I am creating a bash script for automatically pulling the newest container images from Nvidia NGC .

NUM=4

for i in $(seq 0 $NUM); do

    yymm=$(date -d "$i months ago" +"%y.%m")

    # -- Tensorflow
    if [ ! -f "tensorflow/tensorflow_$yymm.sif" ]; then
        srun singularity pull tensorflow/tensorflow_$yymm.sif docker://nvcr.io/nvidia/tensorflow:$yymm-tf2-py3 || true
    fi

    # -- Pytorch
    if [ ! -f "pytorch/pytorch_$yymm.sif" ]; then
        srun singularity pull pytorch/pytorch_$yymm.sif docker://nvcr.io/nvidia/pytorch:$yymm-py3 || true
    fi

done

This works, but what I would like to implement is a solution that checks if the container image actually exists on the remote server before attempting to pull.

A simple ping nvcr.io/nvidia/pytorch:24.06-py3 returns Name or service not known.

I am attempting to check if a container image exists on a remote server.