February 2019 - luv-main

Scanning, challenging
by Mark Trickett 16 Feb '19

16 Feb '19

Hello All, As i have mentioned, I have an Agfa SnapScan, and it appears to have died. I have bought a new scanner, and checked compatibility with the sane website. The Canon CanoScan LiDE 120 is listed as supported, but with scanimage 1.0.27, while the up to date scanimage on Debian 9.7 is 1.0.25. I do have the backports enabled for APT and Synaptic, but it appears to not yet have been backported. I have found some mixed comments on the LinuxQuestions.org website, but from mid 2017, so the cautions may no longer apply. I would appreciate any comments and suggestions from this community. Regards, Mark Trickett

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Cron jobs + PHP ~ IMAP polling
by Piers 15 Feb '19

15 Feb '19

Hi there, I have a server that regularly runs jobs to import email via IMAP from remote servers. The cron runs a bash scrip that in turn iterates through the customer's install directories and then goes through each mail box that users have configured and parses the email. This is done by going back to get 100 email headers checking that the message ID hasn't been imported and if not getting the full body. The problem is that these jobs seem to run over each other and then eventually (occasionally) it will hang the server. I've tried a few things like getting less headers, spacing the cron jobs out and using lock files but neither combination has resolved this issue. I suspect that some of the IMAP services take too long to respond or rate limit connections (but since I don't control them I can't be sure). I am looking for suggestions as to: - How to fix the underlying problem - How to configure Nagios to monitor specific processes Many thanks Piers

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Peer to peer network-based file systems
by Jason White 14 Feb '19

14 Feb '19

I've been reading about IPFS (https://www.ipfs.io/) and I'm becoming interested in these emerging peer to peer technologies. Suppose that I want to share files among several of my machines, with synchronization of files/directories, but without a server/client arrangement. Encrypted network communication is also desirable, and none of the data should reside on anyone else's hardware. For convenience, modifying a file on one machine should result in changes eventually being distributed to the others as automatically as possible. Are there good options at this point? If so, what are the trade-offs and best implementations? This is partly a matter of curiosity, but if there's a good solution, I would be interested in trying it.

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SPF issues..... for list member (resent by list as the list, sort of)
by Andrew McGlashan 14 Feb '19

14 Feb '19

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Hi, PERHAPS, if the list is going to receive an email with faulty SPF, then it might be best to remove that header... better still, reject the message and have the sender fix the problems! - From luv-main-bounces(a)luv.asn.au Thu Jan 1 00:00:01 1970 Received: from itmustbe.luv.asn.au ([46.4.124.163]:37358 helo=luv.asn.au) by mail.affinityvision.com.au with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from <luv-main-bounces(a)luv.asn.au>) id 1gu5UK-0004bb-1x for andrew.mcglashan(a)affinityvision.com.au; Thu, 14 Feb 2019 12:06:52 +1100 Received: from itmustbe.luv.asn.au (localhost [IPv6:::1]) by luv.asn.au (Postfix) with ESMTP id 98533B36E; Thu, 14 Feb 2019 12:06:47 +1100 (AEDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=luv.asn.au; s=2015; t=1550106407; bh=veG8wHyn7wu50GUtTcECXMgtYFOIEtCr1feDWieku9s=; h=To:Subject:Date:List-Id:List-Unsubscribe:List-Archive:List-Post: List-Help:List-Subscribe:From:Reply-To:From; b=bGaB2kNiOq0YJY8QW6hOTTrE7wXpX+5sn76DoJCKs7j9eZ06gR1rgQNXZwJFwjo0J LElckrGe27Jinio6SWfoUxrS8CpXZwc95tGXd+tCX2g/sLursqcdwr5C0ygakRv/fA RvwAdmI0jld+UGHPZtkxXaTDLBuJ18lET9zsLq2A= X-Original-To: luv-main(a)luv.asn.au Delivered-To: luv-main(a)luv.asn.au Received-SPF: permerror (recruitonline.com.au: Redundant applicable 'v=spf1' sender policies found) receiver=luv.asn.au; identity=mailfrom; envelope-from="piers.rowan(a)recruitonline.com.au"; helo=mail-pg1-x52a.google.com; client-ip="2607:f8b0:4864:20::52a" Kind Regards AndrewM -----BEGIN PGP SIGNATURE----- iHUEAREIAB0WIQTJAoMHtC6YydLfjUOoFmvLt+/i+wUCXGTmQgAKCRCoFmvLt+/i +4owAP9fFGBdNntpyS1tcZ/OF7jYwJbgEdC2x1SsqyFtQ7ie5QD7B1De8SbbAS7d DX0Lc5wIZk5TG2Bf0JRIcgBUKzNkZxM= =M/+5 -----END PGP SIGNATURE-----

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Phone App Development Strategies - LAMP backend
by Piers 14 Feb '19

14 Feb '19

Hi there, We have an existing platform that uses a separate MySQL instance for each customer and a shared application code base in PHP. Our platform has an API but this is mainly used for system admin and not fully featured and is an in-house MVC framework. We have been given a spec from a customer as to what they want in the app. We will be hiring a developer for this work Goal: - To have a phone app for both major platforms that we can re-use and re-sell to other customers of our existing platform if they need it I am seeking input on: - API / Framework We could use our own API but as its a separate project we could use a well know framework (Laravel, etc) and reduce the leaning curve for the developer and draw from a wider candidate pool. Alternately we could have the dev only focused upon the app and my team can work on extending the API. - Phone Development Which approach have you found better; using a cross platform development tool like Cordova (one app is developed) or using the the tools provided by iPhone and Andriod and writing two apps? Any feedback is appreciated. Thanks Piers

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moving partition
by Nic Baxter 03 Feb '19

03 Feb '19

Hi All I am moving a 1TB NTFS partition 200MB to the right using gparted and of course it is very slow. I don't understand why gparted is moving all of the data. Why not just move 200MB and add it to the end of the partition? My googling only tells me how to do it but not why. Cheers Nic

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openwrt recommendations
by Robin Humble 02 Feb '19

02 Feb '19

Hiya, my venerable linksys wrt54gs running openwrt is still going strong, but probably can't handle NBN 100 Mbit even on lobotomised HFC, so I guess it's time for a new router... any recommendations for a 2+ port gigabit and (I guess) AC WiFi that can hopefully run openwrt ok for the next decade? I don't need or want any USB or NAS or gaming. ATA for landline optional. I looked at newer linksys wrt32x but they're $450 from jb (prob $250 from amazon but they don't seem to ship to .au (again)) and also they're outliers running marvel chipsets. after that I just get confused in the maze of 100's of routers that could run openwrt vs. what you can buy today that's an ok price. I'm open to other options if they're interesting or cheaper/better - eg. little arm boards with a couple of gige ports and ac wifi as long as they run centos/fedora/openwrt or similar. thanks! cheers, robin

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