KernelPath vs Cabling Trainer

KernelPath is a comprehensive, interactive course on operating system kernels — built entirely for iPad and iPhone. GO FROM ZERO TO KERNEL FLUENT Work through 7 structured modules covering the full Linux kernel stack: architecture, processes, memory, file systems, networking, security, and device drivers. Each lesson combines clear explanations with real C code examples, diagrams, and practical command-line usage. LEARN BY DOING 14 interactive labs let you visualize concepts that textbooks struggle to explain: - Step through the boot sequence from BIOS to login - Watch the CFS scheduler assign CPU time to competing processes - Walk a page table translation from virtual to physical address - Trace a system call from user space into the kernel - Animate a TCP three-way handshake in real time - Build and test seccomp filters on system calls - Follow a read() call from application through the driver stack to hardware PRACTICE IN A REAL TERMINAL A built-in Linux terminal simulator gives you a virtual machine to explore. Navigate a realistic filesystem with /proc, /sys, /dev, and /etc. Run 50+ real commands — ls, ps aux, free -h, ip addr, cat /proc/cpuinfo, lsmod, and many more — all producing authentic Linux output. TEST YOUR KNOWLEDGE Each module ends with a quiz. Detailed explanations for every answer reinforce what you learned and fill in gaps. TRACK YOUR PROGRESS A personal dashboard shows completed lessons, quiz scores, and module-by-module progress so you always know where you left off. WHAT YOU'LL LEARN - Kernel architectures: monolithic, microkernel, and hybrid designs - Process lifecycle: fork(), exec(), scheduling, IPC, and signals - Virtual memory: page tables, the MMU, allocation, and swap - File systems: VFS, ext4 internals, inodes, and permissions - Networking: TCP/IP stack, packet encapsulation, sockets, and netfilter - Security: DAC, capabilities, SELinux, AppArmor, and seccomp - Device drivers: character and block devices, udev, and driver architecture BUILT FOR LEARNERS No prior kernel experience required. Start from "What is a Kernel?" and build up to writing device drivers and configuring seccomp filters. Perfect for computer science students, self-taught developers, SREs, and anyone who wants to understand what happens beneath the surface of every application.

Master Ethernet cable color order for the T568A and T568B standards through interactive practice and quizzes. Cabling Trainer helps network administrators and students memorize the wire color sequence used to terminate RJ-45 connectors. Whether you're preparing for a network certification, studying for IT classes, or refreshing your hands-on skills, the app gives you a focused, distraction-free way to drill the patterns. KEY FEATURES • Learning mode: Side-by-side T568A vs T568B reference with crossover/straight-through guidance • Quiz mode: Identify the cable type from a randomized wire arrangement — instant feedback and progress tracking • Color game: Tap the wires in the correct T568A or T568B sequence under a configurable timer • Statistics: Per-mode accuracy, streak tracking, and color-order familiarity history • Multilingual: Available in English and Korean WHO IS IT FOR • Students preparing for network administrator certifications • IT technicians who terminate RJ-45 cables on the job • Anyone learning structured cabling fundamentals from scratch The app stores all progress locally — no account required, no data leaves your device. Light, fast, and ad-supported.