The quotaon command is used to turn quotas on for a filesystem. Normally when the system is booted, it will turn on quotas automatically. However, you may turn off quotas by executing the quotaoff command followed by the name of the filesystem (the following commands must be executed by the root user):
[root@localhost ~]$ quotaoff /dev/sdb1 [root@localhost ~]$ quotaon /dev/sdb1
Quotaon command options are:
| Options | Function |
| -a, –all | Turn on quotas for all autoloading filesystems in /etc/fstab that support them. |
| -f, –off | Invoke quotaoff instead of quotaon. |
| -F format, –format=format | Check quota files for the specified format. |
| -g, –group | Turn group quotas on. |
| -p, –print-state | Print current quota status, then exit. |
| -u, –user | Turn user quotas on. |
| -v, –verbose | Print a message for each filesystem affected by the command. |
How to Manually Configure quota on a Filesystem
Manual configuration of quotas involves changing entries in your system’s file system table, /etc/fstab, to add the usrquota mount option to the desired portion of your file system. As an example in a simple file system, you can enable quota management like this:
LABEL=/ / ext4 defaults,usrquota 1 1
Examples of using quotaon command
1. To turn the quota on:
# quotaon
2. To turn the quota on for a file system:
# quotaon -a # quotaon --all
3. To turn the quota on for a user:
# quotaon -u mike # quotaon --user mike
4. To turn the quota on for a group:
# quotaon -g SUPPORT # quotaon --group SUPPORT
5. To print the quota state:
# quotaon -p # quotaon --print-state
6. To run in verbose mode:
# quotaon -v # quotaon --verbose