The idea behind the Quota check is that the users are forced to stay under the disk consumption limit taking away their ability to consume unlimited disk space on a system.
Step 1) vi /etc/fstab
Partitions that you have not yet enabled quota normally look something like:
/dev/hda1 / ext2 defaults 1 1
/dev/hda2 /home ext2 defaults 1 1
To enable user quota support on a file system, add "usrquota" to the fourth field containing the word
/dev/hda1 / ext2 defaults 1 1
/dev/hda2 /home ext2 defaults,usrquota 1 1
Replace "usrquota" with "grpquota", should you need group quota support on a file system.
Step 2) Remount the File System to Enable Quota Support
# mount -o remount /home
Step 3)Initialize the new Quota Data Base
# quotacheck -c /home
Then a file named aquota.usr is created in the home directory
Step 4)Start the assigned quota by
#quotaon /home
To off the Quota--- #quotaoff /home
Step 5)The user policies can be implemented by editing the Quota File
#edquota -u username
/dev/hda3: blocks in use: 2594, limits (soft = 5000, hard = 6500)
inodes in use: 356, limits (soft = 1000, hard = 1500)
Block in use-Used Space
Soft-Get Warning(The size reaches a particular point it shows warning)
Hard-Maximum Limit(Quota Exceeding Size)
inode-No of Files
For Checking the status of user Quota# repquota −a
For Checking the QuotaStep 1)Switch to that user
# su - username
Step2)Create files in this home directory
#dd if=/dev/zero of=filename bs=1024 count=50
{Here 50 Kb is allocated to that directory...By giving more size you can check this}
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