I check in the directory opencv/build/bin directory and can the see other utilities there, but can't find opencv_createsamples.
I don't know if this is related but I noticed the CMakeLists.txt in the opencv/apps/ directory have commented out the lines:
# ocv_add_app(traincascade)
# ocv_add_app(createsamples)
I am running an Ubuntu 18.04.1 LTS version
Thank you in advance.