Enable Quota on Linux

In our OSCAR cluster I only activated userquota for /, that's probably the most straight-forward thing to do. Basically you just need to do:

1. google://linux quota
2. Append usrquota option to the /etc/fstab for /
3. mount -o remount /
4. quotacheck -acum /
5. Add this file to /etc/cron.daily (remember to check the executable permission.):

   #!/bin/sh
   quotaoff -aug
   quotacheck -augm
   quotaon -aug
   

6. Use edquota -e mjhsieh to edit the quota setting for account name mjhsieh