UNIX for Dummies Questions & Answers

Hi,
I'm practicing new things with Linux/Unix and I need someone to point me at the right direction.
Lets say I create a user named user1. After creating it, how would I enable quotas for it. I have already added "userquota" under "/etc/fstab" and rebooted my system, but after I run the command "quotacheck -avug" I get the following:
~]# quotacheck -avug
quotacheck: Your kernel probably supports journaled quota but you are not using it. Consider switching to journaled quota to avoid running quotacheck after an unclean shutdown.
quotacheck: Quota for users is enabled on mountpoint / so quotacheck might damage the file.
Please turn quotas off or use -f to force checking.

I tired enabling usrquota on root and /home to see if i get something different but same message. I also tried mount -o remount /home which didnt game me any errors but didn't really help either. I would appreciate your feedback.

Thanks in Advance

I have heard that quota makes for a slow start after an uncontrolled shutdown/crash, as the quota is reverified, so I am not surprised it is a bad idea on root /. To harden a system against space grabbers, make sure the root device has not all writable directories, or directories owned by user class group and user ids. Where they can write, quota is one way to control them. Watch out for /var/tmp and /tmp! There are several nice tutorials on the right steps in the right order, like: Linux Quota Tutorial