October 2019 - luv-main

DRI
by Russell Coker 14 Nov '19

14 Nov '19

Is there any way to disable DRI for an application? Kmail is using DRI and SEGVing in the Nouveau libraries. Not sure how much of this is Kmail bugs and how much is Nouveau (valgrind reports heaps of issues in Kmail and Nouveau triggers kernel bugs). But while investigating this I'd like to have Kmail keep working while not removing DRI entirely from the system. Any suggestions? -- Sent from my Huawei Mate 9 with K-9 Mail.

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Re: best external cd rom
by Petr Baum 29 Oct '19

29 Oct '19

On Tue, 29 Oct 2019 04:11:18 AM Rohan McLeod wrote: > Petr Baum wrote: > > On Tue, 29 Oct 2019 10:53:25 AM Rohan McLeod wrote: > >> Petr Baum via luv-main wrote: Rohan, > 1/ is the need for an "external" (typically USB) CD/DVD drive because > it needs to connect to a laptop ?; Yes, it is. I would probably copy recovered files to my internal (main) SSD drive first. > -the GUI files-utility correctly recognised a previously burnt M-Dsk as > 23GB (of a 25GB disk) >From what I came across reading of M-Disks is not a problem - but burning them may be. Somebody complained that his attempt to use M-Disk failed on Windows and it was suggested that he should use Nero. I would love to backup my historical photos on M-Disk as a second stage but I prefer to know the HW/SW combination which would be happy with my Ubuntu laptop before I go ahead with this project. Regards, Petr Baum -- <pb-luv(a)baum.com.au> Petr Baum, P.O.Box 2364, Rowville 3178 fax +61-3-97643342 This message was created in naturally virus-free operating system: Linux

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Re: best external cd rom
by Petr Baum 29 Oct '19

29 Oct '19

On Tue, 29 Oct 2019 10:53:25 AM Rohan McLeod wrote: > Petr Baum via luv-main wrote: Rohan, ... > > I have got a big box of about 25 years old CD ROM disks with scanned B/W > > 70-100 years old photo negatives. I was using copies from HDD for many > > years but failure of my server resulted in loss of significant part of > > files. I plan to make another set of copies from original CDs. ... > 3/ When I was investigating this issue I came to the conclusion that > "M-Disk"s were the best current solution; > this involves (a) buying an M-disk capable DVD R/W (most Blue-Ray > drives) (b) a supply of M-Disks (25- 100)GB ... That looks like an excellent suggestion! But... I tried to check Verbatim, who seems to be closest to the original developer Millenniata. They offer "External Slimline CD/DVD Writer" with notice "Software compatible with Windows operating systems only". That may mean included Nero burning SW only, but even that may be a show stopper - in discussion on another site somebody complained that his attempt to use M-Disk failed (on Win...) and it was suggested that he should use Nero. As Nero is included with Verbatim drive it may indicate that not all burning SW would be compatible. It would be nice if there would be some experience with using linux for burning of M-Disk. And I still have to find the best way how to recover data from my old and suspicious CDs... (M-Disk writer may be good enough for that too.) Regards, Petr Baum

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best external cd rom
by Petr Baum 28 Oct '19

28 Oct '19

Hi, I have got a big box of about 25 years old CD ROM disks with scanned B/W 70-100 years old photo negatives. I was using copies from HDD for many years but failure of my server resulted in loss of significant part of files. I plan to make another set of copies from original CDs. Some of these CDs had reading problems when new and it is unlikely that readability improved over time. I may use Roadkil's Unstoppable Copier and/or Ddrescue but as a first step I would like to get the best external CD ROM drive available for linux. Can you recommend me what to buy? Thanks, Petr Baum -- <pb-luv(a)baum.com.au> Petr Baum, P.O.Box 2364, Rowville 3178 fax +61-3-97643342 This message was created in naturally virus-free operating system: Linux

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MySQL developer wanted
by Andrew Pam 28 Oct '19

28 Oct '19

I have a friend who is looking for someone to develop and support a tool to import approximately 4,500 products from a CSV file to WooCommerce (backed by a MySQL database). Please let me know if you would be able to help! Cheers, Andrew

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Power outage today, system fscked
by Andrew Greig 23 Oct '19

23 Oct '19

Hi All, Two events, Ubuntu update and power outage. I cannot access my btrfs RAID drives, system reports it is mounted as read only. Thunderbird is not working browsers are not working Sane scanner is working Darktable is reporting as running but not responsive. KPatience is not working So, in general, I have a system which boots but the programs are not starting properly. Is this a symptom of LockFiles not reporting correctly? If I cannot access my RAID drives I am in a world of pain. Any suggestions on how to solve this would be truly appreciated. Andrew Greig

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Re: Power outage today, system fscked
by Andrew Greig 23 Oct '19

23 Oct '19

Further information: On trying to mount the RAID file-system it failed because the fs was readonly. I normally have mc installed on every computer but it has disappeared on the desktop computer and I cannot install mc as the system is readonly. I figured I may have to edit the fstab and I use mc as I am not familiar with vim or vi. No luck there. Cheers Andrew

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Linux.conf.au 2020
by Andrew Pam 13 Oct '19

13 Oct '19

I've just booked my early bird tickets and flights to LCA2020 on the Gold Coast. Flights are cheap right now, get 'em while they last! Accommodation on the other hand is expensive as this year's conference is being held at the Gold Coast Convention Centre and not at a University, so there is no student accommodation available this year. Is anyone else going and would like to share a hotel room? Cheers, Andrew

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Renaming files
by Andrew Greig 09 Oct '19

09 Oct '19

Hi all, My camera has just ticked over 10,000 images in around 8 months, and so another folder has opened up on the SD card, prior to today the file folder was 100EOS5D, the new folder is 101EOS5D, but the counter has reset from 6H9A9999 to 6H9A0001. At this rate I cannot afford to have the same file numbers repeating in the same calendar year. I can go into the Camera and change the file numbering to 6J9Axxxx, but how can I run a bulk renaming of my Raw Files - not being a scripter I am at a (self imposed) disadvantage, I have tried to understand the several ways to achieve this,but I have not grasped it. Rename 6H9A0001.CR2 6J9A0001.CR2 Rename 6H9A0002.CR2 6J9A0002.CR2 Rename 6H9A0003.CR2 6J9A0003.CR2 Rename 6H9A0004.CR2 6J9A0004.CR2 to Rename 6H9A0085.CR2 6J9A0085.CR2 Any help would be gratefully received. Andrew Greig

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Re: Running a public DNS server at home - Is this safe?
by Rick Moen 07 Oct '19

07 Oct '19

Quoting David Zhan (david.zhan.list(a)gmail.com) > Hi everyone, Everyone: 'Hi!' > I am thinking about running a public DNS server (with Pi-Hole) at > home, but not sure if that's safe. Safe against what? In the security field, we tend to use concepts like 'threat model' and 'attack surface'. You may want to look those up and consider what your concerns are and how to articulate them. Exposing any network daemon to remote networks, not to mention the public Internet, necessarily expands your attack surface. This is why you should (1) not run public-facing software without compensating benefit, (2) be picky about which software option you elect to run and how it's configured, and (3) maintain your system, e.g., roll out necessary fixes that may addresss security problems in a timely manner. Relevant to that, you may be pondering choice of software. Here are some good maintained open-source DNS daemons available for Linux: Authoritative-only: ------------------ Knot DNS NSD for small/medium-sized deployments PowerDNS Authoritative Server for large sites YADIFA Recursive-only: -------------- Deadwood dnscache from djbdns/dbndns, which appears to be the best-maintained fork of djbdns PowerDNS Recursor Unbound Generally, I prefer NSD (auth-only) and Unbound (recursive-only). Notably absent from that list is BIND9. Some more details about that are in my DNS software bestiary: http://linuxmafia.com/faq/Network_Other/dns-servers.html If the category distinctions (authoritative, recursive, etc.) are unfamilary, my somewhat puckish allegory about the 'Village of Lan' (that I penned in 2010) may help: http://linuxmafia.com/~rick/lan.html > I planned to share this server with my friends in Melbourne but I > don't want them be able locate my home. Well, far be it from me to criticise what you say you want to do, but, FWIW, I long ago decided that, for my _own_ Internet presence, I would pointedly take the opposite approach, e.g., in the (totally discretionary) LOC (location) reference records I publish in my domain zones, e.g.: $ dig -t LOC linuxmafia.com. @ns1.linuxmafia.com. +short 37 25 53.825 N 122 11 52.128 W 15.00m 1m 10000m 10m $ In fact, to lampshade the joke, I also publish an 'ICBM address' on my personal Web page, accurate to about a centimetre, giving the exact location of my favourite chair in my living room. ICBM: 122.204196°W, 37.430410°N, 49.28 metres elevation I have it on good authority that my 'Here, let me make it trivial for you to determine the exact physical location of me and my computing gear' spooked at least a couple of people who set out to 'doxx' me and found it worrying that I rolled out the red carpet for them. ;-> > Questions: > > Will my user be able to locate my home accurately? > (To suburb is acceptable, but street is a bit scary......) Assuming you don't do as I do and flamboyantly publish that information in LOC records and ICBM address data, then the user's ability to do that would be limited to the accuracy of geoIP data, which also tends to cost money to the consumers of that data. Ever notice that Google News makes a guess at your physical location based on your public IP address? That's using geoIP services. But notice that it's fairly approximate, at most isolating the IP's location to a neighbourhood. and sometimes it's comically wrong, depending. > Will I be facing other risks? Of course you will. This is where you start studying security, the way we sysadmins do. One modest starting point, a piece I wrote about a LinuxWorld Expo security talk in 2000: http://web.archive.org/web/20080427075329/http://security.itworld.com/4352/… > P.S.: I will put that server behind a properly configured firewall, so > the server itself should be alright. {headdesk} Nope. Most people use 'firewall' to mean 'set of IP/port filter rulesets'. Consider a hypothetical example server. It has a minimally configured instance of NSD for authoritative nameservice to the public Internet, it runs Portable OpenSSH for remote administrative access, runs atop Linux, and has no other network services whatsoever. Therefore, the attack surface consists of: o code exposed on port 22 (SSH) o code exposed on port 53 (NSD) o Linux TCP/IP stack Add to that a 'properly configured firewall'. What does your attack surface now consist of? Answer: the same, except there is additional possible exposure to stack congestion on account of the netfilter rules. > > _______________________________________________ > luv-main mailing list > luv-main(a)luv.asn.au > https://lists.luv.asn.au/cgi-bin/mailman/listinfo/luv-main

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