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This article mainly introduces the example analysis of linux disk quota, which is very detailed and has certain reference value. Friends who are interested must finish it!

1. Quotas, also known as quotas, are for partitions, neither users nor files, let alone the entire hard disk.

two。 The kernel version must be 2.4 or higher to support it; check to see if the kernel supports quotas.

3.root is not subject to quota restrictions, only ordinary users are restricted.

4. Terms in quotas:

Soft limit: warning limit, which can be broken

Hard limit: maximum available limit, unbreakable

Quota size: in size K and in the number of files

Quota grace date: the grace time for reducing the hard limit back to the soft limit

5. Quotas can be set for users or groups, called:

User quota: usrquota

Set quotas for a single user

Group quota: grpquota

Set quotas for all members of the entire group

6. Configuration steps for quotas:

# vi / etc/fstab # File systems and partitions that need to be mounted when the system starts up

Enable the quota feature when the / home partition is mounted, and modify as follows:

# mount-o remount / home # re-unmount and mount the partition used as quota

# cat / etc/mtab # check whether disk quotas are enabled for mounted partitions

Note: / etc/mtab this file is the partition that has been mounted after the system boot.

Quota detection: detects quotas in the system, creates quota files under the partition and writes system quota information

# useradd us1

# quotacheck-cavug

# ll / home # check whether / home produces two quota database files

Edit the quota size for a user or group

# edquota-u us1

# edquota-g us1

View user and group quota report

# repquota-a

# repquota-ag

Enable quota featur

# quotaon-avug

Test the user's quota

# su-us1 / / switch normal user test user quota

$cp / bin/* / home/us1 / / copy files to test the effect of quota limits

# repquota-a / / View quota report

Check the used size of the current directory

# du-h

Modify the grace time of the quota (for the entire partition, the time unit can be days, hours, minutes, seconds)

# edquota-t

Quota replication (multiple target users can be specified at the same time)

# edquota-p us1 us2 us3 us4 us5

The above is all the contents of the article "sample Analysis of linux disk quotas". Thank you for reading! Hope to share the content to help you, more related knowledge, welcome to follow the industry information channel!

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