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ENOPKG
ENOPKG is a legacy errno meaning “Package not installed”. In Linux diagnostics, “package” here should not automatically be read as a distribution package manager result. It is an errno value retained in the kernel UAPI namespace for subsystem and compatibility use.
Look for the facility that was expected to be registered or loaded: a protocol module, compatibility service, optional kernel facility, or library component. Installing an RPM or DEB by name is not necessarily the right fix unless the failing component explicitly maps the missing software package to this errno.
Useful evidence
- The module, device, filesystem, or protocol requested by the failing operation.
- Whether the kernel has the facility built in, loadable, blocked, or absent.
- Any surrounding
dmesg, module loader, or service registration messages.
Linux errno(3) · Linux UAPI errno definitions
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