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...
Post a Comment

libzip, libcurl, libwebsockets, jansson json, gsl what other good libraries in C? (chatGpt discussions)

libzip, libcurl, libwebsockets, jansson json, gsl what other good libraries in C?
ChatGPT said:
ChatGPT

Here’s a list of other useful libraries in C, categorized by their purpose, that can complement the ones you mentioned:

1. Networking and Protocols

  • libuv: A multi-platform asynchronous I/O library, used for network operations and file system interactions. Powers Node.js.
  • asio: While more known in C++, it has a C API for network programming (TCP, UDP, etc.).
  • libevent: Provides asynchronous event notification for network services and supports multi-threading.
  • ZeroMQ: High-performance asynchronous messaging library for building scalable distributed systems.

2. Compression and Archiving

  • zlib: A popular and highly efficient compression library.
  • bzip2: Another compression library, focused on higher compression ratios than zlib.
  • LZ4: An extremely fast compression library, optimized for speed rather than compression ratio.
  • zstd (Zstandard): A fast and efficient compression algorithm with adjustable levels of compression.

3. Database and Storage

  • SQLite: A C library for embedded databases. It’s lightweight and widely used.
  • LevelDB: A fast key-value storage library developed by Google, suitable for large-scale data.
  • LMDB (Lightning Memory-Mapped Database): A fast, memory-mapped, key-value store database, highly efficient for embedded systems.
  • Redis C API: Access to Redis databases through C with their native API.

4. Cryptography and Security

  • OpenSSL: One of the most widely used libraries for SSL/TLS, and general cryptographic operations.
  • libsodium: A modern, easy-to-use cryptography library, designed to improve upon NaCl (Networking and Cryptography Library).
  • mbedTLS: A lightweight cryptographic and SSL/TLS library for small devices.
  • bcrypt: Hashing library for secure password hashing.

5. Concurrency and Multithreading

  • pthreads: The POSIX thread library, widely used for multithreading on Unix-like systems.
  • C11 Threads: The standard threading API in C11, though not widely adopted everywhere yet.
  • TinyCThread: A portable, minimalist C library implementing the C11 threading standard.

6. Data Structures and Algorithms

  • uthash: A hash table library for C that is easy to integrate and use.
  • sds (Simple Dynamic Strings): A powerful string library used by Redis.
  • Klib: A small, lightweight collection of hash tables, dynamic arrays, and other utilities.
  • glib: Part of the GNOME project, providing data structures (linked lists, hash tables, etc.), event loops, and utilities.

7. File and I/O Handling

  • libmagic: Used for identifying the type of data in files (used in file command).
  • PCRE (Perl Compatible Regular Expressions): A widely used regular expression library.
  • inotify: Linux-specific library for monitoring filesystem events.

8. Graphics, Audio, and Media

  • SDL (Simple DirectMedia Layer): A cross-platform library for handling graphics, audio, and input, widely used in game development.
  • FFmpeg: A comprehensive library to handle video, audio, and other multimedia files.
  • cairo: A 2D graphics library supporting multiple output devices (X11, Win32, image buffers, etc.).
  • portaudio: A cross-platform audio library that enables audio playback and recording.

9. Mathematics, Statistics, and Numerical Libraries

  • FFTW: A fast Fourier transform library widely used for signal processing.
  • Armadillo: C++ based but usable in C for linear algebra and scientific computing.
  • OpenBLAS: An optimized BLAS (Basic Linear Algebra Subprograms) library.
  • SuiteSparse: A library for sparse matrix computations (useful in scientific computing).
  • mpfr (Multiple Precision Floating-Point): A library for arbitrary precision arithmetic.

10. XML, YAML, and Serialization

  • libxml2: A library for parsing XML documents, widely used and maintained.
  • yaml-c: A simple library for parsing and writing YAML files in C.
  • protobuf (Google Protocol Buffers): Efficient and flexible for serializing structured data, with a C API.
  • flatbuffers: A high-performance serialization library optimized for efficiency and simplicity.

11. Concurrency and Parallelism

  • OpenMP: Provides support for multi-platform shared memory multiprocessing.
  • OpenMPI: A message-passing interface library for parallel computing.

12. Miscellaneous Utilities

  • cURL: Already mentioned, but also consider libmicrohttpd for lightweight HTTP/HTTPS web servers.
  • argp: A command-line argument parsing library commonly used in GNU projects.
  • jansson (for JSON): You already mentioned it, but others include json-c (lightweight JSON parsing and building library).
  • inih (INI Not Invented Here): A simple INI file parser in C, useful for configuration management.
  • Gnuplot C API: If you need graphical plotting in your applications.

13. Testing Frameworks

  • Check: A unit testing framework for C, useful for building test-driven applications.
  • CUnit: Another popular lightweight testing framework for C.
  • Google Test (gtest): Primarily for C++, but can be used in C projects as well.

These libraries cover a wide range of functionalities, from networking to data processing and numerical computation, which makes them great additions to your toolkit. Each of these libraries is mature, well-documented, and widely used in their respective domains.

======================

Query:
Some common b2b suppliers in India (may also support dropshipping)

DeepSeek reply:

If you're looking for top Indian dropshipping suppliers with a good reputation for selling within India, here’s a curated list of reliable platforms and suppliers that cater specifically to the Indian market. These suppliers are known for their quality products, fast shipping, and ease of use:

1. WholesaleBox.in

  • Overview: A popular B2B platform in India that connects resellers with suppliers.

  • Products: Fashion, electronics, home decor, beauty, and more.

  • Why Choose:

    • Wide range of products.

    • Local suppliers for faster shipping.

    • No minimum order quantity (MOQ).

  • Best For: Beginners and small-scale dropshippers.

  • Website: WholesaleBox.in

2. IndiaMART

  • Overview: One of India’s largest B2B marketplaces, connecting buyers and suppliers.

  • Products: Electronics, fashion, industrial goods, home decor, and more.

  • Why Choose:

    • Huge supplier network.

    • Direct communication with suppliers.

    • No MOQ for many products.

  • Best For: Sellers willing to invest time in finding and vetting suppliers.

  • Website: IndiaMART

3. Udaan

  • Overview: A fast-growing B2B platform focused on quick delivery and competitive pricing.

  • Products: Electronics, fashion, home decor, groceries, and more.

  • Why Choose:

    • Fast shipping within India.

    • Competitive pricing.

    • Wide product range.

  • Best For: Sellers looking for fast delivery and competitive pricing.

  • Website: Udaan

4. Go4WorldBusiness

  • Overview: A global B2B platform with a strong presence of Indian suppliers.

  • Products: Electronics, fashion, home decor, and more.

  • Why Choose:

    • Access to Indian suppliers.

    • No MOQ for many products.

    • Easy to use.

  • Best For: Sellers targeting the Indian market with reliable suppliers.

  • Website: Go4WorldBusiness

5. TradeIndia

  • Overview: A B2B platform connecting Indian suppliers with buyers.

  • Products: Electronics, fashion, industrial goods, and more.

  • Why Choose:

    • Large supplier network.

    • No MOQ for many products.

    • Direct communication with suppliers.

  • Best For: Sellers willing to invest time in finding and vetting suppliers.

  • Website: TradeIndia

6. Just Dropship

  • Overview: A dropshipping platform specifically designed for Indian sellers.

  • Products: Fashion, electronics, home decor, and more.

  • Why Choose:

    • Curated list of Indian suppliers.

    • No MOQ.

    • Easy integration with e-commerce platforms.

  • Best For: Sellers looking for a dedicated dropshipping platform in India.

  • Website: Just Dropship

7. Dropship India

  • Overview: A dropshipping platform offering products from Indian suppliers.

  • Products: Fashion, electronics, home decor, and more.

  • Why Choose:

    • Focused on the Indian market.

    • No MOQ.

    • Fast shipping within India.

  • Best For: Sellers targeting the Indian market.

  • Website: Dropship India

8. eSources India

  • Overview: A B2B platform connecting Indian suppliers with resellers.

  • Products: Electronics, fashion, home decor, and more.

  • Why Choose:

    • Large supplier network.

    • No MOQ for many products.

    • Direct communication with suppliers.

  • Best For: Sellers willing to invest time in finding and vetting suppliers.

  • Website: eSources India

9. ExportersIndia

  • Overview: A B2B platform connecting Indian suppliers with buyers.

  • Products: Electronics, fashion, industrial goods, and more.

  • Why Choose:

    • Large supplier network.

    • No MOQ for many products.

    • Direct communication with suppliers.

  • Best For: Sellers willing to invest time in finding and vetting suppliers.

  • Website: ExportersIndia

10. ShopClues Wholesale

  • Overview: A B2B platform by ShopClues, offering products from Indian suppliers.

  • Products: Electronics, fashion, home decor, and more.

  • Why Choose:

    • Wide range of products.

    • Competitive pricing.

    • Fast shipping within India.

  • Best For: Sellers looking for a trusted platform with a wide product range.

  • Website: ShopClues Wholesale

Key Tips for Choosing a Supplier

  1. Check Reviews and Ratings:

    • Look for suppliers with high ratings and positive reviews.

  2. Test Product Quality:

    • Order samples to check product quality before listing them on your website.

  3. Compare Pricing:

    • Compare prices across multiple suppliers to ensure competitive pricing.

  4. Evaluate Shipping Times:

    • Choose suppliers with fast and reliable shipping.

  5. Check Return Policies:

    • Ensure the supplier has a clear and fair return policy.

Final Thoughts

These Indian dropshipping suppliers are reliable and cater specifically to the Indian market. Start with platforms like WholesaleBox.in, Udaan, or Just Dropship for ease of use and fast shipping. As you gain experience, you can explore other platforms like IndiaMART or TradeIndia for a wider product range.

Let me know if you’d like help with setting up your dropshipping business or choosing the right supplier!

Comments

Post a Comment

If you have any doubts, please let me know.

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
Post a Comment
Read more

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 ...
Post a Comment
Read more

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!
Post a Comment
Read more