RH134 - ch05s02

On workstation, run the lab selinux-opsmode start command. This command runs a start script that determines if the servera machine is reachable on the network.

[student@workstation ~]$ lab selinux-opsmode start

Use the ssh command to log in to servera as the student user. The systems are configured to use SSH keys for authentication, so a password is not required.
```
[student@workstation ~]$ ssh student@servera
...output omitted...
[student@servera ~]$  
```
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 ~]# 
```
Change the default SELinux mode to permissive and reboot.
1. Use the getenforce command to verify that servera is in enforcing mode.
```
[root@servera ~]# getenforce
Enforcing 
```
2. Use the vim command to open the /etc/selinux/config configuration file. Change the SELINUX parameter from enforcing to permissive.
```
[root@servera ~]# vim /etc/selinux/config
```
3. Use the grep command to confirm that the SELINUX parameter is set to permissive.
```
[root@servera ~]# grep '^SELINUX' /etc/selinux/config
SELINUX=permissive
SELINUXTYPE=targeted 
```
4. Use the systemctl reboot command to reboot servera.
```
[root@servera ~]# systemctl reboot
Connection to servera closed by remote host.
Connection to servera closed.
[student@workstation ~]$  
```
servera takes a few minutes to reboot. After a few minutes, log in to servera as the student user. Use the sudo -i command to become root. Display the current SELinux mode using the getenforce command.
1. From workstation using the ssh command log in to servera as the student user.
```
[student@workstation ~]$ ssh student@servera
...output omitted...
[student@servera ~]$ 
```
2. Use the sudo -i command to become root.
```
[student@servera ~]$ sudo -i
[sudo] password for student: student
[root@servera ~]# 
```
3. Display the current SELinux mode using the getenforce command.
```
[root@servera ~]# getenforce
Permissive 
```
In the /etc/selinux/config file, change the default SELinux mode to enforcing. This change only takes effect on next reboot.
1. Use the vim command to open the /etc/selinux/config configuration file. Change the SELINUX back to enforcing.
```
[root@servera ~]# vim /etc/selinux/config
```
2. Use the grep command to confirm that the SELINUX parameter is set to enforcing.
```
[root@servera ~]# grep '^SELINUX' /etc/selinux/config
SELINUX=enforcing
SELINUXTYPE=targeted 
```
Use the setenforce command to set the current SELinux mode to enforcing without rebooting. Confirm that the mode has been set to enforcing using the getenforce command.
```
[root@servera ~]# setenforce 1
[root@servera ~]# getenforce
Enforcing
```

Exit from servera.

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

Finish

On workstation, run the lab selinux-opsmode finish script to complete this exercise.

[student@workstation ~]$ lab selinux-opsmode finish

This concludes the guided exercise.

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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.

Welcome to the Red Hat System Administration II (RH134) group in the Red Hat Learning Community!

Deanna

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