Skip to main content

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...

Discussions regarding pet dog with chatGpt

Query:
suppose someone kept dog in his house to prevent from thieft. Does keeping dog actually help to prevent thieft, n keeping house safe?
ChatGPT said:

Yes, keeping a dog can help prevent theft and improve home security, but its effectiveness depends on several factors:

✅ How a Dog Helps Prevent Theft:

  1. Deterrent Effect:
    Most burglars look for easy targets. A barking dog—especially a large or loud one—can make them think twice, fearing noise, attention, or attack.

  2. Alert System:
    Dogs often hear and sense intruders before humans do. Their barking can alert the homeowner or neighbors.

  3. Unpredictability:
    Unlike security systems, dogs move around, react instinctively, and can't be easily hacked or disabled.

❌ Limitations:

  • Not all dogs are protective:
    Some breeds are friendly to strangers or get scared easily.

  • Trained dogs are better:
    Guard or watchdog breeds (like German Shepherds, Dobermans, Rottweilers) are more effective than toy breeds or very passive dogs.

  • Can be bypassed:
    A determined thief might carry treats, use distractions, or know the dog's behavior.

✅ Bonus:

  • Dogs provide emotional support and companionship, in addition to security.

In summary:
Yes, a dog can enhance security and deter theft, especially when combined with other measures like locks, lights, and cameras.

Would you like suggestions on dog breeds that are good for guarding homes?

You said:
Now suppose someone has kept dog in his house to prevent thieft. Dog is well feeded, etc. Not thieft come in house to steal, n upon seeing dog he through some meat/ fish/ etc type food in front of dog. Will dog still bark/ scare away thief or start eating meat & let thief do his stealling work?
ChatGPT said:

Great question—and a very practical one.

In many cases, yes, the dog might get distracted and eat the food, especially if:

  • The dog is not specifically trained to ignore food from strangers.

  • The thief uses strong-smelling or appealing food (like meat or fish).

  • The dog is naturally friendly or not particularly territorial.

So what actually happens?

  1. Untrained pet dogs (even if well-fed) often get distracted by food.

  2. If the thief is confident and calm, the dog may not perceive them as a threat.

  3. Some dogs may bark once, then settle down and eat.

  4. A few dogs might even follow the thief thinking it’s play or attention.

On the other hand:

  • Well-trained guard dogs are taught to:

    • Ignore food from strangers.

    • Bark or attack when they see unfamiliar people.

    • Stay alert to abnormal behavior.

Real-life outcome?

Most pet dogs are not reliable security if the thief uses bait.
Unless trained, many will fall for the distraction—even if they’re full.

Conclusion:

If you want a dog to be a reliable security layer, training is essential. Otherwise, it’s more of a psychological deterrent than a physical one.

Would you like to know what kind of training is needed to make a dog ignore such tricks?

You said:
Suppose someone kept well trained guard dog in his house to prevent theift. A thief starts regularly entering house n feeded some meat/ fish/ this type of food from boundry to dog whenever he find dog alone or in night for few days/ months (without coming in eye of any human). Now after doing all these thief enters house to do stealing. Will dog let thief do his stealing work (normal cases)?
ChatGPT said:

Excellent scenario—this brings up an important and realistic tactic that some clever thieves might try: conditioning or "befriending" the guard dog over time.

So in your case:

  • The thief feeds the trained guard dog regularly from outside.

  • The dog gets used to the thief’s presence, smell, and offerings over time.

  • After days/weeks/months of this routine, the thief enters the house.


Will the dog allow the thief to steal?

In many real-world cases—yes, even trained dogs can be compromised over time through repeated friendly interaction and feeding. Here's why:


🧠 Psychological Conditioning (Like Pavlov’s Dog):

  • Repetition creates trust: The thief becomes a “known” figure to the dog.

  • Positive association: Smell and voice of thief → reward (food).

  • Reduced threat perception: Dog no longer sees this person as a danger.


🐕 Even for Trained Dogs:

  • If training isn’t reinforced regularly, dogs may forget to stay alert.

  • Some dogs are obedient only to commands, not to general threat detection.

  • Very loyal or intelligent breeds might still bark, but many can be “won over.”


✅ When a Dog Won’t Be Tricked:

  • Dogs trained in "food refusal" (ignoring food unless from master).

  • Dogs trained to recognize authorized vs unauthorized people.

  • Professionally handled K9-style dogs (like those used by police/military).

  • Guard dogs that work in pairs or with human supervision.


🔚 Final Answer:

In normal civilian cases (non-military/police dog), even a well-trained dog can be compromised if:

  • The thief is consistent, smart, and careful.

  • The dog’s training isn’t strict about food refusal and stranger detection.

  • The household doesn’t reinforce guard training.

So yes, in many normal cases, the dog may ignore or even greet the thief after such gradual manipulation.

Comments

Popular posts from this blog

Ubuntu Notes: Set up autossh as systemd useful-reminder commands

 sudo vim /etc/systemd/system/permanentAutossh.service ======================================== [Unit] Description=Keeps a tunnel to myOciFreeNat open After=network-online.target [Service] User=<username> Environment="AUTOSSH_GATETIME=0" ExecStart=/usr/bin/autossh -M 0 -q -N -o "ServerAliveInterval 60" -o "ServerAliveCountMax 3" -L 4322:127.0.0.1:5432 -i /<ssh_private_key_file_absolute_path> <username>@<ip_address> -p 22 [Install] WantedBy=multi-user.target ======================================== sudo systemctl daemon-reload sudo systemctl enable permanentAutossh sudo systemctl start permanentAutossh ================== sudo systemctl daemon-reload sudo systemctl restart permanentAutossh sudo systemctl status permanentAutossh ====================== sudo systemctl stop permanentAutossh sudo systemctl disable permanentAutossh sudo rm /etc/systemd/system/permanentAutossh.service

syslog cpp programming: learning using chatGcp

  Introduction to Syslog C++ August 27, 2024 This conversation may reflect the link creator’s personalized data, which isn’t shared and can meaningfully change how the model responds. You said: I am new to syslog in cpp programming n just starting. Can you teach me ChatGPT said: ChatGPT Sure! syslog is a standard for logging system messages in Unix-like operating systems. It provides a way to send log messages to the system log, which can then be collected and analyzed by various tools. Here's a basic guide to get you started with syslog in C++: 1. Include the Necessary Header To use syslog , you need to include the syslog.h header: cpp Copy code # include <syslog.h> 2. Open the Connection to syslog Before sending log messages, you need to open a connection to the syslog system. This is typically done at the start of your program: cpp Copy code openlog ( "your_program_name" , LOG_PID | LOG_CONS, LOG_USER); "your_program_name" : A string representing ...

Ubuntu - C++ Notes: Install & update boost c++ library from git (may contain some error in process mentioned below)

 Boost C++ Library Installation from git in ubuntu: 1. create a directory named boost in your desired location and go to that directory mkdir boost;cd boost; 2. clone boost recursively from git using command git clone --recursive https://github.com/boostorg/boost.git 3. cd boost; sudo ./bootstrap.sh; 4. sudo ./b2; 5. sudo ./b2 install; DONE! --------------------------- Boost C++ Library Update Verson from git in Ubuntu: 1. go to gitDownloads/boost directory cd gitDownloads/boost; 2. git pull; 3. git submodule update --recursive; 4. cd boost; sudo ./bootstrap.sh; 5. sudo ./b2; 6. sudo ./b2 install; DONE!