Linux User Management: Configuring Group Disk Quotas

# groupadd app
# useradd -g appuser1
# useradd -g app appuser2

Check to see what disks are available:

# lsblk

Create a partition on the /dev/xvdb disk:

# fdisk /dev/xvdb
Welcome to fdisk (util-linux 2.23.2).

Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.

Device does not contain a recognized partition table
Building a new DOS disklabel with disk identifier 0xb3c6ea84.

Command (m for help): n
Partition type:
  p   primary (0 primary, 0 extended, 4 free)
  e   extended
Select (default p): p
Partition number (1-4, default 1):
First sector (2048-4194303, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-4194303, default 4194303):
Using default value 4194303
Partition 1 of type Linux and of size 2 GiB is set

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.

Run the partprobe command to ensure the partition table has been updated:

# partprobe

Create an ext4 filesystem on the /dev/xvdb1 partition:

# mkfs -t ext4 /dev/xvdb1

# mkdir /app

Get the UUID for /dev/xvdb1:

# blkid /dev/xvdb1
/dev/xvdb1: UUID="d6a5691b-a045-463f-bf2b-74d0c71895e2" TYPE="ext4"

Paste the UUID into the /etc/fstab file with the following options:

# vim /etc/fstab
UUID=d6a5691b-a045-463f-bf2b-74d0c71895e2       /app    ext4    defaults,grpquota       1       2

Mount newly added filesytems configured in /etc/fstab:

# mount -a

Change the group of the /app filesystem to app:

# chgrp app /app

Install the quota package:

yum install -y quota

Create the quota files for the /app filesystem:

quotacheck -cug /app

Generate the table of current disk usage per filesystem:

quotacheck -avug

Assign a soft quota of 512 KB and a hard quota of 1M (1024KB) to the app group:

$ edquota -g app
Disk quotas for group app (gid 1004):
  Filesystem                   blocks       soft       hard     inodes     soft     hard
  /dev/xvdb1                        4        512       1024          1        0        0

Turn quotas on for the filesystem:

$ quotaon -vug /app

Verify the group quota configuration for /app:

$ repquota -g /app
*** Report for group quotas on device /dev/xvdb1
Block grace time: 7days; Inode grace time: 7days
                        Block limits                File limits
Group           used    soft    hard  grace    used  soft  hard  grace
----------------------------------------------------------------------
root      --      16       0       0              1     0     0       
app       --       4     512    1024              1     0     0