Table of Contents

1. Challenge

   Create the app Group as Well as appuser1 and appuser2, and Set the app Group as the Primary Group for Both Users

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

2. Challenge

   Create a Filesystem on One of the 2 GB Drives Configured on the System

   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
   

3. Challenge

   Create the Directory for the Mount Point and Change the Group to app

   # mkdir /app
   

4. Challenge

   Configure /etc/fstab with the UUID of /dev/xvdb1, Mount the Filesystem, and change the group of the filesystem to 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
   

5. Challenge

   Install the quota Package, Create the Quota Files for the /app Filesystem, and Generate the Table of Current Disk Usage for Each Filesystem

   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
   

6. Challenge

   Assign a Soft Quota of 512 KB and a Hard Quota of 1M (1024KB) to the app Group, Then Turn Quotas on and Check the Group Quota Configuration for /app

   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