Kernel basics – UEK and RHCK Before we get started with UEK and RHCK, let’s understand what is a Linux kernel. A Linux kernel release refers to an updated version of the core component of the Linux operating system. Its main function is to act as a bridge between the hardware and software layers of […]
Category: Appendix – kickstart options
Playing with UEFI 2 – Exploring the Various Boot Options and Kernels in Oracle Linux
How to do it… Let’s run the df -h command to view the partitions in the system. Please notice that /boot/efi is mounted on the /dev/sda1 partition in this example: Figure 3.10 – df -h command If you run the ls -l /boot/efi/EFI/redhat command, this directory contains a first-stage bootloader called shimx64.efi, a GRUB 2 […]
Playing with Secure Boot 2 – Exploring the Various Boot Options and Kernels in Oracle Linux
How to do it… [ req ]default_bits = 4096distinguished_name = req_distinguished_nameprompt = nostring_mask = utf8onlyx509_extensions = extensions[ req_distinguished_name ]O = Module Signing ExampleCN = Module Signing Example KeyemailAddress = [email protected][ extensions ]basicConstraints=critical,CA:FALSEkeyUsage=digitalSignatureextendedKeyUsage = codeSigningsubjectKeyIdentifier=hashauthorityKeyIdentifier=keyid You should edit the O, CN, and emailAddress fields to be more appropriate. Note that in the extensions section of the […]
Playing with Secure Boot – Exploring the Various Boot Options and Kernels in Oracle Linux
Playing with Secure Boot Secure Boot is an additional optional feature implemented in UEFI intended to help prevent malware execution during a boot process. To enable or disable Secure Boot, you need to access your specific UEFI setup program. This is different for each system manufacturer. Check your system documentation to see how to access […]
What you need to know about local filesystems – Creating and Managing Single-Instance Filesystems
What you need to know about local filesystems This recipe will discuss the differences between local and remote filesystems, as well as the core differences between Btrfs and ZFS. The backbone of an operating system (OS) is the local filesystem. It enables efficient storage and management of files and directories on a computer or server […]
What you need to know about local filesystems 2 – Creating and Managing Single-Instance Filesystems
How to do it… Oracle Linux by default uses the XFS filesystem, but when doing the installation, you can use Btrfs as the root filesystem. If you want to use XFS as the boot filesystem, install it as you normally would. If you want to use Btrfs, then you should continue. Note Your boot filesystem […]