🏗️ Workspace

• A workspace is a top-level directory where you develop ROS 2 projects.
• It organizes everything into a structure so that colcon build knows what to compile.
• It always contains these subfolders (after a build):

# Create workspace
mkdir -p ~/ros2_ws/src
cd ~/ros2_ws/src

Now you have:

ros2_ws/
 └── src/

3️⃣ Build Your Workspace

After creating packages, go back to the workspace root and build:

cd ~/ros2_ws
colcon build

If build succeeds, new folders appear:

ros2_ws/
 ├── build/
 ├── install/
 ├── log/
 └── src/

4️⃣ Source the Overlay

To use your new packages:

source /opt/ros/humble/setup.bash       # source underlay
source ~/ros2_ws/install/local_setup.bash   # source overlay

#you have to SOURCE so that your shell(terminal) can find ros2 packages and your workspace packages