LinuxSecurity.com

Seeing the word ''telnet'' on a system tends to trigger a reaction. For some admins, it means risk. For others, it means legacy noise that can be ignored. The problem is that those reactions often fire before anyone stops to ask a quieter, more important question. Is this a client sitting idle, or is there a service listening for connections?

Linux servers already have package managers. For most admins, that creates an assumption that patching is largely solved. Run updates, reboot when needed, move on. In small environments, that can feel true for a long time. Then the environment grows, security advisories start landing more often, and someone asks a simple question you cannot answer cleanly: Which systems are actually patched right now?

We've been telling ourselves that Snap apps are sandboxed, signed, and therefore low-risk. Not perfect, but good enough. That assumption has been holding for years, mostly because it hasn't been tested in a way that mattered to day-to-day operations.