RH134 - ch09s02

Test an NFS Server using the mount command.
Configure NFS Shares in the /etc/fstab configuration file to save changes even after a system reboots.

On workstation, run the lab netstorage-nfs start command. This command runs a start script that determines if the servera and serverb machines are reachable on the network. The script will alert you if they are not available. The start script configures serverb as an NFSv4 Server, sets up permissions, and exports directories. It creates users and groups needed on both servera and serverb.

[student@workstation ~]$ lab netstorage-nfs start

A shipping company uses a central server, serverb, to host a number of shared documents and directories. Users on servera, who are all members of the admin group, need access to the persistently mounted NFS share.

Important information:

serverb shares the /shares/public directory, which contains some text files.
Members of the admin group (admin1, sysmanager1) have read and write access to the /shares/public shared directory.
The principle mount point for servera is /public.
All user passwords are set to redhat.

Log in to servera as the student user and switch to the root user.
1. Log in to servera as the student user.
```
[student@workstation ~]$ ssh student@servera
...output omitted...
[student@servera ~]$ 
```
2. Use the sudo -i command to switch to the root user. The password for the student user is student.
```
[student@servera ~]$ sudo -i
[sudo] password for student: student
[root@servera ~]# 
```

Test the NFS server on serverb using servera as the NFS client.

Create the mount point /public on servera.
```
[root@servera ~]# mkdir /public
```
On servera, use the mount command to verify that the /share/public NFS share exported by serverb mounts correctly on the /public mount point.
```
[root@servera ~]# mount -t nfs \
serverb.lab.example.com:/shares/public /public
```

List the contents of the mounted NFS share.

[root@servera ~]# ls -l /public
total 16
-rw-r--r--. 1 root admin 42 Apr  8 22:36 Delivered.txt
-rw-r--r--. 1 root admin 46 Apr  8 22:36 NOTES.txt
-rw-r--r--. 1 root admin 20 Apr  8 22:36 README.txt
-rw-r--r--. 1 root admin 27 Apr  8 22:36 Trackings.txt

Explore the mount command options for the NFS mounted share.

[root@servera ~]# mount | grep public
serverb.lab.example.com:/shares/public on /public type nfs4
(rw,relatime,vers=4.2,rsize=262144,wsize=262144,namlen=255,sync
,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=172.25.250.10,
local_lock=none,addr=172.25.250.11)

Unmount the NFS share.
```
[root@servera ~]# umount /public
```

Configure servera to ensure that the share used above is persistently mounted.

Open the /etc/fstab file for editing.

[root@servera ~]# vim /etc/fstab

Add the following line to the end of the file:

serverb.lab.example.com:/shares/public  /public  nfs  rw,sync  0 0

Use the mount command to mount the shared directory.
```
[root@servera ~]# mount /public
```

List the contents of the shared directory.

[root@servera ~]# ls -l /public
total 16
-rw-r--r--. 1 root   admin 42 Apr  8 22:36 Delivered.txt
-rw-r--r--. 1 root   admin 46 Apr  8 22:36 NOTES.txt
-rw-r--r--. 1 root   admin 20 Apr  8 22:36 README.txt
-rw-r--r--. 1 root   admin 27 Apr  8 22:36 Trackings.txt

Reboot the servera machine.
```
[root@servera ~]# systemctl reboot
```

After servera has finished rebooting, log in to servera as the admin1 user and test the persistently mounted NFS share.

[student@workstation ~]$ ssh admin1@servera
[admin1@servera ~]$

Test the NFS share mounted on /public

[admin1@servera ~]$ ls -l /public
total 16
-rw-r--r--. 1 root   admin 42 Apr  8 22:36 Delivered.txt
-rw-r--r--. 1 root   admin 46 Apr  8 22:36 NOTES.txt
-rw-r--r--. 1 root   admin 20 Apr  8 22:36 README.txt
-rw-r--r--. 1 root   admin 27 Apr  8 22:36 Trackings.txt
[admin1@servera ~]$ cat /public/NOTES.txt
###In this file you can log all your notes###
[admin1@servera ~]$ echo "This is a test" > /public/Test.txt
[admin1@servera ~]$ cat /public/Test.txt
This is a test

Log off from servera.

[admin1@servera ~]$ exit
logout
Connection to servera closed.

Finish

On workstation, run the lab netstorage-nfs finish script to complete this exercise.

[student@workstation ~]$ lab netstorage-nfs finish

This concludes the guided exercise.

Discuss Red Hat System Administration II

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Is It possible to reset root password when the system is on multi-user.target?

jennifer1987

27 lip 2023

Hi thereWell, i have a question, Is It possible to reset root password when the system is on multi-user.target? I was not be able to found a foro o some information related with this and another question that I have, If the grub menu dont show up, is it posible to reset the root password?

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Red Hat System Administration II (RH134)

Haley_Ruccio

21 lip 2023

Build the skills to perform the key tasks needed to become a full-time Linux administratorRed Hat System Administration II (RH134) is the second part of the RHCSA training track for IT professionals who have already attended Red Hat System Administration I. The course goes deeper into core Linux system administration skills in storage configuration and management, installation and deployment of Red Hat Enterprise Linux, management of security features such as SELinux, control of recurring system tasks, management of the boot process and troubleshooting, basic system tuning, and command-line automation and productivity. This course assumes that students have attended Red Hat System Administration I (RH124).Experienced Linux administrators who seek rapid preparation for the RHCSA certification should instead start with RHCSA Rapid Track (RH199).This course is based on Red Hat Enterprise Linux 9.0.Course summaryInstall Red Hat Enterprise Linux using scalable methodsAccess security files, file systems, and networksExecute shell scripting and automation techniquesManage storage devices, logical volumes, and file systemsManage security and system accessControl the boot process and system servicesRun containersAudience for this courseThis course is geared toward Windows system administrators, network administrators, and other system administrators who are interested in supplementing current skills or backstopping other team members, in addition to Linux system administrators who are responsible for these tasks:Configuring, installing, upgrading, and maintaining Linux systems using established standards and proceduresProviding operational supportManaging systems for monitoring system performance and availabilityWriting and deploying scripts for task automation and system administrationRecommended trainingSuccessful completion of Red Hat System Administration I (RH124) is recommended.Experienced Linux administrators seeking to accelerate their path toward becoming a Red Hat Certified System Administrator should start with the RHCSA Rapid Track course (RH199).Take our free assessment to gauge whether this offering is the best fit for your skills.Technology considerationsThere are no special technology requirements.This course is not designed for bring your own device (BYOD).Internet access is not required, but is recommended to allow students to research and access Red Hat online resources.

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18 lip 2023

We are excited to launch a space dedicated to the Red Hat Training course Red Hat System Administration II! To gain the most value from this group - click the "Join Group" button in the upper right hand corner.We encourage group members to collaborate in this group to discuss topics, ask questions, share best practices and tips, provide course feedback, and share their accomplishments as it relates to RH134.Read more about Red Hat System Administration II here.

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Revision: rh134-8.2-f0a9756