If you have a limited disk space on your server so you want to set a quota for each file system, then user will not able to use the more disk space that assigned space.
Follow the below procedure so set or enable the quota for JFS filesystem
1.Edit /etc/filesystems and edit in quota=userquota on the relevant filesystem.
2.test-root> chfs -a “quota = userquota” /expertisenpuru
3.test-root> quotaon /expertisenpuru
4.test-root> quotacheck /expertisenpuru
Thats it 
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