main June 2016

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15 participants
8 discussions

Search all text files for a text string
by Mark Rogers 09 Jul '16

09 Jul '16

Is there a quick way to search all text files for a string? By "text file" I mean ASCII files, like log files, config files etc, but excluding binaries like executables, database files, etc? What I want is something like: find / -type a -exec grep 192.168.100.1 \{\} \; .. or similar, except that I made up "-type a" for ascii. (I'm trying to find all places that an IP address is mentioned so that I can change ones that need to be changed.) -- Mark Rogers // More Solutions Ltd (Peterborough Office) // 0844 251 1450 Registered in England (0456 0902) 21 Drakes Mews, Milton Keynes, MK8 0ER

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MicroSD card read issues
by Mark Rogers 30 Jun '16

30 Jun '16

Can anyone shed light on what the following entries in /var/log/syslog actually mean? Jun 16 11:43:45 mark-pc kernel: [92204.212656] sd 11:0:0:2: [sdf] tag#0 FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_SENSE Jun 16 11:43:45 mark-pc kernel: [92204.212669] sd 11:0:0:2: [sdf] tag#0 Sense Key : Hardware Error [current] Jun 16 11:43:45 mark-pc kernel: [92204.212675] sd 11:0:0:2: [sdf] tag#0 Add. Sense: No additional sense information Jun 16 11:43:45 mark-pc kernel: [92204.212683] sd 11:0:0:2: [sdf] tag#0 CDB: Read(10) 28 00 06 87 47 30 00 00 08 00 Jun 16 11:43:45 mark-pc kernel: [92204.212688] blk_update_request: I/O error, dev sdf, sector 109528880 Jun 16 11:43:45 mark-pc kernel: [92204.212696] Buffer I/O error on dev sdf1, logical block 13690854, async page read Background: This a pretty new Sandisk [1] 128GB MicroSD (UHS) card, taken out of my phone and plugged into my PC via a card reader (USB2). A previous card caused issues in my phone so I replaced it with this one, and it now is not behaving well (usually OK but sometimes if I try to look at photos on the card the phone will lock up temporarily). I'm trying to back everything up onto my PC so I can copy it across onto a Samsung card to see if that's better. The above errors crop up periodically in syslog whilst copying. Is the issue the card, the card reader, the PC, the drivers, ...? [1] I believe it to be genuine Sandisk, it was purchased from Amazon. Advice on how to verify it's not a fake welcomed! -- Mark Rogers // More Solutions Ltd (Peterborough Office) // 0844 251 1450 Registered in England (0456 0902) 21 Drakes Mews, Milton Keynes, MK8 0ER

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Raid10 degraded
by John Cohen 30 Jun '16

30 Jun '16

I have a small server Thinkserver ts140 for serving files via sftp to my colleagues, as well as a few other services. I run ubuntu 14.04 from a 500gig drive backed up nightly offsite, and have a separate raid10 array 4x 4TB (WD Reds) for the storage. They've been running fine for over a year until yesterday, when I received an email saying the array was degraded. " A DegradedArray event had been detected on md device /dev/md/0. P.S. The /proc/mdstat file currently contains the following: Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md0 : active raid10 sdb1[0] sde1[3] sdc1[4] 7813772288 blocks super 1.2 512K chunks 2 near-copies [4/3] [UU_U] unused devices: <none>" First thing I did was backup the most important files to an external drive via rsync. (I have run out of space for a full 8TB external drive backup and can't afford to buy any more drives just now) We also keep these more important files offsite) mdadm -D /dev/md0 shows that my third drive sdd1 was removed. I checked the smart tools to see if the drive was failing and saw nothing, even after running a self-test. I didn't check for disk errors on the drive itself as I'm not sure how this works in a raid setup. I did try re-adding the disk to the raid and it immediately picked it up and started recovering. This was the mdadm --examine shows of the raid status *before* I tried re-adding the removed drive: http://pastebin.com/P4Q4YhN7 I can't see anything wrong here, the only difference I saw was in the sdd section showing Array State AAAA instead of AA.A as the others were (. = missing) This morning I woke up to another email with the same message, and the disk sdd1 was removed again. I am adding the drive again to see what happens, but suspect the same results. Here's the mdadm --detail now: http://pastebin.com/CkBm6SbH dmesg since a recent reboot, with a lot of the repeats taken out: http://pastebin.com/jzWnYizV 1) Should I run any more tests on the drive itself? Any specific suggestions? Do you think it could be a hardware fault unrelated to the actual drive? I'm nervous of starting to swap things around to test this. 2) The drives are in warranty so I have contacted WD to ask for a replacement, although if the SMART tests don't show anything I don't know if they'll replace the drive 3) Should I tell my colleagues we're going to have to switch the machine off until the new drive arrives? (I am paranoid of a second drive failing before I get a new one) Any advice as to what I could do to test the drive/setup is appreciated. Please be aware I'm no linux guru, my field is in something completely different and I just happen to love learning about linux and have found it very useful to complement my office setup and work. Many thanks John

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2600 meeting at 18:00 on Friday the 1st July.
by Viperfang 28 Jun '16

28 Jun '16

Quick heads up about this months Norwich 2600 meeting, more info at http://www.norwich2600.co.uk

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Synchronising a few 'isolated' files between systems - how?
by Chris Green 23 Jun '16

23 Jun '16

I have set up syncthing on my systems and it works very well for folders where one wants to synchronise all the files. However I have a few what one might call 'isolated' files that I want to synchronise and I can't see any easy way to do this with syncthing. It's possible to use syncthing's .stignore file to do it but it's very clumsy and one would need to edit several files just to add one file to the list to be synchronised. I have pondered putting the 'isolated' files in a directory by themselves (which syncthing can synchronise) and having symbolic links to them from where they are actually used. However adding one file to the list would mean edits in several places. Any better ideas anyone? -- Chris Green

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Re: [ALUG] MicroSD card read issues
by Noel Galer 16 Jun '16

16 Jun '16

Hi I'm new to this, but have been 'Lurking' for a while as recommended for 'Noobs'. However, this is something I may be able to shed some light on, so here goes! There is an excellent website with lots of carefully prepared info on this topic and tools to help diagnose problems, test cards and make images. However, it is in Russia, and similar sites it is hosted alongside can have a bad reputation. Antivirus companies will make sweeping assumptions and some class the site as 'Bad'. I disagree, but you must decide for yourself. I suggest using Virustotal.com to check all the links and files before you download anything. I have successfully downloaded all the tools and have not had any issues. If you are not familiar with Virustotal you will be happy to know it scans what is on the internet before you download, simulating the use of the top 60 AntiVirus packages in the world and providing a comprehensive assessment. Having said that, 1 or 2 may try to indicate generic this and that. I believe this is just reverse engineering of one A/V by another based on a false positive. But you may decide to keep well clear - that's fine. You could always use a machine off your network that can be rebuilt / reimaged easily. But hey, isn't this one of Linux's strengths ? Here is the link, the text on it's own is quite informative and unlikely to infect anyone, many of the tools can also be found elsewhere too... https://www.raymond.cc/blog/test-and-detect-fake-or-counterfeit-usb-flas h-drives-bought-from-ebay-with-h2testw/ Cheers, Xorsyst -----Original Message----- From: main [mailto:main-bounces@lists.alug.org.uk] On Behalf Of Mark Rogers Sent: 16 June 2016 11:54 To: alug-main Subject: [ALUG] MicroSD card read issues Can anyone shed light on what the following entries in /var/log/syslog actually mean? Jun 16 11:43:45 mark-pc kernel: [92204.212656] sd 11:0:0:2: [sdf] tag#0 FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_SENSE Jun 16 11:43:45 mark-pc kernel: [92204.212669] sd 11:0:0:2: [sdf] tag#0 Sense Key : Hardware Error [current] Jun 16 11:43:45 mark-pc kernel: [92204.212675] sd 11:0:0:2: [sdf] tag#0 Add. Sense: No additional sense information Jun 16 11:43:45 mark-pc kernel: [92204.212683] sd 11:0:0:2: [sdf] tag#0 CDB: Read(10) 28 00 06 87 47 30 00 00 08 00 Jun 16 11:43:45 mark-pc kernel: [92204.212688] blk_update_request: I/O error, dev sdf, sector 109528880 Jun 16 11:43:45 mark-pc kernel: [92204.212696] Buffer I/O error on dev sdf1, logical block 13690854, async page read Background: This a pretty new Sandisk [1] 128GB MicroSD (UHS) card, taken out of my phone and plugged into my PC via a card reader (USB2). A previous card caused issues in my phone so I replaced it with this one, and it now is not behaving well (usually OK but sometimes if I try to look at photos on the card the phone will lock up temporarily). I'm trying to back everything up onto my PC so I can copy it across onto a Samsung card to see if that's better. The above errors crop up periodically in syslog whilst copying. Is the issue the card, the card reader, the PC, the drivers, ...? [1] I believe it to be genuine Sandisk, it was purchased from Amazon. Advice on how to verify it's not a fake welcomed! -- Mark Rogers // More Solutions Ltd (Peterborough Office) // 0844 251 1450 Registered in England (0456 0902) 21 Drakes Mews, Milton Keynes, MK8 0ER _______________________________________________ main(a)lists.alug.org.uk http://www.alug.org.uk/ http://lists.alug.org.uk/mailman/listinfo/main Unsubscribe? See message headers or the web site above!

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KDE 4.14 instead of Plasma
by Chris Walker 11 Jun '16

11 Jun '16

I have just installed a beta of Mageia 6. In the description online it says that KDE 4.14 can be installed - https://wiki.mageia.org/en/Mageia_6_Release_Notes#KDE in the traditional manner but I can't see how I might select it and I don't like Plasma. I selected KDE out of the three choices - KDE, Gnome or XFCE - when I installed Mageia and I fully expected to see the usual KDE desktop. But I don't. What do I have to do to make it work please? -- __ __| |_ __ __ .----------------------------------------------. / _/ _` \ V V / | mailto:alug_cdw@the-walker-household.co.uk | \__\__,_|\_/\_/ |______________________________________________|

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[ALUG Announce] ALUG Norwich Pub Meet Thursday 9th June
by Viperfang 06 Jun '16

06 Jun '16

ALUG Announce Please send announcements to Announce(a)lists.alug.org.uk Unsub, change settings via http://lists.alug.org.uk/mailman/listinfo/announce ----- Hello Norwich Aluggers, Our monthly ALUG Norwich social meeting will be held this Thursday, 9th June at The Coach and Horses (82 Thorpe Road, Norwich, NR1 1BA). The meeting officially starts at 8pm, although some people may arrive earlier. More information on those people can be found on the list and the IRC channel. If you are unsure if you will recognise us then make yourself and your intent to attend known by either posting on list or visiting us on IRC so we can look out for you rather than hiding in the corner. Optionally you could ask at the bar if they know where the geeky computer weirdos are and they'll point you in the right direction (seriously!). Another possibility is look for heaps of electronics on a table that may possibly look like movie props that would used for detonating explosives. Feel free to bring electronics/laptops/gadgets to the meet, you will by no means be alone. Ben Bewick aka Viperfang NB: This mail is automated, please refer to the usual sources for more information. ALUG Contact Details: Website : http://www.alug.org.uk/ IRC : #alug on irc.alug.org.uk List : http://lists.alug.org.uk/mailman/listinfo Twitter : http://twitter.com/anglianlug Identica: TBA Facebook: http://www.facebook.com/group.php?gid=2381613902 ----- Send discussion replies to main(a)lists.alug.org.uk (Reply-To set) Unsub, change settings via http://lists.alug.org.uk/mailman/listinfo/announce

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