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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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Google Cloud Plateform VM Instances: How to connect one VM Instance to other using SSH and Internal IP Address

 Dear Friends, all of us know that there are two kinds of IP Address that can be assigned to GCP VM Instances (i.e Compute Engine), now if you take external IP address, without any reason then you will have to pay since external IP address is not free.

So if you need to connect two compute engines via internal IP address using terminal for same region, via SSH, process is same as you connect via extermal IP address.

i.e ssh <username>@<internal_ip_address>.

Other advantage of connection via internal IP address is that it uses Internal LAN instead of Internet Data for communication will in turn will save lot of energy.

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If you have any doubts, please let me know.

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