# Overview

All simulation data products can be browsed at http://nbody.rc.fas.harvard.edu/public/AbacusCosmos/.

You’ll probably want to use a utility like wget or curl to recursively download the catalogs. The following tool will help you build a wget command to download the desired files.

We would like to thank Harvard Research Computing for their assistance in hosting the catalogs. If the website above is inaccessible, please check the RC status page for outage information: http://fasrc.us.

# Extracting data products

The larger data products (halos and particles) are stored in compressed formats (*.tar.gz files) to save disk space and reduce file transfer time. You will probably need to decompress them to perform analyses. Use the command

tar -xzvf file_to_decompress.tar.gz


in each directory that contains a tarball.

To automate this process on a whole directory tree, the Unix find command may be useful:

find directory_tree_root -type f -name '*.tar.gz' -execdir tar -xzf {} \;


To save disk space, you can add -delete to that command to remove the tar file after extraction.