RH199 - ch08s02

From workstation, run the lab fs-mount start command. The command runs a start script that determines if the host, servera, is reachable on the network. The script also creates a partition on the second disk attached to servera.

[student@workstation ~]$ lab fs-mount start

Use the ssh command to log in to servera as the student user.

[student@workstation ~]$ ssh student@servera
...output omitted...
[student@servera ~]$

A new partition with a file system has been added to the second disk (/dev/vdb) on servera. Mount the newly available partition by UUID at the newly created mount point /mnt/newspace.

Use the sudo -i command to switch to root, as only the root user can manually mount a device.

[student@servera ~]$ sudo -i
[sudo] password for student: student
[root@servera ~]#

Create the /mnt/newspace directory.
```
[root@servera ~]# mkdir /mnt/newspace
```

Use the lsblk command with the -fp option to discover the UUID of the device, /dev/vdb1.

[root@servera ~]# lsblk -fp /dev/vdb
NAME        FSTYPE LABEL UUID                                 MOUNTPOINT
/dev/vdb                                                      
└─/dev/vdb1 xfs          a04c511a-b805-4ec2-981f-42d190fc9a65

Mount the file system by using UUID on the /mnt/newspace directory. Replace the UUID with that of the /dev/vdb1 disk from the previous command output.
```
[root@servera ~]# mount \
UUID="a04c511a-b805-4ec2-981f-42d190fc9a65" /mnt/newspace
```

Verify that the /dev/vdb1 device is mounted on the /mnt/newspace directory.

[root@servera ~]# lsblk -fp /dev/vdb
NAME        FSTYPE LABEL UUID                                 MOUNTPOINT
/dev/vdb                                                      
└─/dev/vdb1 xfs          a04c511a-b805-4ec2-981f-42d190fc9a65 /mnt/newspace

Change to the /mnt/newspace directory and create a new directory, /mnt/newspace/newdir, with an empty file, /mnt/newspace/newdir/newfile.
1. Change to the /mnt/newspace directory.
```
[root@servera ~]# cd /mnt/newspace
```
2. Create a new directory, /mnt/newspace/newdir.
```
[root@servera newspace]# mkdir newdir
```
3. Create a new empty file, /mnt/newspace/newdir/newfile.
```
[root@servera newspace]# touch newdir/newfile
```
Unmount the file system mounted on the /mnt/newspace directory.
1. Use the umount command to unmount /mnt/newspace while the current directory on the shell is still /mnt/newspace. The umount command fails to unmount the device.
```
[root@servera newspace]# umount /mnt/newspace
umount: /mnt/newspace: target is busy.
```
2. Change the current directory on the shell to /root.
```
[root@servera newspace]# cd
[root@servera ~]# 
```
3. Now, successfully unmount /mnt/newspace.
```
[root@servera ~]# umount /mnt/newspace
```

Exit from servera.

[root@servera ~]# exit
logout
[student@servera ~]$ exit
logout
Connection to servera closed.
[student@workstation]$

Finish

On workstation, run the lab fs-mount finish script to complete this exercise.

[student@workstation ~]$ lab fs-mount finish

This concludes the guided exercise.

Revision: rh199-8.2-3beeb12