The files can be found at The O-GlcNAc Database (https://www.oglcnac.mcw.edu)

Steps:
1. Nevigate to https://www.oglcnac.mcw.edu/download - and select "Download O-GlcNAc reference datasets"

2. Next, Select each species Homo sapiens, Mus musculus, Rattus norvegicus, Drosophila melanogaster, and Saccharomyces cerevisae. Select CSV as download format

3. Download files to your local computer and use scp command to the corrsponding folder on glygen server

4. Run command to change ownership and permission:
cd /data/project/glygen/downloads/mcw_oglcnac/
chmod -R 775

5. Remove the old directory and create a new symbolic link to the newly downloads:
cd /data/projects/glygen/downloads/mcw_oglcnac/
rm current
ln -s $version current

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Alternatively, run bash script which was created to automates all above steps

- Go to /data/project/glygen/downloads/download_scripts/
- Run O-GlcNAc bash script:
bash download_mcw_oglcnac.sh
- Check to see if O-GlcNAc data has been downloaded, and whether the symbolic link and current directory were created successfully