Discuss April 2018

discuss@lists.centos.org

90 participants
61 discussions

OT: thunderbird annoyance
by m.roth＠5-cent.us 30 Apr '18

30 Apr '18

Does anyone know if it's even possible to NOT cc myself when I hit reply all? Geez, that's what's in the sent folder.... mark

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formating DVR-RW
by Michael Hennebry 29 Apr '18

29 Apr '18

My Centos 6 wodim tell me that it can only format DVD+RW. I have DVD-RWs. Even when I format a DVD-RW on my standalone DVD recorder, wodim still will not write to it. Is there a centos-6-useable mechanism for formatting and writing DVD-RWs? -- Michael hennebry(a)web.cs.ndsu.NoDak.edu "Sorry but your password must contain an uppercase letter, a number, a haiku, a gang sign, a heiroglyph, and the blood of a virgin." -- someeecards

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Need help: I219-v driver issue in centos 7 installation
by dibyendukoley1 28 Apr '18

28 Apr '18

Sir, Can any one please help me to install I219-V driver. The driver that is provided by intel that is for freebsd only. I have tried of installing e1000e driver but no luck.... Please help.... Looking forward to you.

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CentOS events for 2018/2019
by Rich Bowen 27 Apr '18

27 Apr '18

TL;DR: What events should we go to? Tell me at https://goo.gl/forms/kLZ2y1H1jRSy4NdC3 (Cross-posting from promo@ mailing list, to get a wider participation. Thanks!) Looking at the coming 12 months, I need some feedback as I select events that need to have a CentOS presence of some kind. While I have already committed to some of these events (See below), starting around July we haven't really signed on for much, and I would like to hear from the community what events you feel we should be at, and why. The why is, by far, the more important half of the question. Why, as in, what story do we want to tell there; who are we trying to tell that story to; what would be a positive outcome from being there. First, here are the events that I am already committed to: May 8-10: Red Hat Summit - https://www.redhat.com/en/summit/2018 June 25-28: ISC-HPC (SuperComputing) Frankfurt - https://www.isc-hpc.com/ October 1-3: cPanel, Houston - https://conference.cpanel.com/ November 12-15: SuperComputing 18, Dallas - https://sc18.supercomputing.org/ February 2-3 (assumed): FOSDEM, Brussels - http://fosdem.org The story at Red Hat Summit is that CentOS (and, specifically, our SIGs) is the platform for innovation, and the source of all of Red Hat's products, as well as projects and products that continue to invent the industry. The story at the SuperComputing events is what I have been tweeting "SuperComputing is #PoweredByCentOS" - which is incontrovertibly true. The top 500 supercomputers in the world are overwhelmingly CentOS. We attend cPanel because the web hosting business, and in particular cPanel-backed sites, are overwhelmingly running on CentOS. FOSDEM - because it's FOSDEM. Events where we could have a presence are, of course, legion. We can continue to do the events that we did last year, and the year before, and that would be fine. Or we can try to visit some other industry segment where we'd like to shine brighter. I've made a Google Form at https://goo.gl/forms/kLZ2y1H1jRSy4NdC3 listing the events that I'm currently considering, but also providing space for you to tell me what events I'm not thinking about yet. Finally, please note that I'm not just talking about me going to stuff, but, rather, identifying the right people that should be at these events, and sending them to represent us - CentOS Ambassadors, if you will. -- Rich Bowen - rbowen(a)redhat.com @RDOcommunity // @CentOSProject // @rbowen

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Re: [CentOS] formating DVR-RW
by Thomas Schmitt 27 Apr '18

27 Apr '18

Hi, i am upstream developer of libburn. Nevertheless, the following is intended to be purely technical info, not advertising. Better do not use wodim with DVD media. It was forked from a CD-only version of cdrecord and got added not-so-skilled code for operating DVD. One should use dvd+rw-tools or a program that has libburn as backend. I am not aware whether cdrecord is meanwhile willing to format DVD-RW. With dvd+rw-tools and according to an old cheat sheet of mine, a DVD-RW gets formatted like this: dvd+rw-format -force /dev/sr0 (Iirc, the option -force was needed if there is already an ISO filesystem on the medium.) libburn's frontend cdrskin has a command line interface that is roughly compatible to wodim or cdrecord. (There are also Xfburn, xorriso, and Brasero's libburn plugin.) A formatting run looks like this: cdrskin -v dev=/dev/sr0 blank=format_overwrite Fred Smith wrote: > Why would one format a cd/dvd? DVD-RW can have two states: unformatted sequential and formatted to "restricted" overwritable. The latter can take 32 KiB chunks of write data at 32 KiB-aligned addresses. It does not have to be blanked before re-use. growisofs and libisoburn can do multi-session on it, like they do with DVD+RW, DVD-RAM, BD-RE. Unformatted DVD-RW behave much like DVD-R (which is good for testing). Blanking them for re-use is only swift if you do not want to do multi-session on the blank medium. For multi-session they must be blanked fully, which lasts as long as a full write run. My own experince since 2004 is that formatted DVD-RW can be re-used more often before they die. Unformatted DVD-RW seem to be less long living. The older the drive, the earlier they fail. Giles Coochey wrote: > In order to delete something that you had previously written to it? Formatted DVD-RW can be used as random access read-write device by help of buffering device /dev/pktcdvd* created by pktsetup(1). But this is an invitation for trouble, as is with the other overwritable optical media types. Random access is slow and the frequent overwriting of particular media blocks reduces life time. (The other overwritable DVD and BD types need no /dev/pktcdvd* because they can be used for addressing with 2 KiB granularity.) Nataraj wrote: > I suggest that you try xorriso. Thank you for flying xorriso. :)) It has a cdrecord-wodim-compatibility mode described in man 1 xorrecord. Formatting is done by: xorrecord -v dev=/dev/sr0 blank=format_overwrite The native command mode is more versatile but demands learning new names and new rules. See man 1 xorriso. xorriso -outdev /dev/sr0 -format as_needed The mode "as_needed" formats what can be formatted and is not formatted yet. It throws no error if the medium is not suitable for formatting. Have a nice day :) Thomas

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Question about "generic" USB <=> Serial Port kernel drivers...
by Robert Heller 27 Apr '18

27 Apr '18

OK, I am running CentOS 6 on my Laptop and Desktop, presently kernel version 2.6.32-696.20.1.el6.x86_64 (yes, a version or so out of date -- I'll probably do an update soon -- non-trivial since my Internet connection is via dialup). I recently bought a couple of Adafruit Arduino compatibles, a Flora and a Metro 328. Hooking up the Flora and the Metro to a Raspberry Pi running Raspbian (kernel 4.9.35-v7+), tells me that the Metro 328's USB uses a FTDI USB serial interface (ftdi_sio.ko) and the Flora uses the cdc_acm (cdc-acm.ko) USB serial interface. Both of these drivers are available with CentOS 6's kernel, but since Adafruit uses their own Vendor & Product IDs and my (old) kernel's ftdi_sio and cdc-acm drivers don't have Adafruit Vendor & Product IDs, the drivers don't automagically connect. The ftdi_sio has parameters for the Vendor & Product IDs, and specifing the product ID for the Metro 328 allows the driver to latch onto the Metro 328's USB connect and things work (I get a /dev/ttyUSB0 device). The cdc-acm does not have any parameters and I don't see any way to get it to connect. I am pretty sure all Adafruit did was change the programming of the USB chip to have their Vendor & Product IDs and the driver should work (the FTDI one does, once the Vendor & Product IDs are passed to it). My question: since the cdc-acm is not parameterized, I am guessing I need to get the kernel module source (from RH's kernel source RPM? Or maybe Elrepo has it?), hack in the Adafruit Vendor & Product IDs into its table of Vendor & Product IDs and recompile it. Is this correct? Also: is there some "trick" that allows me to create a kernel module that will work with kernel updates, without having to re-compile it after every kernel update? -- Robert Heller -- 978-544-6933 Deepwoods Software -- Custom Software Services http://www.deepsoft.com/ -- Linux Administration Services heller(a)deepsoft.com -- Webhosting Services

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Posting check
by Robert Heller 27 Apr '18

27 Apr '18

I am wondering if I am able to post to the CentOS list. -- Robert Heller -- 978-544-6933 Deepwoods Software -- Custom Software Services http://www.deepsoft.com/ -- Linux Administration Services heller(a)deepsoft.com -- Webhosting Services

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Postfix config problem w/ tls
by Chuck Campbell 26 Apr '18

26 Apr '18

I have followed the guides on setting up postfix relay to my account at network solutions. I added these to main.cf: inet_interfaces = localhost relayhost = [mail.mydomain.com]:587 smtp_sasl_auth_enable = yes smtp_sasl_security_options = noanonymous smtp_sasl_password_maps = hash:/etc/postfix/sasl_password smtp_use_tls = yes smtp_tls_CAfile = /etc/pki/tls/certs/sendmail.pem The username and password are correct, and all these options work fine from thunderbird on a windows box in my local network. I get no errors on postfix restart, but when I try to send an email from the centos box, I get this: Apr 26 17:00:33 host postfix/smtp[10627]: C9C1D80075: to=<campbell(a)somedomain.com>, relay=mail.mydomain.com[xxx.xxx.xxx.xxx]:587, delay=0.87, delays=0.08/0.02/0.72/0.04, dsn=5.0.0, status=bounced (host mail.mydomain.com[xxx.xxx.xxx.xxx] said: 503 you must authenticate first (#5.5.1) (in reply to MAIL FROM command)) Why is tls not authenticating? Under centos 5 I used sendmail, and it all worked just fine. -chuck -- ACCEL Services, Inc.| Specialists in Gravity, Magnetics | (713)993-0671 ph. | and Integrated Interpretation | (713)993-0608 fax 448 W. 19th St. #325| Since 1992 | (713)306-5794 cell Houston, TX, 77008 | Chuck Campbell | campbell(a)accelinc.com | President & Senior Geoscientist | "Integration means more than having all the maps at the same scale!"

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[OFF-TOPIC] Reminder to tighten ALL types of security
by Always Learning 25 Apr '18

25 Apr '18

This posting is off-topic because it is not about Centos. Please refrain from replying to the list as that will generate further off-topic traffic inevitably irritating subscribers. On the balance of probabilities, I think everyone will benefit from reading at least the first 6 pages of a 19 pages English criminal sentencing statement about a child, in England, successfully breaking into the home and business computer systems of top USA CIA, FBI and Homeland Security entities. It is shocking and disquieting. Security is more than a firewall and SELINUX - it is procedures too. When the CIA director is easily hacked and his family pestered, how safe are you and your systems ? In the Crown Court at Leicester (England) The Queen versus Kane Gamble Sentenced at the Central Criminal Court (Old Bailey, London) 20 April 2018 Sentencing remarks of Mr Justice Haddon-Cave https://www.judiciary.gov.uk/judgments/r-v-kane-gamble-sentencing-remarks-o… https://www.judiciary.gov.uk/wp-content/uploads/2018/04/r-v-gamble-sentenci… P. -- Regards, Paul. England, EU. England's place is in the European Union.

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Vmware - Slightly off topic
by Jerry Geis 25 Apr '18

25 Apr '18

Hi All, What is the correct way to provide a CentOS 7 - WMware image for ESX ? As an amateur to VMware - I thought - great I can get VMplayer and ESX should be able to import my image... Wrong... I even went through the trouble of "converting" to VMWare workstation and thinking ESX could import that - Apparently still Wrong... I cannot for the life of me understand how one product family is so incompatible with itself. But that is another story. I just want to be able to provide a pre-built image with CentOS 7 and my other programs on a bootable VMware image that is easily imported into any VMware platform - Workstation, ESX or other. How is that accomplished ? Thanks for your thoughts and experience. Jerry

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Discuss April 2018