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Running Systems

(and me chasing them)

Running Systems
Running Systems
(and me chasing them)
  • sign_and_send_pubkey: signing failed for RSA from agent: agent refused operation
    Linux

    sign_and_send_pubkey: signing failed for RSA from agent: agent refused operation

    Byetzion 01/06/202125/07/2023

    This is a problem which bugs the Internet. Many solutions were suggested. All of them work sometimes (like making sure that the permissions on the private/public SSH key files are correct). One solution which never gets mentioned is about DNS. When attempting login to a remote server, the server attempts to resolve the connecting address…

    Read More sign_and_send_pubkey: signing failed for RSA from agent: agent refused operationContinue

  • bash | Disk Storage | Linux | Scripting/Programming

    ZFS clone script

    Byetzion 28/03/202119/01/2022

    ZFS has some magical features, comparable to NetApp’s WAFL capabilities. One of the less-used on is the ZFS send/receive, which can be utilised as an engine below something much like NetApp’s SnapMirror or SnapVault. The idea, if you are not familiar with NetApp’s products, is to take a snapshot of a dataset on the source,…

    Read More ZFS clone scriptContinue

  • Disk Storage | Linux

    Extend /boot from within a Linux system

    Byetzion 27/03/202127/03/2021

    This is a tricky one. In order to resize /boot, which is, commonly the first partition, you need to push forward the beginning of the next partition. This is not an easy task, especially if you are not using LVM – then you have to use external partitioning modification tools, like PQMagic (if it still…

    Read More Extend /boot from within a Linux systemContinue

  • Ubuntu 20.04 and TPM2 encrypted system disk
    Disk Storage | Linux | Scripting/Programming

    Ubuntu 20.04 and TPM2 encrypted system disk

    Byetzion 18/02/202111/03/2023

    An update: I am adding a link to a post where I share my thoughts about the additional steps required to protect a Linux system against physical access to data. I add it at the top of this article, because I want some insight from you – the people who might read this post. It…

    Read More Ubuntu 20.04 and TPM2 encrypted system diskContinue

  • Linux

    Koji repo for Centos/OEL 8

    Byetzion 19/01/202119/01/2021

    I was missing some bleeding-edge packages, and while I was able to find the RPM packages, I was unable to find the repo path. So, thanks to this post, I was able to use it. This will probably break my Linux, so I will use it in a test environment first.The repo file would look…

    Read More Koji repo for Centos/OEL 8Continue

  • Linux

    Recover non-booting Linux

    Byetzion 23/07/202028/07/2020

    Linux boot sequence includes many stages. Following the BIOS initialisation, the boot loader is being called (GRUB or GRUB-EFI), then GRUB does its magic, and then it loads the kernel and the init RAM FS (initramfs or initrd) to memory. Following that, the kernel is jumped to, and a set of scripts are called from…

    Read More Recover non-booting LinuxContinue

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