/usr/share/mrpt/config_files/ is in mrpt-apps 1:1.0.2-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/mrpt/config_files/2d-slam-demo/
/usr/share/mrpt/config_files/2d-slam-demo/2dslam-test.ini
/usr/share/mrpt/config_files/README.txt
/usr/share/mrpt/config_files/grid-matching/
/usr/share/mrpt/config_files/grid-matching/gridmatch_example.ini
/usr/share/mrpt/config_files/hmt-slam/
/usr/share/mrpt/config_files/hmt-slam/freidburg.ini
/usr/share/mrpt/config_files/hmt-slam/malaga.ini
/usr/share/mrpt/config_files/icp-slam/
/usr/share/mrpt/config_files/icp-slam/icp-gas-mapping.ini
/usr/share/mrpt/config_files/icp-slam/icp-slam_demo_LM.ini
/usr/share/mrpt/config_files/icp-slam/icp-slam_demo_classic.ini
/usr/share/mrpt/config_files/icp-slam/icp-slam_demo_classic_gridmatch.ini
/usr/share/mrpt/config_files/icp-slam/icp-slam_demo_with_octomap.ini
/usr/share/mrpt/config_files/kf-slam/
/usr/share/mrpt/config_files/kf-slam/EKF-SLAM_6D_noncentered_test.ini
/usr/share/mrpt/config_files/kf-slam/EKF-SLAM_6D_test.ini
/usr/share/mrpt/config_files/kf-slam/EKF-SLAM_6D_test_datassoc.ini
/usr/share/mrpt/config_files/kf-slam/EKF-SLAM_6D_test_no_odometry.ini
/usr/share/mrpt/config_files/kf-slam/EKF-SLAM_test.ini
/usr/share/mrpt/config_files/kf-slam/EKF-SLAM_test_2d.ini
/usr/share/mrpt/config_files/kf-slam/partition_EKF-SLAM_test.ini
/usr/share/mrpt/config_files/pbmap/
/usr/share/mrpt/config_files/pbmap/configLocaliser.ini
/usr/share/mrpt/config_files/pbmap/configPbMap.ini
/usr/share/mrpt/config_files/pf-localization/
/usr/share/mrpt/config_files/pf-localization/localization_demo.ini
/usr/share/mrpt/config_files/pf-localization/localization_demo_obsonly_rawlog.ini
/usr/share/mrpt/config_files/rawlog-grabber/
/usr/share/mrpt/config_files/rawlog-grabber/Enose_v2.ini
/usr/share/mrpt/config_files/rawlog-grabber/KVHDSP3000.ini
/usr/share/mrpt/config_files/rawlog-grabber/PhidgetIK.ini
/usr/share/mrpt/config_files/rawlog-grabber/RFID.ini
/usr/share/mrpt/config_files/rawlog-grabber/SICK_LMS_500k.ini
/usr/share/mrpt/config_files/rawlog-grabber/SICK_LMS_serial.ini
/usr/share/mrpt/config_files/rawlog-grabber/Wifi.ini
/usr/share/mrpt/config_files/rawlog-grabber/activmedia_robot.ini
/usr/share/mrpt/config_files/rawlog-grabber/camera_1394.ini
/usr/share/mrpt/config_files/rawlog-grabber/camera_opencv.ini
/usr/share/mrpt/config_files/rawlog-grabber/camera_stereoBumblebee.ini
/usr/share/mrpt/config_files/rawlog-grabber/dataset_citroen.ini
/usr/share/mrpt/config_files/rawlog-grabber/hokuyo_UTM.ini
/usr/share/mrpt/config_files/rawlog-grabber/hokuyo_UXM.ini
/usr/share/mrpt/config_files/rawlog-grabber/kinect.ini
/usr/share/mrpt/config_files/rawlog-grabber/ntrip_emitter.ini
/usr/share/mrpt/config_files/rawlog-grabber/patrolbot_enoses.ini
/usr/share/mrpt/config_files/rawlog-grabber/ptuHokuyo.ini
/usr/share/mrpt/config_files/rawlog-grabber/ptuHokuyoCamera.ini
/usr/share/mrpt/config_files/rawlog-grabber/roadbot-all.ini
/usr/share/mrpt/config_files/rawlog-grabber/rtkgps-lasers.ini
/usr/share/mrpt/config_files/rawlog-grabber/swissranger_cam.ini
/usr/share/mrpt/config_files/rawlog-grabber/tuHokuyo.ini
/usr/share/mrpt/config_files/rawlog-grabber/two_cameras_1394.ini
/usr/share/mrpt/config_files/rawlog-grabber/xsens_IMU.ini
/usr/share/mrpt/config_files/rbpf-slam/
/usr/share/mrpt/config_files/rbpf-slam/RO-SLAM_simulatedData_MC.ini
/usr/share/mrpt/config_files/rbpf-slam/RO-SLAM_simulatedData_SOG.ini
/usr/share/mrpt/config_files/rbpf-slam/example_3_gridmaps.ini
/usr/share/mrpt/config_files/rbpf-slam/gas_mapping_2lasers_2enoses.ini
/usr/share/mrpt/config_files/rbpf-slam/gridmapping_RBPF_ICPbased_intel.ini
/usr/share/mrpt/config_files/rbpf-slam/gridmapping_RBPF_ICPbased_malaga.ini
/usr/share/mrpt/config_files/rbpf-slam/gridmapping_RBPF_grid_ICPbased_malaga.ini
/usr/share/mrpt/config_files/rbpf-slam/gridmapping_intel.ini
/usr/share/mrpt/config_files/rbpf-slam/gridmapping_optimal_sampling.ini
/usr/share/mrpt/config_files/ro-localization/
/usr/share/mrpt/config_files/ro-localization/UWB_localization_demo.ini
/usr/share/mrpt/config_files/simul-beacons/
/usr/share/mrpt/config_files/simul-beacons/example_simul-beacons.ini
/usr/share/mrpt/config_files/simul-landmarks/
/usr/share/mrpt/config_files/simul-landmarks/simul_landmarks_demo_EKF-SLAM.ini
/usr/share/mrpt/config_files/simul-landmarks/simul_landmarks_demo_EKF-SLAM_in_6D.ini
/usr/share/mrpt/config_files/simul-landmarks/simul_landmarks_demo_EKF-SLAM_in_6D_datassoc.ini
/usr/share/mrpt/config_files/simul-landmarks/simul_landmarks_demo_EKF-SLAM_in_6D_noncenteredSensor.ini