for an upcoming project, one of the longer-term goals is to establish a secure OTA update system for potentially hundreds or thousands of remote (internet-connected) devices, which might need to be updated en masse identically, or updated individually. i'm currently collecting examples of available solutions (https://mender.io/, https://sbabic.github.io/swupdate/swupdate.html, and so on), and the current custodians of the system have already had animated discussions as to what they think would work, and what properties it should have. on the one hand, there is the notion of a package-based system, where one can download and update individual packages (rpm, apt, ipk, etc...) as necessary. the ostensible downside to this is that, over time, it's entirely possible that different remote systems will have different updates applied and slowly get out of sync with one another. is that a big deal? well, if you're a linux person, no, since we're used to updating packages as we see fit. however, embedded developers who are used to installing a single, monolithic executable would argue that the downside is that there is no single identifier for the software currently running. if one asks, "what version of the OS are you running?", there is no single identifier that means anything -- you would need to examine the entire manifest of installed software. on the other hand, if the only supported OTA update is to replace the entirety of the installed OS, you could theoretically version every single possibility, but that gets cumbersome. i could go on, but has anyone here worked with such a system and be willing to describe their solution? i'm just collecting possibilities to be further debated. rday -- ======================================================================== Robert P. J. Day Ottawa, Ontario, CANADA http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ======================================================================== To unsubscribe send a blank message to linux+unsubscribe [ at ] linux-ottawa [ dot ] org To get help send a blank message to linux+help [ at ] linux-ottawa [ dot ] org To visit the archives: https://lists.linux-ottawa.org