For yolo_v3 retraining from checkpoint, similar command is as below which is mentioned in jupyter notebook,
print(“To resume from checkpoint, please uncomment and run this instead. Change last two arguments accordingly.”)
!tlt-train yolo -e $SPECS_DIR/yolo_train_resnet18_kitti.txt
-r $USER_EXPERIMENT_DIR/experiment_dir_unpruned
-k $KEY
-m $USER_EXPERIMENT_DIR/experiment_dir_unpruned/weights/yolo_resnet18_epoch_001.tlt
–gpus 1
–initial_epoch 2