Beginning CentOS 7 Administration

Installing CentOS 7 10 lectures 51:45 The Course Overview This video provides an overview of the entire course. Downloading CentOS and confirming the checksum The aim of this video is to learn how to download and confirm a checksum in a linux server • Get started with an OS of your choice • Download the checksum file • Generate the checksum of your downloaded iso image file Creating USB Installation Media Nowadays Installing a new operating system such as CentOS Linux using USB device is indeed essential • Get introduced to the concept of creating an exact copy of CentOS installation iso file on a USB device • Prepare USB on OS X and Linux • Prepare USB on Windows Installing CentOS 7 Using the Graphical Installer Performing an installation of CentOS 7 using the graphical installer interface is the recommended approach to installing your system, as it not only provides us with the ability to create the desired hard disk partitions but also to customize installation in lots of ways. • Select the correct installation boot device during server start up • Load the CentOS 7 installation media • Customize the installation via graphical installer Running a Net Install over HTTP Running a CentOS 7 netinstall is a process in which a small image file is used to boot the computer and let the user select and install only the software packages and services he wants and nothing more over a network connection thus providing great flexibility • Download the CentOS 7 netinstall ISO file • Prepare a USB installation media from it and validate its checksum • Install CentOS 7 over HTTP using an official CentOS 7 repository mirror Installing CentOS 7 Using a Kick Start File While installing CentOS 7 manually, using the graphical installer utility is fine on a single server. Doing so on a multiple number of systems can be tedious. Kickstart files can automate the installation process of a server system • Fetch an existing Kickstart file as a template from a former CentOS 7 installation and copy on USB device • Boot into rescue mode to get correct device name order • Select your target device name for installation Customize Your Kickstart Installation and Run It Kickstart files are simple text based configuration files which provide detailed and exact instructions on how the target system should be set up and installed (for example, which keyboard layout or additional software packages to install). • Customize your Kickstart file • Validate the changes you made to the file • Run the Kickstart installation Customizing the Boot Loader When you turn on your computer, the GRUB2 boot loader is the first program that starts up and is responsible for loading and transferring control to an underlying operating system. It has a lot of flexibility in configuration and supports a lot of different operating systems • Make a backup of your default grub configuration file • Customize your default grub configuration file • Generate the GRUB2 configuration using the grub2-mkconfig program Troubleshooting the System in Rescue Mode Linux can have a steep learning curve and sooner or later there will be a point in your career where your CentOS installation does not start up due to broad number of reasons, including hardware problems or human mistakes. If this has happened to you then you can use the CentOS rescue mode in order to boot an otherwise unbootable system and try to undo your mistakes. • Reset your root password if forgotten • Access the original servers filesystem if you cannot boot • Mount additional partitions of your original server Enhancing Your New CentOS 7 Installation The CentOS 7 minimal install is probably the most efficient way you can install a server, but does require some additional features in order to make your server a more compelling model. • Update the system after installation • Reboot the system if first-time updating • Install useful additional software package groups using yum Installing CentOS 7. 10 lectures 51:45 The Course Overview This video provides an overview of the entire course. Downloading CentOS and confirming the checksum The aim of this video is to learn how to download and confirm a checksum in a linux server • Get started with an OS of your choice • Download the checksum file • Generate the checksum of your downloaded iso image file Creating USB Installation Media Nowadays Installing a new operating system such as CentOS Linux using USB device is indeed essential • Get introduced to the concept of creating an exact copy of CentOS installation iso file on a USB device • Prepare USB on OS X and Linux • Prepare USB on Windows Installing CentOS 7 Using the Graphical Installer Performing an installation of CentOS 7 using the graphical installer interface is the recommended approach to installing your system, as it not only provides us with the ability to create the desired hard disk partitions but also to customize installation in lots of ways. • Select the correct installation boot device during server start up • Load the CentOS 7 installation media • Customize the installation via graphical installer Running a Net Install over HTTP Running a CentOS 7 netinstall is a process in which a small image file is used to boot the computer and let the user select and install only the software packages and services he wants and nothing more over a network connection thus providing great flexibility • Download the CentOS 7 netinstall ISO file • Prepare a USB installation media from it and validate its checksum • Install CentOS 7 over HTTP using an official CentOS 7 repository mirror Installing CentOS 7 Using a Kick Start File While installing CentOS 7 manually, using the graphical installer utility is fine on a single server. Doing so on a multiple number of systems can be tedious. Kickstart files can automate the installation process of a server system • Fetch an existing Kickstart file as a template from a former CentOS 7 installation and copy on USB device • Boot into rescue mode to get correct device name order • Select your target device name for installation Customize Your Kickstart Installation and Run It Kickstart files are simple text based configuration files which provide detailed and exact instructions on how the target system should be set up and installed (for example, which keyboard layout or additional software packages to install). • Customize your Kickstart file • Validate the changes you made to the file • Run the Kickstart installation Customizing the Boot Loader When you turn on your computer, the GRUB2 boot loader is the first program that starts up and is responsible for loading and transferring control to an underlying operating system. It has a lot of flexibility in configuration and supports a lot of different operating systems • Make a backup of your default grub configuration file • Customize your default grub configuration file • Generate the GRUB2 configuration using the grub2-mkconfig program Troubleshooting the System in Rescue Mode Linux can have a steep learning curve and sooner or later there will be a point in your career where your CentOS installation does not start up due to broad number of reasons, including hardware problems or human mistakes. If this has happened to you then you can use the CentOS rescue mode in order to boot an otherwise unbootable system and try to undo your mistakes. • Reset your root password if forgotten • Access the original servers filesystem if you cannot boot • Mount additional partitions of your original server Enhancing Your New CentOS 7 Installation The CentOS 7 minimal install is probably the most efficient way you can install a server, but does require some additional features in order to make your server a more compelling model. • Update the system after installation • Reboot the system if first-time updating • Install useful additional software package groups using yum The Course Overview This video provides an overview of the entire course. The Course Overview This video provides an overview of the entire course. The Course Overview This video provides an overview of the entire course. The Course Overview This video provides an overview of the entire course. This video provides an overview of the entire course. This video provides an overview of the entire course. Downloading CentOS and confirming the checksum The aim of this video is to learn how to download and confirm a checksum in a linux server • Get started with an OS of your choice • Download the checksum file • Generate the checksum of your downloaded iso image file Downloading CentOS and confirming the checksum The aim of this video is to learn how to download and confirm a checksum in a linux server • Get started with an OS of your choice • Download the checksum file • Generate the checksum of your downloaded iso image file Downloading CentOS and confirming the checksum The aim of this video is to learn how to download and confirm a checksum in a linux server • Get started with an OS of your choice • Download the checksum file • Generate the checksum of your downloaded iso image file Downloading CentOS and confirming the checksum The aim of this video is to learn how to download and confirm a checksum in a linux server • Get started with an OS of your choice • Download the checksum file • Generate the checksum of your downloaded iso image file The aim of this video is to learn how to download and confirm a checksum in a linux server • Get started with an OS of your choice • Download the checksum file • Generate the checksum of your downloaded iso image file The aim of this video is to learn how to download and confirm a checksum in a linux server • Get started with an OS of your choice • Download the checksum file • Generate the checksum of your downloaded iso image file Creating USB Installation Media Nowadays Installing a new operating system such as CentOS Linux using USB device is indeed essential • Get introduced to the concept of creating an exact copy of CentOS installation iso file on a USB device • Prepare USB on OS X and Linux • Prepare USB on Windows Creating USB Installation Media Nowadays Installing a new operating system such as CentOS Linux using USB device is indeed essential • Get introduced to the concept of creating an exact copy of CentOS installation iso file on a USB device • Prepare USB on OS X and Linux • Prepare USB on Windows Creating USB Installation Media Nowadays Installing a new operating system such as CentOS Linux using USB device is indeed essential • Get introduced to the concept of creating an exact copy of CentOS installation iso file on a USB device • Prepare USB on OS X and Linux • Prepare USB on Windows Creating USB Installation Media Nowadays Installing a new operating system such as CentOS Linux using USB device is indeed essential • Get introduced to the concept of creating an exact copy of CentOS installation iso file on a USB device • Prepare USB on OS X and Linux • Prepare USB on Windows Nowadays Installing a new operating system such as CentOS Linux using USB device is indeed essential • Get introduced to the concept of creating an exact copy of CentOS installation iso file on a USB device • Prepare USB on OS X and Linux • Prepare USB on Windows Nowadays Installing a new operating system such as CentOS Linux using USB device is indeed essential • Get introduced to the concept of creating an exact copy of CentOS installation iso file on a USB device • Prepare USB on OS X and Linux • Prepare USB on Windows Installing CentOS 7 Using the Graphical Installer Performing an installation of CentOS 7 using the graphical installer interface is the recommended approach to installing your system, as it not only provides us with the ability to create the desired hard disk partitions but also to customize installation in lots of ways. • Select the correct installation boot device during server start up • Load the CentOS 7 installation media • Customize the installation via graphical installer Installing CentOS 7 Using the Graphical Installer Performing an installation of CentOS 7 using the graphical installer interface is the recommended approach to installing your system, as it not only provides us with the ability to create the desired hard disk partitions but also to customize installation in lots of ways. • Select the correct installation boot device during server start up • Load the CentOS 7 installation media • Customize the installation via graphical installer Installing CentOS 7 Using the Graphical Installer Performing an installation of CentOS 7 using the graphical installer interface is the recommended approach to installing your system, as it not only provides us with the ability to create the desired hard disk partitions but also to customize installation in lots of ways. • Select the correct installation boot device during server start up • Load the CentOS 7 installation media • Customize the installation via graphical installer Installing CentOS 7 Using the Graphical Installer Performing an installation of CentOS 7 using the graphical installer interface is the recommended approach to installing your system, as it not only provides us with the ability to create the desired hard disk partitions but also to customize installation in lots of ways. • Select the correct installation boot device during server start up • Load the CentOS 7 installation media • Customize the installation via graphical installer Performing an installation of CentOS 7 using the graphical installer interface is the recommended approach to installing your system, as it not only provides us with the ability to create the desired hard disk partitions but also to customize installation in lots of ways. • Select the correct installation boot device during server start up • Load the CentOS 7 installation media • Customize the installation via graphical installer Performing an installation of CentOS 7 using the graphical installer interface is the recommended approach to installing your system, as it not only provides us with the ability to create the desired hard disk partitions but also to customize installation in lots of ways for installation Installing CentOS 7 Using a Kick Start File While installing CentOS 7 manually, using the graphical installer utility is fine on a single server. Doing so on a multiple number of systems can be tedious. Kickstart files can automate the installation process of a server system • Fetch an existing Kickstart file as a template from a former CentOS 7 installation and copy on USB device • Boot into rescue mode to get correct device name order • Select your...