first list your docker volume and get volumn name
sudo docker volume ls
backup
#sudo backup_docker_volume.sh <volumn_name> <tar_file>
sudo bash ./backup_docker_volume.sh codimd_database-data backup1.tar
restore
#sudo restore_docker_volume.sh <volumn_name> <tar_file>
sudo bash ./restore_docker_volume.sh codimd_database-data backup1.tar