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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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Debian Server Useful Commands (Dynamic Post, updated very frequently, for notes use)

For System Restart: sudo reboot

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

For Using 7z:

To install 7z-full:

sudo apt-get update
sudo apt-get install p7zip-full

To add a files file to 7z archive:

7z a <7z-archive-file-name>.7z {files to be archived}

e.g 7z a Apache-NetBeans-12.0-bin-windows-x64.exe.7z Apache-NetBeans-12.0-bin-windows-x64.exe


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To send a running process in background in terminal

Ctrl+z
bg

Now to bring back that process in forground

fg

To start a command directly in background

Type command &
e.g 7z a Apache-NetBeans-12.0-bin-windows-x64.exe.7z Apache-NetBeans-12.0-bin-windows-x64.exe &

To view processes running in background

jobs


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If you have any doubts, please let me know.

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