7.1.2. Remounting the File Systems
After adding the 
usrquota and/or grpquota options, remount each file system whose fstab entry has been modified. If the file system is not in use by any process, use one of the following methods:- Issue theumountcommand followed by themountcommand to remount the file system.(See themanpage for bothumountandmountfor the specific syntax for mounting and unmounting various filesystem types.)
- Issue themount -o remountcommand (where/homefile system, the command to issue ismount -o remount /home.
If the file system is currently in use, the easiest method for remounting the file system is to reboot the system.
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