Posts by Tag

Note: This is a critical RHCSA 7 exam objective (if you can’t take control of a VM through a reboot at the beginning of the exam, you will fail it entirely).

RHEL7: Locate and interpret system log files and journals

2 minute read

Note: This is an RHCSA 7 exam objective.

RHEL7: Install Red Hat Enterprise Linux systems as virtual guests

1 minute read

Note: This is an RHCSA 7 exam objective.

RHEL7: How to install a MariaDB/MySql service.

6 minute read

Note: This is an RHCE 7 exam objective.

RHEL7: How to install an Apache service.

1 minute read

Installation Procedure

RHEL7: How to get started with GRUB2

4 minute read

Note: This is an RHCSA 7 exam objective.

RHEL7: How to get started with Firewalld

14 minute read

Note: This is an RHCSA 7 exam objective and an RHCE 7 exam objective.

RHEL7: Extend existing unencrypted logical volumes

4 minute read

Note: This is an RHCSA 7 exam objective.

RHEL7: Deploy an Apache basic CGI application.

1 minute read

Note: This is an RHCE 7 exam objective.

RHEL7: Create a simple database schema.

3 minute read

Note: This is an RHCE 7 exam objective.

RHEL7: List, create, delete partitions on MBR and GPT disks

7 minute read

Note: This is an RHCSA 7 exam objective.

RHEL7: Configure systems to boot into a specific target automatically

less than 1 minute read

Note: This is an RHCSA 7 exam objective.

RHEL7: Configure a system to use an existing LDAP directory service for user and group information

1 minute read

Note: This is an RHCSA 7 exam objective.

RHEL7: Configure a system to forward all email to a central mail server.

4 minute read

Note: This is an RHCE 7 exam objective.

RHEL7: Configure a system to authenticate using Kerberos.

2 minute read

Note: This is an RHCE 7 exam objective.

RHEL7: Configure SSH key-based authentication

2 minute read

Note: This is an RHCSA 7 exam objective and an RHCE 7 exam objective.

RHEL7: Configure a master name server.

4 minute read

Presentation

RHEL7: Configure a system as either an iSCSI target or initiator that persistently mounts an iSCSI target.

8 minute read

Note: This is an RHCE 7 exam objective.

RHEL7: Configure IPv4 addresses and perform basic IPv4 troubleshooting

9 minute read

Note: This is an RHCSA 7 exam objective.

RHEL7: Configure a central mail server.

2 minute read

Prerequisites

RHEL7: Configure a caching-only name server.

less than 1 minute read

Note: This is an RHCE 7 exam objective.

RHEL7: Configure an Apache virtual host.

1 minute read

Note: This is an RHCE 7 exam objective.

RHEL7: Configure Apache TLS security.

4 minute read

Note: This is an RHCE 7 exam objective.

RHEL7: Configure Apache access restrictions on directories.

1 minute read

Note: This is an RHCE 7 exam objective. It has been renamed in June 2016 from “Configure private directories” to “Configure access restrictions on directorie...

RHEL7: Configure Apache group-managed content.

less than 1 minute read

Note: This is an RHCE 7 exam objective.

RHEL7: Configure aggregated network links between two RHEL systems.

less than 1 minute read

Note: This is an RHCE 7 exam objective.

RHEL7: Configure additional SSH options described in documentation.

2 minute read

Note: This is an RHCE 7 exam objective.

RHEL7: Boot systems into different targets manually

1 minute read

Note: This is an RHCSA 7 exam objective.

RHEL7: Boot, reboot, and shut down a system normally.

less than 1 minute read

Note: This is an RHCSA 7 exam objective.

RHEL7: Backup and restore a MariaDB database.

2 minute read

Note: This is an RHCE 7 exam objective.

RHEL7: Access a virtual machine’s console

2 minute read

Note: This is an RHCSA 7 exam objective.

SYS: Manage repositories.

less than 1 minute read

It is perfectly possible to point at several software repositories at the same time. To better deal with this situation, you need to use the yum repolist an...

SYS: Learn to use the yum command.

1 minute read

Presentation of yum

SYS: Learn to use the rpm command.

1 minute read

To install (-i) a new package (here httpd-2.2.15-29.el6.x86_64.rpm), type:

SYS: Configure a remote repository.

less than 1 minute read

To configure an access to a remote repository, create the /etc/yum.repos.d/remote.repo file and add the following lines:

SYS: Configure a local repository.

less than 1 minute read

Create a directory where packages will be stored:

RHEL7: Use yum transaction history.

6 minute read

Presentation

RHEL7: How to install the EPEL repository.

less than 1 minute read

Presentation

RHEL7: How to get started with Systemd.

17 minute read

Presentation

RHEL7: How to get started with package groups.

3 minute read

Presentation

RHEL7: How to get started with delta rpms.

3 minute read

Presentation

RHEL7: How to get started with CGroups.

8 minute read

General Presentation

RHEL7: Configure network teaming between two RHEL systems.

3 minute read

Presentation

RHEL7: Configure network bonding between two RHEL systems.

3 minute read

Presentation

RHEL7: Configure a Kerberos KDC.

4 minute read

Presentation of Kerberos

Back to top ↑

RHCSA

RHEL7: How to deal with KVM certificate expiration.

3 minute read

Presentation

RHEL7: Configure a physical machine to host virtual guests.

1 minute read

Note: This is an RHCSA 7 exam objective.

SYS: Start and stop virtual machines.

less than 1 minute read

Note: This is an RHCSA 7 exam objective.

SYS: Install and update software packages from Red Hat Network, a remote repository, or from the local file system.

less than 1 minute read

Note: This is an RHCSA 7 exam objective and an RHCE 7 exam objective.

SYS: Create and remove physical volumes, assign physical volumes to volume groups, and create and delete logical volumes

3 minute read

Note: This is an RHCSA 7 exam objective.

SYS: Create and manage Access Control Lists (ACLs).

1 minute read

Note: This is an RHCSA 7 exam objective.

SYS: Identify CPU/memory intensive processes, adjust process priority with renice, and kill processes

less than 1 minute read

Note: This is an RHCSA 7 exam objective.

SYS: Create hard and soft links

less than 1 minute read

Note: This is an RHCSA 7 exam objective.

SYS: Create and edit text files

less than 1 minute read

Note: This is an RHCSA 7 exam objective.

SYS: Create, delete, and modify local user accounts

less than 1 minute read

Note: This is an RHCSA 7 exam objective.

SYS: Create, delete, and modify local groups and group memberships

less than 1 minute read

Note: This is an RHCSA 7 exam objective.

SYS: Configure systems to mount file systems at boot by Universally Unique ID (UUID) or label

1 minute read

Note: This is an RHCSA 7 exam objective.

SYS: Configure systems to launch virtual machines at boot

less than 1 minute read

Note: This is an RHCSA 7 exam objective.

SYS: Create and configure set-GID directories for collaboration

1 minute read

Note: This is an RHCSA 7 exam objective.

SYS: Change passwords and adjust password aging for local user accounts

less than 1 minute read

Note: This is an RHCSA 7 exam objective.

SYS: Archive, compress, unpack, and uncompress files using tar, star, gzip, and bzip2

less than 1 minute read

Note: This is an RHCSA 7 exam objective.

SYS: Add new partitions and logical volumes, and swap to a system non-destructively

1 minute read

Note: This is an RHCSA 7 exam objective.

SELINUX: Use boolean settings to modify system SELinux settings

3 minute read

Note: This is an RHCSA 7 exam objective.

SELINUX: Set enforcing and permissive modes for SELinux

1 minute read

Note: This is an RHCSA 7 exam objective.

SELINUX: Restore default file contexts.

less than 1 minute read

Note: This is an RHCSA 7 exam objective.

SELINUX: List and identify SELinux file and process context

less than 1 minute read

Note: This is an RHCSA 7 exam objective.

SELINUX: Diagnose and address routine SELinux policy violations

1 minute read

Note: This is an RHCSA 7 exam objective.

RHEL7: Create, mount, unmount, and use vfat, ext4 and xfs file systems

5 minute read

Note: This is an RHCSA 7 exam objective.

RHEL7: Update the kernel package appropriately to ensure a bootable system

less than 1 minute read

Note: This is an RHCSA 7 exam objective.

RHEL7: Start, stop, and check the status of network services.

1 minute read

Note: This is an RHCSA 7 exam objective and an RHCE 7 exam objective.

RHEL7: How to set up the NTP service

7 minute read

Note: This is an RHCSA 7 exam objective and an RHCE 7 exam objective.

RHEL7: Securely transfer files between systems

1 minute read

Note: This is an RHCSA 7 exam objective.

RHEL7: Mount and unmount CIFS and NFS network file systems

1 minute read

Note: This is an RHCSA 7 exam objective.

RHEL7: Locate, read, and use system documentation including man, info, and files in /usr/share/doc.

2 minute read

Note: This is an RHCSA 7 exam objective.

RHEL7: Interrupt the boot process in order to gain access to a system.

2 minute read

Note: This is a critical RHCSA 7 exam objective (if you can’t take control of a VM through a reboot at the beginning of the exam, you will fail it entirely).

RHEL7: Locate and interpret system log files and journals

2 minute read

Note: This is an RHCSA 7 exam objective.

RHEL7: Install Red Hat Enterprise Linux systems as virtual guests

1 minute read

Note: This is an RHCSA 7 exam objective.

RHEL7: How to get started with GRUB2

4 minute read

Note: This is an RHCSA 7 exam objective.

RHEL7: How to get started with Firewalld

14 minute read

Note: This is an RHCSA 7 exam objective and an RHCE 7 exam objective.

RHEL7: Extend existing unencrypted logical volumes

4 minute read

Note: This is an RHCSA 7 exam objective.

RHEL7: List, create, delete partitions on MBR and GPT disks

7 minute read

Note: This is an RHCSA 7 exam objective.

RHEL7: Configure systems to boot into a specific target automatically

less than 1 minute read

Note: This is an RHCSA 7 exam objective.

RHEL7: Configure a system to use an existing LDAP directory service for user and group information

1 minute read

Note: This is an RHCSA 7 exam objective.

RHEL7: Configure SSH key-based authentication

2 minute read

Note: This is an RHCSA 7 exam objective and an RHCE 7 exam objective.

RHEL7: Configure IPv4 addresses and perform basic IPv4 troubleshooting

9 minute read

Note: This is an RHCSA 7 exam objective.

RHEL7: Boot systems into different targets manually

1 minute read

Note: This is an RHCSA 7 exam objective.

RHEL7: Boot, reboot, and shut down a system normally.

less than 1 minute read

Note: This is an RHCSA 7 exam objective.

RHEL7: Access a virtual machine’s console

2 minute read

Note: This is an RHCSA 7 exam objective.

Back to top ↑

RHCE

RHEL7: Use SELinux port labelling to allow services to use non-standard ports.

2 minute read

Note: This is an RHCE 7 exam objective.

RHEL7: Use Kerberos to control access to NFS network shares.

5 minute read

Note: This is an RHCE 7 exam objective.

RHEL7: Start, stop, and check the status of network services.

1 minute read

Note: This is an RHCSA 7 exam objective and an RHCE 7 exam objective.

RHEL7: How to set up the NTP service

7 minute read

Note: This is an RHCSA 7 exam objective and an RHCE 7 exam objective.

RHEL7: Provide SMB network shares to specific clients.

2 minute read

Note: This is an RHCE 7 exam objective.

RHEL7: Provide NFS network shares suitable for group collaboration.

1 minute read

Note: This is an RHCE 7 exam objective.

RHEL7: Provide NFS network shares to specific clients.

3 minute read

Note: This is an RHCE 7 exam objective.

RHEL7: Produce and deliver reports on system utilization (processor, memory, disk, and network).

less than 1 minute read

Note: This is an RHCE 7 exam objective.

RHEL7: Perform simple SQL queries against a database.

2 minute read

Note: This is an RHCE 7 exam objective.

RHEL7: How to install a MariaDB/MySql service.

6 minute read

Note: This is an RHCE 7 exam objective.

RHEL7: How to get started with Firewalld

14 minute read

Note: This is an RHCSA 7 exam objective and an RHCE 7 exam objective.

RHEL7: Deploy an Apache basic CGI application.

1 minute read

Note: This is an RHCE 7 exam objective.

RHEL7: Create a simple database schema.

3 minute read

Note: This is an RHCE 7 exam objective.

RHEL7: Configure a system to forward all email to a central mail server.

4 minute read

Note: This is an RHCE 7 exam objective.

RHEL7: Configure a system to authenticate using Kerberos.

2 minute read

Note: This is an RHCE 7 exam objective.

RHEL7: Configure a system as either an iSCSI target or initiator that persistently mounts an iSCSI target.

8 minute read

Note: This is an RHCE 7 exam objective.

RHEL7: Configure a caching-only name server.

less than 1 minute read

Note: This is an RHCE 7 exam objective.

RHEL7: Configure an Apache virtual host.

1 minute read

Note: This is an RHCE 7 exam objective.

RHEL7: Configure Apache TLS security.

4 minute read

Note: This is an RHCE 7 exam objective.

RHEL7: Configure Apache access restrictions on directories.

1 minute read

Note: This is an RHCE 7 exam objective. It has been renamed in June 2016 from “Configure private directories” to “Configure access restrictions on directorie...

RHEL7: Configure Apache group-managed content.

less than 1 minute read

Note: This is an RHCE 7 exam objective.

RHEL7: Configure aggregated network links between two RHEL systems.

less than 1 minute read

Note: This is an RHCE 7 exam objective.

RHEL7: Configure additional SSH options described in documentation.

2 minute read

Note: This is an RHCE 7 exam objective.

RHEL7: Backup and restore a MariaDB database.

2 minute read

Note: This is an RHCE 7 exam objective.

Back to top ↑

SYS

LINUX: Choose a Linux distribution.

3 minute read

Presentation

SYS: Start and stop virtual machines.

less than 1 minute read

Note: This is an RHCSA 7 exam objective.

SYS: Install and update software packages from Red Hat Network, a remote repository, or from the local file system.

less than 1 minute read

Note: This is an RHCSA 7 exam objective and an RHCE 7 exam objective.

SYS: Create and remove physical volumes, assign physical volumes to volume groups, and create and delete logical volumes

3 minute read

Note: This is an RHCSA 7 exam objective.

SYS: Create and manage Access Control Lists (ACLs).

1 minute read

Note: This is an RHCSA 7 exam objective.

SYS: Identify CPU/memory intensive processes, adjust process priority with renice, and kill processes

less than 1 minute read

Note: This is an RHCSA 7 exam objective.

SYS: Create hard and soft links

less than 1 minute read

Note: This is an RHCSA 7 exam objective.

SYS: Create and edit text files

less than 1 minute read

Note: This is an RHCSA 7 exam objective.

SYS: Create, delete, and modify local user accounts

less than 1 minute read

Note: This is an RHCSA 7 exam objective.

SYS: Create, delete, and modify local groups and group memberships

less than 1 minute read

Note: This is an RHCSA 7 exam objective.

SYS: Configure systems to mount file systems at boot by Universally Unique ID (UUID) or label

1 minute read

Note: This is an RHCSA 7 exam objective.

SYS: Configure systems to launch virtual machines at boot

less than 1 minute read

Note: This is an RHCSA 7 exam objective.

SYS: Create and configure set-GID directories for collaboration

1 minute read

Note: This is an RHCSA 7 exam objective.

SYS: Change passwords and adjust password aging for local user accounts

less than 1 minute read

Note: This is an RHCSA 7 exam objective.

SYS: Archive, compress, unpack, and uncompress files using tar, star, gzip, and bzip2

less than 1 minute read

Note: This is an RHCSA 7 exam objective.

SYS: Add new partitions and logical volumes, and swap to a system non-destructively

1 minute read

Note: This is an RHCSA 7 exam objective.

RHEL7: How to install an Apache service.

1 minute read

Installation Procedure

SYS: Manage repositories.

less than 1 minute read

It is perfectly possible to point at several software repositories at the same time. To better deal with this situation, you need to use the yum repolist an...

SYS: Learn to use the yum command.

1 minute read

Presentation of yum

SYS: Learn to use the rpm command.

1 minute read

To install (-i) a new package (here httpd-2.2.15-29.el6.x86_64.rpm), type:

SYS: Configure a remote repository.

less than 1 minute read

To configure an access to a remote repository, create the /etc/yum.repos.d/remote.repo file and add the following lines:

SYS: Configure a local repository.

less than 1 minute read

Create a directory where packages will be stored:

Back to top ↑

Ubuntu

UFW Essentials: Common Firewall Rules and Commands

6 minute read

Introduction

Installing and Using the Vim Text Editor on a Cloud Server

7 minute read

Introduction

How To Edit the Sudoers File on Ubuntu and CentOS

12 minute read

Introduction

SSH Essentials: Working with SSH Servers, Clients, and Keys

35 minute read

Introduction

How To Create SSH Keys With PuTTY to Connect to a VPS

7 minute read

Benefits of Public & Private SSH Keys

How To Configure SSH Key-Based Authentication on a Linux Server

12 minute read

Introduction

Initial Server Setup with Ubuntu 16.04

9 minute read

Introduction

How To Set Up an OpenVPN Server on Ubuntu 16.04

26 minute read

Introduction

How To Use SFTP to Securely Transfer Files with a Remote Server

9 minute read

What is SFTP?

How To Use FileZilla to Transfer and Manage Files Securely on your VPS

5 minute read

Introduction

How Fail2Ban Works to Protect Services on a Linux Server

18 minute read

Introduction

Back to top ↑

Security

SSH Essentials: Working with SSH Servers, Clients, and Keys

35 minute read

Introduction

How To Log Into Your Droplet with PuTTY (for windows users)

1 minute read

Introduction

How To Create SSH Keys With PuTTY to Connect to a VPS

7 minute read

Benefits of Public & Private SSH Keys

How To Configure SSH Key-Based Authentication on a Linux Server

12 minute read

Introduction

How To Protect SSH With Fail2Ban on CentOS 7

7 minute read

Introduction

How Fail2Ban Works to Protect Services on a Linux Server

18 minute read

Introduction

Back to top ↑

YUM

SYS: Manage repositories.

less than 1 minute read

It is perfectly possible to point at several software repositories at the same time. To better deal with this situation, you need to use the yum repolist an...

SYS: Learn to use the yum command.

1 minute read

Presentation of yum

SYS: Configure a remote repository.

less than 1 minute read

To configure an access to a remote repository, create the /etc/yum.repos.d/remote.repo file and add the following lines:

SYS: Configure a local repository.

less than 1 minute read

Create a directory where packages will be stored:

RHEL7: Use yum transaction history.

6 minute read

Presentation

RHEL7: How to get started with package groups.

3 minute read

Presentation

Back to top ↑

Apache

RHEL7: How to install an Apache service.

1 minute read

Installation Procedure

RHEL7: Deploy an Apache basic CGI application.

1 minute read

Note: This is an RHCE 7 exam objective.

RHEL7: Configure an Apache virtual host.

1 minute read

Note: This is an RHCE 7 exam objective.

RHEL7: Configure Apache TLS security.

4 minute read

Note: This is an RHCE 7 exam objective.

RHEL7: Configure Apache access restrictions on directories.

1 minute read

Note: This is an RHCE 7 exam objective. It has been renamed in June 2016 from “Configure private directories” to “Configure access restrictions on directorie...

RHEL7: Configure Apache group-managed content.

less than 1 minute read

Note: This is an RHCE 7 exam objective.

Back to top ↑

SELINUX

SELINUX: Use boolean settings to modify system SELinux settings

3 minute read

Note: This is an RHCSA 7 exam objective.

SELINUX: Set enforcing and permissive modes for SELinux

1 minute read

Note: This is an RHCSA 7 exam objective.

SELINUX: Restore default file contexts.

less than 1 minute read

Note: This is an RHCSA 7 exam objective.

SELINUX: List and identify SELinux file and process context

less than 1 minute read

Note: This is an RHCSA 7 exam objective.

SELINUX: Diagnose and address routine SELinux policy violations

1 minute read

Note: This is an RHCSA 7 exam objective.

RHEL7: Use SELinux port labelling to allow services to use non-standard ports.

2 minute read

Note: This is an RHCE 7 exam objective.

Back to top ↑

SSH

RHEL7: Configure additional SSH options described in documentation.

2 minute read

Note: This is an RHCE 7 exam objective.

SSH Essentials: Working with SSH Servers, Clients, and Keys

35 minute read

Introduction

How To Log Into Your Droplet with PuTTY (for windows users)

1 minute read

Introduction

How To Create SSH Keys With PuTTY to Connect to a VPS

7 minute read

Benefits of Public & Private SSH Keys

How To Configure SSH Key-Based Authentication on a Linux Server

12 minute read

Introduction

Back to top ↑

MariaDB

RHEL7: Perform simple SQL queries against a database.

2 minute read

Note: This is an RHCE 7 exam objective.

RHEL7: How to install a MariaDB/MySql service.

6 minute read

Note: This is an RHCE 7 exam objective.

RHEL7: Create a simple database schema.

3 minute read

Note: This is an RHCE 7 exam objective.

RHEL7: Backup and restore a MariaDB database.

2 minute read

Note: This is an RHCE 7 exam objective.

Back to top ↑

PuTTY

How To Log Into Your Droplet with PuTTY (for windows users)

1 minute read

Introduction

How To Create SSH Keys With PuTTY to Connect to a VPS

7 minute read

Benefits of Public & Private SSH Keys

Back to top ↑

Delta-rpms

RHEL7: How to get started with delta rpms.

3 minute read

Presentation

RHEL7: How to get started with CGroups.

8 minute read

General Presentation

Back to top ↑

BIND

RHEL7: Configure a master name server.

4 minute read

Presentation

RHEL7: Configure a caching-only name server.

less than 1 minute read

Note: This is an RHCE 7 exam objective.

Back to top ↑

POSTFIX

RHEL7: Configure a system to forward all email to a central mail server.

4 minute read

Note: This is an RHCE 7 exam objective.

RHEL7: Configure a central mail server.

2 minute read

Prerequisites

Back to top ↑

NFS

RHEL7: Provide NFS network shares suitable for group collaboration.

1 minute read

Note: This is an RHCE 7 exam objective.

RHEL7: Provide NFS network shares to specific clients.

3 minute read

Note: This is an RHCE 7 exam objective.

Back to top ↑

KVM

RHEL7: How to deal with KVM certificate expiration.

3 minute read

Presentation

RHEL7: Configure a physical machine to host virtual guests.

1 minute read

Note: This is an RHCSA 7 exam objective.

Back to top ↑

DOCKER

RHEL7: How to install Cockpit.

2 minute read

Presentation of Cockpit

RHEL7: How to get started with Atomic Host.

5 minute read

Presentation

Back to top ↑

PowerShell

PowerShell : Useful Commands

1 minute read

A collection of commands and scripts I’ve found useful when working with Windows PowerShell.

Back to top ↑

PHP7

Install PHP 7 on CentOS 7 and 6

2 minute read

This guide will help you install or upgrade PHP 7 on your webserver. It involves adding fedora epel repositories so that you can use “yum” to install packag...

Back to top ↑