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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...
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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!

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If you have any doubts, please let me know.

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