rosservice command not found

The "rosservice" command is a command-line tool that is part of the ROS (Robot Operating System) framework. If you are getting the error message "rosservice command not found," it means that the tool is not installed on your system or the environment variables are not set up correctly.

To fix this issue, you can try the following steps:

1. Check if the ROS package is installed on your system by running the command: "rosversion -d". If it returns the version number, then ROS is installed.

2. Make sure that the ROS environment variables are set up correctly by running the command: "source /opt/ros/<distro>/setup.bash" (replace <distro> with your ROS distribution, such as "kinetic" or "melodic").

3. If the "rosservice" command is still not found after these steps, you may need to install the "ros-<distro>-rosapi" package (replace <distro> with your ROS distribution) using the command: "sudo apt-get install ros-<distro>-rosapi".

4. Once the package is installed, try running the "rosservice" command again, and it should work.

If you're still having problems, it may be helpful to consult the ROS documentation or seek help from the ROS community.