Okay, specifically in the case of that Telnet package:
* Patches:
/etc/inittab
* Adds:
/etc/inetd.conf.user
/etc/init.d/rcS2
So, ideally, you'd need to remove the two added files and restore a vanilla inittab. Where it gets fun is that Kobo update packages do *not* contain the full rootfs, so you can't pull it out of a FW update.
That leaves the factory reset FW copy, but I've never played with accessing it.
EDIT: Possibly in /dev/mmcblk0p2 (according to @frostschutz's stuff, which I shamefully forgot when listing stuff that could get you telnet before). Mount it ro to avoid screwing whith it.
Last edited by NiLuJe; 06-03-2018 at 05:15 PM.
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