Learn Linux with Dan

Ethernet cables come in CAT categories, each one defines bandwidth, speed, and how far you can push data before signal quality drops 😎👇

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#ethernet #homelab #networkengineer #networkcable #technology

On Linux, every file has rules. Who can read it. Who can modify it. Who can execute it. And since Linux treats almost everything as a file, those three little permission bits quietly control your entire system. Learn them once, and you stop guessing and start controlling your environment 😎👇

Find high-res pdf ebooks with all my Linux related infographics at https://study-notes.org

#linux #cybersecurity #infosec #security #techtips

Backup software is one of those tools you hope you never need until the day everything goes wrong. It quietly keeps copies of your files and system so you can recover when data disappears, gets corrupted, or a system crashes.

Here are a list of backup software available on Linux 😎👇

Find high-res pdf ebooks with all my Linux related infographics at https://study-notes.org

#linux #technology #datastorage #backup #sysadmin #opensource

Linux loves its acronyms. They are often clever, sometimes recursive, and occasionally ridiculous, mixing real technical meaning with inside jokes and wordplay. It is part of the open-source culture: serious engineering, zero seriousness about naming 😎👇

Find high-res pdf ebooks with all my Linux related infographics at https://study-notes.org

#linux #opensource #softwareengineer #operatingsystem #software

Linux provides special permissions like SUID, SGID, and the Sticky Bit that go beyond basic read, write, and execute permissions, modifying execution behavior and controlling file deletion in shared directories 😎👇

Find high-res pdf ebooks with all my Linux related infographics at https://study-notes.org

#linux #cybersecurity #infosec #informationsecurity #sysadmin

GNU/POSIX ps syntax is composable and script friendly, giving precise, non interactive control over process selection and formatting compared to BSD style’s more ad hoc, human oriented flags.

Here are useful ps command examples in GNU style 😎👆

Find high-res pdf ebooks with all my Linux related infographics at https://study-notes.org

#linux #sysadmin #devops #opensource #tech

Even in the AI era, learning to code still matters. It is the difference between just using AI tools and actually controlling what they can do. And if you have that mindset, there are plenty of great resources online to help you start 😎👇

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#programming #coding #techjobs #upskilling #software

Spoofing attacks manipulate identity or trust signals across network layers to deceive systems and redirect or disrupt legitimate communication.

Here are different types of spoofing attacks across OSI layers 😎👇

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#cybersecurity #infosec #pentesting #informationsecurity #ethicalhacker

Markdown is everywhere these days—README files, docs, notes, even changelogs. If you spend most of your time in the terminal, Glow lets you read those Markdown files right there without opening a browser or GUI 😎👇

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#opensource #technology #productivity #coding #programming

Sandboxing is about limiting what an app can see and do if something goes wrong.

Linux supports this at multiple layers. The kernel provides isolation primitives like namespaces and syscall filtering, and user space tools build on top of them to make sandboxing practical and usable 😎👇

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#linux #cybersecurity #infosec #pentest #ethicalhacker

A password manager keeps all your logins in one secure place. It generates strong passwords, remembers them for you, and fills them in when needed—so you only have to remember one master password.

Here are free password managers that work across multiple operating systems 😎👇

Find high-res pdf ebooks with all my cybersecurity related infographics at https://study-notes.org

#cybersecuritytips #informationsecurity #password #datasecurity #onlineprivacy

SSDs come in various shapes and interfaces, like 2.5”, M.2, and U.2, mSATA, each designed for different performance needs, physical constraints and connection types

Here are a quick comparison on different SSD form factors 😎👇

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#datastorage #ssd #technology #computerhardware #computer

Ever wish you could just run a command and keep seeing it update automatically as things change? That is exactly what the watch command does on Linux

Here are useful examples of the watch command 😎👇

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#linux #sysadmin #devops #cybersecurity #softwaredeveloper

“Signals” provide a lightweight mechanism for the Linux kernel and other processes to asynchronously notify a running process about events such as faults, user interrupts, or system conditions 😎👇

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#linux #software #devops #upskilling #softwaredeveloper

Machine learning spans multiple learning paradigms, each leveraging distinct algorithmic strategies to extract structure, make predictions, and adapt to data in different ways 😎👇

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#machinelearning #ai #aitools #deeplearning #datascience

Here I am visualizing a benchmark result of n-body physics simulation done with different programming languages 😎👇

See the full result:
https://programming-language-benchmarks.vercel.app/amp/problem/nbody

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#programming #coding #softwareengineer #technology #programmer

When you type a command in Bash, it follows a series of steps to look up the name and decide what to execute 😎👇

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#linux #opensource #softwareengineer #sysadmin #software

An SSH reverse tunnel lets a remote server listen on a port and forward incoming connections through an SSH tunnel to a service running on another machine. It is commonly used to expose a service on a machine behind NAT or a firewall to the outside network 😎👇

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#linux #cybersecurity #infosec #ethicalhacker #sysadmin

TUIOS is a slick terminal-based window manager that lets you juggle multiple terminal sessions with a clean, modern interface—no desktop required 😎👇

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#linux #productivity #softwareengineer #opensource #software

OpenCode is an open-source AI coding agent that runs in your terminal, IDE, or desktop, letting you write, refactor, and manage code using 75+ different LLM providers through a single unified interface 😎👇

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#copilot #ai #aitools #coding #programming

Your location can be inferred from many signals around you—GPS, Wi Fi networks, Bluetooth beacons, cellular towers, and device sensors—all capable of revealing where you are with different levels of precision.

Here are a list of available location techniques 😎👇

Find high-res pdf ebooks with all my cybersecurity related infographics at https://study-notes.org

#cybersecurity #privacy #onlineprivacy #dataprivacy #informationsecurity