Tamir Suliman - LinuxVaults

Rsyslog Project . Using imkafka

Connect Rsyslog with Kafka One of these modules is the imkafka module, which enables Rsyslog to receive log messages from Apache Kafka.

EX342

14. Authentication Issues -EX342

Disclaimer: These are my notes following my self-study on troubleshooting . No material comes from either Red Hat course or the Red Hat exam. You will not find any NDA information here. All contents are my own thoughts/understanding on the subject matter. * * * Identify and fix authentication issues * Identify and fix

RHCE on RHEL8

3.RHCSA Tasks for RHCE - EX294 RHEL8/CentOS8

The RedHat Objectives published at https://www.redhat.com/en/services/training/ex294-red-hat-certified-engineer-rhce-exam-red-hat-enterprise-linux-8?section=Objectives * Understand and use essential tools System Documentation Linux documentation is your friend during the exam some of the commands you can use to view the documentation : 1. MAN 2. INFO 3. * Operate running systems * Configure

RHEL7

Linux Q &A

OpenShift

9. Exam Preparation and Tips

Use your time wisely Use the help resources and the documentation provided Look for command examples on the documenation

RHCS in OpenShift Administration

8. Redhat Openshift Q&A

OpenShift Online 3 Questions and AnswersGet answers to some of the most frequent questions about OpenShift Online 3 that we’ve noticed in ticket-based technical support, Stack Overflow questions, and in discussions with customers over the pJiri Fiala

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7. Configure cluster scaling

Manually control the number of cluster workers To view the machinesets ( group of machines) $ oc get machinesets -n openshift-machine-api To Manually scale machineset option 1 specify the number of replicas $ oc scale --replicas=2 machineset (oooooo) -n openshift-machine-api $ oc get nodes To manually scale the machineset option 2 by editing

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6. Configure pod scheduling

Limit resource usage Resournce Quota definition $ oc create -f filename -n projectname $ oc create quota $ oc get quota Scale applications to meet increased demand Control pod placement across cluster nodes

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5.Configure networking components

Troubleshoot software defined networking Create and edit external routes Control cluster network ingress Create a self signed certificate Secure routes using TLS certificates

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4.Control access to resources

Define role-based access controls Apply permissions to users Create and apply secrets to manage sensitive information Create service accounts and apply permissions using security context constraints

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3. Manage users & Policies

Configure the HTPasswd identity provider for authentication Create or update your htpasswd file $ htpasswd -c -B -b /../..file username password Update credentials $ htpasswd -b /.././file username password $ oc create secret generic htpass-secret --from-file=htpasswd=/../../../file -n openshift-config Create and delete users Modify user passwords Modify user and group permissions Create

RHCS in OpenShift Administration

2. Manage OpenShift Container Platform

Use the command-line interface to manage and configure an OpenShift cluster Use the web console to manage and configure an OpenShift cluster Create and delete projects Import, export, and configure Kubernetes resources Examine resources and cluster status View logs Monitor cluster events and alerts Troubleshoot common cluster events and alerts

RHCS in OpenShift Administration

1. About RHCS in in OpenShift Administration

Login or use your created account to download the openshift packages to your Linux box. Please note that your virtualbox or vmware workstation should be updated with the following settings: 1. Enable processor virtualization 2. Ensure your virtual machine has at least 40 GB disk and 10 GB RAM assigned

RHCE on RHEL8

6. Configure Ansible Managed Nodes - EX294 CentOS8/RHEL8

RHCE on RHEL8

5. Install & Configure Ansible - EX294 CentOS8/RHEL8

Ansible Installation On the ansible.local.com server run the following commands to install ansible. If you going to use YUM command yum install epel-release -y yum install ansible -y if you going to use DNF command dnf install epel-release -y dnf install ansible -y Ansible Configurations

RHCE on RHEL8

4. Ansible Core Components - EX294 CentOS8/RHEL8

RHCE on RHEL8

2. Setup a RHEL8 Lab for RHCE - EX294 RHEL8/CentOS8

STEP 1 Download the CentOS 8 iso file We are going to use CentOS 8 which can be downloaded from the following link: https://www.centos.org/download/ Or if any of these URLs close to your location you can also use it to download the iso file. http://isoredirect.

RHCE on RHEL8

1. About RHCE EXAM- EX294 RHEL8

With the introduction of Red Hat 8 operating system the exam objectives for Red Hat Certified Engineer (RHCE) exam for Red Hat Enterprise Linux 8 are clearly focused on using Ansible automation. The followings are the objectives of the Red Hat Exam EX294 " Red Hat Certified Engineer (RHCE) exam for

Linux Certifications

12. General Troubleshooting Summary Notes and Important Commands-EX342

This section is collected from different sources across the internet and during my study and research of this exam.

RHCS in Linux Diagnostics and Troubleshooting exam

11. Security Issues Troubleshooting-EX342

Disclaimer: These are my notes following my self-study on troubleshooting . No material comes from either Red Hat course or the Red Hat exam. You will not find any NDA information here. All contents are my own thoughts/understanding on the subject matter.

RHCS in Linux Diagnostics and Troubleshooting exam

10. Kernel Issues Troubleshooting-EX342

Gather information to aid third party investigation of issues * Create kernel crashdumps * Compile and execute SystemTap modules Generally speaking to compile a stap module there are different examples on the web you can download to test. stap -v stapexample.stp * Generate sos reports According to the Linux man page sosreport

RHCS in Linux Diagnostics and Troubleshooting exam

9. Application Issues troubleshooting-EX342

Disclaimer: These are my notes following my self-study on troubleshooting . No material comes from either Red Hat course or the Red Hat exam. You will not find any NDA information here. All contents are my own thoughts/understanding on the subject matter. * Identify library dependencies for third-party software * Identify if

RHCS in Linux Diagnostics and Troubleshooting exam

8. RPM Issues Troubleshooting

RHCS in Linux Diagnostics and Troubleshooting exam

7. Network Issues Troubleshooting-EX342

Disclaimer: These are my notes following my self-study on troubleshooting . No material comes from either Red Hat course or the Red Hat exam. You will not find any NDA information here. All contents are my own thoughts/understanding on the subject matter.

RHCS in Linux Diagnostics and Troubleshooting exam