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quotaon - Enable Quotas
The quotaon command is used to enable disk quotas on a file system. It creates the "quota.user" and "quota.group" files in the file system, which store information about quotas for individual users and groups.
The syntax of the quotaon command is: quotaon [OPTIONS].
Common options include:
-a: Enable quotas on all file systems that have quotas configured in "/etc/fstab."
-g: Enable quotas on the file system for a specified group.
-p: Display whether quotas are currently enabled.
-u: Enable quotas on the file system for a specified user.
For example:
# quotaon -a←Enable quotas on all file systems with quotas configured in /etc/fstab
# quotaon -u /home←Enable quotas for users under the /home file system (groups are not enabled)
For more examples and explanations, refer to the provided link.