RH124 - ch15s04

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.

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Red Hat System Administration I (RH124)

Haley_Ruccio

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The first of two courses covering the core system administration tasks needed to manage Red Hat Enterprise Linux serversRed Hat System Administration I (RH124) is designed for IT professionals without previous Linux system administration experience. The course provides students with Linux administration competence by focusing on core administration tasks. This course also provides a foundation for students who plan to become full-time Linux system administrators by introducing key command-line concepts and enterprise-level tools. This course is the first of a two-course series that takes a computer professional without Linux system administration knowledge to become a fully capable Linux administrator. These concepts are further developed in the follow-on course, Red Hat System Administration II (RH134).This course is based on Red Hat® Enterprise Linux 9.0.Course content summaryIntroduce Linux and the Red Hat Enterprise Linux ecosystem.Run commands and view shell environments.Manage, organize, and secure files.Manage users, groups and user security policies.Control and monitor systemd services.Configure remote access using the web console and SSH.Configure network interfaces and settings.Manage software using DNFAudience for this courseThe primary persona is a technical professional with current or pending responsibilities as a Linux enterprise or cloud system administrator.This course is popular in Red Hat Academy, and is targeted at the student who is planning to become a technical professional using Linux.Prerequisites for this courseBasic technical user skills with computer applications on some operating systems are expected.Take our free assessment to gauge whether this offering is the best fit for your skills.Technology considerationsThere are no special technical requirements for this course.This course is not designed for bring your own device (BYOD).Internet access is not required but is recommended so that students can research and browse Red Hat online resources.

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