RH134 - ch01s02

On workstation, run the lab console-write start command. This command runs a start script that determines if the servera machine is reachable on the network. The script will alert you if it is not available. It also installs the vim-enhanced package if needed.

[student@workstation ~]$ lab console-write start

From workstation, open an SSH session to servera as student. The systems are configured to use SSH keys for authentication, therefore a password is not required.
```
[student@workstation ~]$ ssh student@servera
...output omitted...
[student@servera ~]$ 
```

Create and execute a simple Bash script.

Use the vim text editor to create a new text file under your home directory, and name it firstscript.sh
```
[student@servera ~]$ vim firstscript.sh
```

Insert the following text, and save the file. Note that the number of hash signs (#) is arbitrary.

#!/bin/bash
echo "This is my first bash script" > ~/output.txt
echo "" >> ~/output.txt
echo "#####################################################" >> ~/output.txt

Use the sh command to execute the script.
```
[student@servera ~]$ sh firstscript.sh
```

Review the output file generated by the script.

[student@servera ~]$ cat output.txt
This is my first bash script

#####################################################

Add more commands to the firstscript.sh script, execute it, and review the output.

Use the vim text editor to edit firstscript.sh
```
[student@servera ~]$ vim firstscript.sh
```

Append the following lines in bold to the firstscript.sh file.

#!/bin/bash
#
echo "This is my first bash script" > ~/output.txt
echo "" >> ~/output.txt
echo "#####################################################" >> ~/output.txt
echo "LIST BLOCK DEVICES" >> ~/output.txt
echo "" >> ~/output.txt
lsblk >> ~/output.txt
echo "" >> ~/output.txt
echo "#####################################################" >> ~/output.txt
echo "FILESYSTEM FREE SPACE STATUS" >> ~/output.txt
echo "" >> ~/output.txt
df -h >> ~/output.txt
echo "#####################################################" >> ~/output.txt

Make the firstscript.sh file executable using the chmod command.
```
[student@servera ~]$ chmod a+x firstscript.sh
```
Execute the firstscript.sh script.
```
[student@servera ~]$ ./firstscript.sh
```

Review the output file generated by the script.

[student@servera ~]$ cat output.txt
This is my first bash script

#####################################################
LIST BLOCK DEVICES

NAME   MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sr0     11:0    1 1024M  0 rom
vda    252:0    0   10G  0 disk
└─vda1 252:1    0   10G  0 part /
vdb    252:16   0    5G  0 disk

#####################################################
FILESYSTEM FREE SPACE STATUS

Filesystem      Size  Used Avail Use% Mounted on
devtmpfs        892M     0  892M   0% /dev
tmpfs           915M     0  915M   0% /dev/shm
tmpfs           915M   17M  899M   2% /run
tmpfs           915M     0  915M   0% /sys/fs/cgroup
/dev/vda1        10G  1.5G  8.6G  15% /
tmpfs           183M     0  183M   0% /run/user/1000
#####################################################

Remove the exercise files and log off from servera.

Delete the script file firstscript.sh and output file output.txt.
```
[student@servera ~]$ rm firstscript.sh output.txt
```

Log off from servera.

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

Finish

On workstation, run the lab console-write finish script to complete this exercise.

[student@workstation ~]$ lab console-write 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.

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