Modern Kernel specification (can be seen here) defined the initial ramdisk (initrd or initramfs, depends on who you ask) to allow stacking of compressed or uncompressed CPIO archives. It means, in fact, that you can extend your current initramfs by appending a cpio.gz (or cpio) file at the end, containing the additions or changes to…
I came across a Linux host (RHEL6.2) which I was not the one managing before, which required adding a node in Oracle 11.2 Grid Infrastructure. According the common documentations, as can be seen here, after cloning the host (or installing it correctly, according to Oracle requirements), you should run ‘cluvfy’ on the existing cluster node….
SSH is a wonderful tool. One of its best features is the ability to pierce a firewall and let you go through it. If you’re using the dynamic port (-D as argument in command line openSSH), you actually get a SOCKS5 proxy over which you can transport all your desired data. This allows you the…
Installing VirtualBox on Ubuntu 18 (same as for modern Fedora Core) with SecureBoot will result in the following error when running the command /sbin/vboxsetup The error message would be something like this: There were problems setting up VirtualBox. To re-start the set-up process, run /sbin/vboxconfig as root. If your system is using EFI Secure Boot…
Just to remember, there is an explanation here, from which the following directive can be taken: (cpio -id; zcat | cpio -id) < /path/to/initrd.img
*** EDIT *** : An updated version of this post can be found here: https://run.tournament.org.il/ubuntu-20-04-and-tpm2-encrypted-system-disk/ When you encrypt your entire disk, you are required to enter your passphrase every time you boot your computer. The TPM device has a purpose – keeping your secrets secure (available only to your running system), and combined with SecureBoot,…
