time lvreduce --resizefs --size 1T /dev/vgname/lvname command.
The underlying luns in the datastore are seeing little to no activity while this test was conducted.
I have so far ran this command 4 consecutive times and got pretty different execution times:
1st run: real 280m
2nd run: real 327m
3rd run: real 160m
4th run: real 437m
The end goal is replacing the 6TB disk with a smaller 1TB disk and affecting the OS as little as possible.
Why are the execution times so different?
Is this the optimal approach for reducing the size of a logical volume?
Can I shrink an mdadm raid5 partition that is larger than the others?
1 February 2026 @ 2:08 pm
I have a 4-drive mdadm raid5 array comprising 3x 2TB drives and 1x 4TB drive which recently replaced a failed drive. I plan to make all subsequent replacements 4TB drives so eventually I will enlarge the array, but this first one simply went into the array as a single 4TB partition, with the headroom "dead space" for the meantime. (I've done the array enlargement process once already with 1TB -> 2TB drives.)
This time, I forgot to leave ~100MB slack space at the end of the drive, in case subsequent drives are slightly smaller. In this instance I'm quite likely to be buying the same model for the remaining 3x 4TB drives, but I've seen it suggested that that still may not guarantee the drives' capacities will be identical.
What are my options for reducing the size of the new partition? I know I can always fail+remove the new drive and start over, but I'd like to save the time and disk wear if I can.
From the manpage it appears I could --fail
NPM cannot connect to server using Websocket
31 January 2026 @ 9:07 pm
I have a web application that communicates with a server using Websockets. When I access it directly, it works without problems. Unfortunately, when I access it through Nginx Proxy Manager, I get the following message:
Cannot connect to server: timeout
Check is server is reachable at
ws://talker.srv:8000/_event
I have read the documentation about Websocket proxying at:
https://nginx.org/en/docs/http/websocket.html
I have set the Websocket Support to "on", and in the "Custom Locations" tab, I have put in the following:
Location: /_event/
Scheme: http
Forward Hotname/IP: <My-Systems-IP-Address>
Forward Port: 8000
And I have added the following to the location:
location /_event/ {
proxy_pass http://0.0.0.0:8000;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection
RAID1 and RAID6 arrays disappeared in Dell PERC6, all disks are listed as available
31 January 2026 @ 4:51 pm
We have a Dell PowerEdge R740xd server with PERC H730P Mini RAID controller. It has 2x 1.28 Tb SAS hard drives, 1x 12tb SAS, and 6x 12 Tb SATA hard drives installed.
RAID1 was assembled from 2x 1.28 Tb SAS drives, a RAID1+ 1 SAS 12tb hot spare was assembled (it had OS Win Serv on it). RAID6 (data archive) was assembled from 6x 12 Tb SATA hard drives.
We've got a task to add another RAID5 array to store information on 3x 14 Tb SATA hard drives. When creating RAID5 using Dell Lifecycle Controller --- Hardware configuration --- Configure RAID !, we made a fatal error, checked the "Select all available disks" option to create RAID5, and all the listed disks turned out to be available. Accordingly, after a new RAID5 array was created, there was only one RAID5 in the Virtual Disk Management menu, RAID1 and RAID6 disappeared. Moreover, all the SAS hard drives in RAID5 are not turned on, they are in Ready mode. The RAID5 array was quickly initialized.
Realizin
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