How can I access my Lustre data from outside DKRZ/ZMAW?

For data transfer you can use either sftp:

$ sftp <user>@mistral.dkrz.de

or  rsync command:

$ rsync -atv <user>@mistral.dkrz.de:/path/to/data/on/mistral /local/path

Can I run cron jobs on HPC login nodes?   How can I check my disk space usage?