Question about a package

OS type and version REQUIRED
Virtualmin version REQUIRED

just a small question here - what does this package does and is it part of Virtualmin/Webmin or it’s from the OS ?

[shim-signed]( Secure Boot chain-loading bootloader (Microsoft-signed binary) **New version 1.51.3+15.7-0ubuntu1** Jammy-updates

comes from the OS. necessary if you boot using UEFI.

shim-signed: Secure Boot chain-loading bootloader (Microsoft-signed binary)

This package provides a minimalist boot loader which allows verifying
signatures of other UEFI binaries against either the Secure Boot DB/DBX or
against a built-in signature database. Its purpose is to allow a small,
infrequently-changing binary to be signed by the UEFI CA, while allowing
an OS distributor to revision their main bootloader independently of the CA.
This package contains the version of the bootloader binary signed by the
Microsoft UEFI CA.

Thank you very much for this clarification.

On a side note, it sounds strange, that Ubuntu based system needs something, signed by Microsoft.

if ubuntu wants to boot using UEFI/SecureBoot that’s the only way. Debian and most mainstream linux distros do the same thing…
related reads :

if you boot using “Legacy Boot”, then you don’t need any of that.

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