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How to use gdb in Ubuntu Terminal

Here's a practical, minimal guide for using GDB in Ubuntu terminal — from launching to setting breakpoints and navigating your code. 🧰 Step 1: Compile with Debug Symbols Use -g and disable optimizations ( -O0 preferred for debugging): bash Copy Edit g++ -g -O0 -o myprog myprog.cpp 🚀 Step 2: Launch GDB bash Copy Edit gdb ./myprog You'll see a (gdb) prompt. 🎯 Step 3: Set Breakpoints You can set breakpoints in three main ways : ✅ a. At a function gdb Copy Edit (gdb) break main ✅ b. At a specific file and line gdb Copy Edit (gdb) break myprog.cpp:42 ✅ c. At a method in a class gdb Copy Edit (gdb) break MyClass::doSomething If the symbol is mangled (C++), GDB usually demangles automatically, especially if compiled with -g . ▶️ Step 4: Run the Program gdb Copy Edit (gdb) run 🧭 Step 5: Navigate Command Meaning next or n Step over current line step or s Step into function call finish Run until current function returns continue or c Continue until...

Manual Knife Sharpener 3 Stage Sharpening Tool for Ceramic Knife and Steel Knives vs Knife Sharpener Stone: Discussion with chatGpt

Query:


ChatGpt reply:

Here's a practical comparison between the Manual 3-Stage Knife Sharpener Tool and a Knife Sharpening Stone, especially for someone like you (technical, detail-oriented, results-focused):


🔪 1. Sharpening Mechanism & Control

Feature Manual 3-Stage Sharpener Sharpening Stone
Mechanism Pre-set angle, pull-through slots Manual control over angle and pressure
User Control Low – guided slots High – full control over bevel/edge
Learning Curve Very low (plug & play) Medium to high (technique matters)
Sharpening Precision Moderate – acceptable edge for most use cases Very precise – used for razor-sharp edges


🧱 2. Compatibility (Steel vs Ceramic)

Feature Manual 3-Stage Sharpener Sharpening Stone
Ceramic Knife Support Some models support, usually poorly Only specific diamond stones are good here
Steel Knife Support Yes – especially for home kitchen knives Yes – all types, especially high-carbon steel

⚠️ Most manual 3-stage sharpeners are not great for ceramic knives despite the claim. Ceramic blades require diamond abrasives, which many stones and few manual tools provide.

🔧 3. Build Quality, Maintenance & Lifespan

Feature Manual 3-Stage Sharpener Sharpening Stone
Lifespan Moderate – wears out, especially cheap ones High – quality stone lasts decades
Maintenance None required (usually) Needs flattening, occasional cleaning
Portability Very portable Less portable (unless small pocket stone)

⏱️ 4. Speed & Convenience

FeatureManual 3-Stage SharpenerSharpening Stone
Time to Sharpen1–2 minutes5–20 minutes depending on skill
Setup TimeNoneWater/oil soaking, stone prep may be needed

💵 5. Cost Comparison

FeatureManual 3-Stage SharpenerSharpening Stone
Price Range (INR)₹300 – ₹1200₹500 – ₹5000+
Long-Term ValueLow to mediumHigh (if you're sharpening often)

🧠 Verdict – Which Should You Choose?

✅ Choose Manual 3-Stage Sharpener if:

  • You just want fast, no-skill sharpening.

  • You have mostly soft steel kitchen knives.

  • You sharpen occasionally, and performance isn’t critical.

  • You're looking for a budget, no-maintenance solution.

✅ Choose Sharpening Stone if:

  • You want razor-sharp precision, even on expensive knives.

  • You sharpen frequently (chef, knife collector, or DIY pro).

  • You're okay investing time to learn proper technique.

  • You have high-carbon or Japanese knives, or do sharpening as a side gig/service.


💡 Bonus (Money-Making Angle)

You could offer a local or online knife sharpening service using whetstones or guided systems. Example:

  • Startup Cost: ₹3000–₹10,000 for good stones.

  • Earning Potential:

    • ₹50–₹200 per knife locally (₹300–₹2000/hour depending on throughput).

    • ₹1000–₹2000 per month passive if paired with content (e.g., YouTube “How to Sharpen Knives” channel + affiliate links to stones/tools).

  • Web App Angle: Build a booking/payment system for local sharpening gigs or even a rental model for knife sharpeners.


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