Overview of disks in Linux

Linux displays devices such as disk and partition drives as files

/DEV/SDA5

/ Dev store directory for device files

SD represents a USB, Stata, SCSI, SAS interface disk device

a table Try the first hard drive the second one is B

5 table Test First logical partition 1 2 3 4 represent four primary partitions respectively

EXT4: fourth-generation extended file system for data storage

Swap: swap file system that acts like virtual memory

You can use the fdisk partitioning tool to manage partitions in Linux

Disk quota Quota

Administrators can limit the amount of disk space a user can use, and each user can only use disk space in the maximum quota range.

Limits on the number of files a user stores

Restrictions on the size of the user store file

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1. Mount the option to add support quotas to the file system at the same time

/dev/sdb1/mnt/quota ext4 Defaults,usrquota,grpquota 0 0

2. Generate quota files in the partition Quota.user and Quota.group

Quotacheck-augcv

-A Scan all quota-supported partitions

- u Scan Disk calculates the number of files occupied by the user

- G number of files occupied by the scan disk calculation group

- C Create quota files Aquota.user and Aquota.group

3. Set up quota information for users

Edquota-u User1 Edit User user1 quota letter

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Maximum peak capacity Peak node

4. Turn on/off quota function

Quotaon/quotaoff

Quotaon-a

-a means to turn on the support quota feature for all partitions

Viewing quota information

Quota-u User Name Only view quota information for users

QUOTA-G group name Only view quota information for a group

Repquota Device viewing quota information within a device

Overview of disks in Linux