RH134 - ch02s04

The following commands assume a start time provided by the lab grep script of April 1 15:53.
Check the current time so we know not only the starting time, but the ending time of the messages we are looking for.
```
[root@serverX ~]# date
Tue Apr  1 15:54:55 EDT 2014
```

[root@serverX ~]# grep '^Apr  1 15:5[34]' /var/log/messages
Apr  1 15:53:25 serverX ima_daemon[14847]: logging ACCESS: 927265f3c0e95f4ae6294451060d0717
Apr  1 15:53:25 serverX ima_daemon[14848]: logging ACCESS: b4866e8f2ec0058abe1dc0a142e0b737
Apr  1 15:53:25 serverX ima_daemon[14849]: logging ACCESS: 7afa51b31aabca065dd358cc475d8863
... Output Truncated ...

Modify your regular expression to locate the first ERROR message.

[root@serverX ~]# grep '^Apr  1 15:5[34].*ERROR' /var/log/messages | head -n 1
Apr  1 15:53:30 serverX database[14877]: bad entry ERROR: 2e28564860d5c6e5151a31fd923c7b61 invalid

Log messages are generated by applications. There is no adopted standard on what keywords or information should be provided as part of a log message.
Using an option to grep, look for all logs after the start time that contain the word ERROR, ignoring the case of the regular expression.
1. ```
[root@serverX ~]# grep -i '^Apr  1 15:5[34].*ERROR' /var/log/messages
```
Use the -v option with grep, as well as a regular expression, to locate the ERROR message that does not contain a checksum in its message body.
1. In this situation, it may be useful to use one grep and regular expression to meet some of the criteria, and another to further filter the results to get the desired content.
```
[root@serverX ~]# grep '^Apr  1 15:5[34].*ERROR' /var/log/messages | grep -v '[a-z0-9]\{32\}'
```

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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: rh134-7-c643331