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Re: [CentOS] Design changes are done in Fedora
by James B. Byrne 12 Jan '15

12 Jan '15

On Fri, January 9, 2015 17:36, John R Pierce wrote: > On 1/9/2015 2:32 PM, Always Learning wrote: >> Enterprise, in the RHEL context, suggests stability or have I >> misunderstood the USA definition of "Enterprise" ? > > > Enterprise to me implies large business Enterprise literally means 'undertaking'. It has been used euphemistically since the later 1980s as a code word for associations having a legally recognised form that operate for some sensibly describable outcome. So one has large, medium and small enterprises, not-for-profit enterprises, commercial enterprises, social enterprises and so forth. > Businesses that don't adapt to external changes become fossils > and die off. The greatest threat to the survival of any organism or organisation is a change to its environment. It is because of this that widespread adoption of so much innovation is delayed using societal pressure. This is not done entirely out of narrow self-interest but from a sensible appreciation of the limits to the speed at which people can adapt to change. As is noted elsewhere, change is inevitable. But there are many kinds of change. For instance, there is the change wrought by sudden and dramatic increases in productivity. How many here are cognisant of the fact that the O2 steel making process introduced in the 1950s lowered the labour content of a Tonne of steel by three orders of magnitude? Without that single change much of what we invisibly accept as part of the urban landscape today would not exist. Without that change it is likely that Bethlehem and Republic would still be in business. Without that change hundreds of thousands would still be employed in the steel mills of North America. Then there is fashion. An enterprise has its hands full with just dealing with the former type of change. It can ill afford to waste resources on the later. With respect to RHEL7 the question is: Which are we dealing with, substance or fashion? Or rather, which type predominates? I have no argument against claiming the switch to xfs is substance, not fashion. But then again that change over, however beneficial, is nearly invisible to most of us; subsumed as it is in the overarching effort of setting up a new system from scratch. Once a host is set up its file-system certainly has little further discernible day-to-impact upon anyone, much less end-users. But Gnome3? Systemd? These seem highly intrusive changes that directly affect, often negatively, the daily tasks of many people. Are these substance or fashion? Do the changes they make fundamentally improve RHEL or just do the same things a little differently? How much is it worth to an Enterprise to have a similar desktop metaphor on the workstation as on a tablet? How many desktop workstations will be replaced by the smart-phone, the tablet? I do not have an answer but I suspect, not much and not many. What does systemd buy the enterprise that sysinit did not provide? Leaving aside upstart as a sterile diversion. I am not certain of anything here either. I have learned that my initial resistance to change, any change, is just as emotionally charged as that of the next person. So, I tend to wait and see. But, I do ask questions. If only to discover if I am alone in my concerns. I am but one person and I need the views of others, agreeable or disagreeable to my prejudices as the case may be, so as to form an informed opinion. I am admittedly somewhat concerned about the overall direction of the RHEL product. I fundamentally disagree with their Frozen Chosen approach to key software components. And with the lock-step forced upgrades that are the result. I am not at all certain that back-porting security fixes to obsolescent software is a profitable activity when often for much the same effort, if not less, the most recent software could be made to run on the older release without adverse effects elsewhere. However, I offer no answers and promote no particular course of action, saving only reflection of what is happening now and the price that is paid for it. I am simply seeking the alternative views of others on these issues. -- *** E-Mail is NOT a SECURE channel *** James B. Byrne mailto:ByrneJB@Harte-Lyne.ca Harte & Lyne Limited http://www.harte-lyne.ca 9 Brockley Drive vox: +1 905 561 1241 Hamilton, Ontario fax: +1 905 561 0757 Canada L8E 3C3

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C-6, Gnome question
by Fred Smith 12 Jan '15

12 Jan '15

Hi all! Using the default Gnome desktop on Centos-6, I keep having difficulty getting the mouse pointer to lineup exactly on the edge/corner of a window when I want to resize the window. It seems that you have to have it on a line exactly one pixel in width, and I'm finding it increasingly hard to do (who, me? getting old? nah!) Wondering if there is a gnome setting somewhere among the myriad settings that could be used to configure the accuracy with which the mouse pointer must be placed so one can grab edges of things. I've dug thru the settings in the Gnome configuration editor, but so far nothing leaps out at me. Can anyone offer advice? thanks! -- ---- Fred Smith -- fredex(a)fcshome.stoneham.ma.us ----------------------------- The Lord detests the way of the wicked but he loves those who pursue righteousness. ----------------------------- Proverbs 15:9 (niv) -----------------------------

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Re: [CentOS] UC C-6, Gnome question
by Bill Maltby (C4B) 12 Jan '15

12 Jan '15

On Mon, 2015-01-12 at 14:40 +0000, Rushton Martin wrote: > <snip> > Another Firefox "funny" to be aware of occurs if you have a $HOME shared between multiple machines. Firefox will refuse to start on the second machine whilst the first is running Firefox, it believes that there is already an instance running. Rebooting the second machine will not help. The quick-and-dirty way around this is to log in as a different user (and hence different $HOME) on the second machine. That sort of stuff gets my back up, wondering who the hell is making these design changes. Not folks that are aware of how stuff is used in the "real world? Not folks who understand the concept of "regression testing"? Not folks who look outside their walls and solicit comment from their victims? I don't know, but I get obnoxiously resistant (often to my own detriment) in such cases and tend to do things like my patch. Yep, long-term potential negatives, but sometimes it's worth it to me. E.g., a very long time ago, device drivers for network cards did not work well for a particular card I was using. So I grabbed the code and "Holy Crap". What a piss-poor bunch of code. And it didn't handle the hardware properly either. So I got the technical docs for the card, modified the driver, tested every edge condition I could think of and, when satisfied, made a patch and got it ready for contribution. Well, they changed maintainers while I was doing all that and the new code set was so far off what I was working with that my patch became useless. So I just used my driver for myself, making my effort worthwhile, but I wouldn't have been so stringent in the testing and commentary in the code if I had known what was happening. So it cost me some extra time and effort. > > <snip> MHO, Bill

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Re: [CentOS] Camera doesn't works after "yum upgrade"
by Patrick Begou 12 Jan '15

12 Jan '15

m.roth wrote: > Patrick Begou wrote: >> Thanks Marc for your answer, I have a /dev/video0 but no /dev/video. > ^^^^ (it's mark) >> Should I create a link ? >> Or a new rule in udev ? > Oh, no - the question was whether /dev/videoX existed at all. Since you > say that it does, the next question is whether there are messages in > /var/log/messages, dmesg, or perhaps camera even has its own logfile? > > mark Hi Mark, The /dev/video0 exists and the cheese application (used for testing) seams to find it. But the menu for choosing the camera is greyed as if it was unusable. The message I get in /var/log/messages is: kernel: uvcvideo: Failed to query (GET_DEF) UVC control 6 on unit 2: -110 (exp. 2). each time I launch the cheese application. Patrick -- =================================================================== | Equipe M.O.S.T. | | | Patrick BEGOU | mailto:Patrick.Begou@grenoble-inp.fr | | LEGI | | | BP 53 X | Tel 04 76 82 51 35 | | 38041 GRENOBLE CEDEX | Fax 04 76 82 52 71 | ===================================================================

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Re: [CentOS] UC C-6, Gnome question
by Thomas Eriksson 12 Jan '15

12 Jan '15

On 01/12/2015 06:40 AM, Rushton Martin wrote: > > Another Firefox "funny" to be aware of occurs if you have a $HOME > shared between multiple machines. Firefox will refuse to start on > the second machine whilst the first is running Firefox, it believes > that there is already an instance running. Rebooting the second > machine will not help. The quick-and-dirty way around this is to log > in as a different user (and hence different $HOME) on the second > machine. > Or use a second profile, 'firefox -ProfileManager'. -Thomas

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Re: [CentOS] UC C-6, Gnome question
by Rushton Martin 12 Jan '15

12 Jan '15

>> On Sun, Jan 11, 2015 at 05:12:48PM -0500, Bill Maltby (C4B) wrote: >> > On Fri, 2015-01-09 at 19:42 -0500, Fred Smith wrote: >> > <snip> > >> > In a nutshell, after I would terminate Firefox as part of my normal >> > log off process, there would be another instance of Firefox left >> > hanging around with a ppid of 1 (so it's daemonized", or as I prefer >> > "demonized" ;-)) and using all the CPU it could get (97%-99% of a 6 >> > core AMD in my desktop) while no Firefox windows were open. Figuring >> > it might be saving stuff I checked back many minutes later on many >> > days and cycles and it was always there. Moreover, when normally >> > using Firefox I'd seen 103%, 104% CPU usage etc. >> >> I commonly also find a "stray" firefox running after stopping firefox, >> and it isn't using a window either. it's a nuisance because, when >> there's a firefox update and it wants to restart the browser, it can't >> because there's that darn "stray" one hanging around. Another Firefox "funny" to be aware of occurs if you have a $HOME shared between multiple machines. Firefox will refuse to start on the second machine whilst the first is running Firefox, it believes that there is already an instance running. Rebooting the second machine will not help. The quick-and-dirty way around this is to log in as a different user (and hence different $HOME) on the second machine. This email and any attachments to it may be confidential and are intended solely for the use of the individual to whom it is addressed. If you are not the intended recipient of this email, you must neither take any action based upon its contents, nor copy or show it to anyone. Please contact the sender if you believe you have received this email in error. QinetiQ may monitor email traffic data and also the content of email for the purposes of security. QinetiQ Limited (Registered in England & Wales: Company Number: 3796233) Registered office: Cody Technology Park, Ively Road, Farnborough, Hampshire, GU14 0LX http://www.qinetiq.com.

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Lvm snapshot problem
by Cristian Del Carlo 12 Jan '15

12 Jan '15

Hi list, i have an error when i do an lvm snapshot. The error is like this when i use the command "/sbin/lvcreate -L20G -s -n <snapshot> /dev/vgraid/vm" : *semid 5013504: semop failed for cookie 0xd4d23a8: incorrect semaphore state* * Failed to set a proper state for notification semaphore identified by cookie value 223159208 (0xd4d23a8) to initialize waiting for incoming notifications.* I use centos 7 with this packages: # rpm -aq | grep kernel kernel-3.10.0-123.9.3.el7.x86_64 # rpm -aq | grep lvm2 lvm2-libs-2.02.105-14.el7.x86_64 lvm2-2.02.105-14.el7.x86_64 I read that the problem is related to udev : # zgrep UEV /proc/config.gz CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug" # grep UEV /boot/config-3.10.0-123.9.3.el7.x86_64 CONFIG_UEVENT_HELPER_PATH="" CONFIG_DM_UEVENT=y I can not understand the problem. The server is in a server farm with a lot of VM running I would like to solve the problem without restarting the server. Could you help me? Thanks. -- -------------------------------------------------------- Cristian Del Carlo Il testo e gli eventuali documenti trasmessi contengono informazioni riservate al destinatario indicato. La seguente e-mail è confidenziale e la sua riservatezza è tutelata legalmente dal Decreto Legislativo 196 del 30/06/2003 (Codice di tutela della privacy). La lettura, copia o altro uso non autorizzato o qualsiasi altra azione derivante dalla conoscenza di queste informazioni sono rigorosamente vietate. Qualora abbiate ricevuto questo documento per errore siete cortesemente pregati di darne immediata comunicazione al mittente e di provvedere, immediatamente, alla sua distruzione. --------------------------------------------------------

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Thunderbird randomly segfaults at startup
by Robert Nichols 12 Jan '15

12 Jan '15

Anyone else seeing this? This is happening on a straight "Desktop" install of CentOS 6.6 fully updated. I have made no changes other than installing Thunderbird. Thunderbird will occasionally (10 to 20% of the time) fail to start, and the abrt report indicates a signal 11 (SIGSEGV). I don't see any other reports of this. Is no one using Thunderbird these days? Do abrt reports submitted from CentOS go anywhere useful these days? I saw some discussion a while back, but don't recall the results. Should I submit one? -- Bob Nichols "NOSPAM" is really part of my email address. Do NOT delete it.

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logrotate script not working
by Tim Dunphy 11 Jan '15

11 Jan '15

Hey guys, Got a quick question and I hope this is an easy one! In my /etc/logrotate.conf file I have the following entry: # rotate all of the apache logs -- we'll rotate them here /var/log/mysqld.log { weekly size 50M create 0644 mysql mysql rotate 1 } And from that I would expect the log to rotate when it reaches 50M in size. However I just caught that log weighing in at 356MB!! So how can I get this log file to rotate when it hits 50MB? Any ideas, advice and help at all would be appreciated. Thanks Tim -- GPG me!! gpg --keyserver pool.sks-keyservers.net --recv-keys F186197B

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Intel NUC? Any experience
by david 11 Jan '15

11 Jan '15

Folks The price point of Intel's NUC unit makes it attractive to use as a server that doesn't have significant computational load. In my environment, a USB connected hard-drive could provide all the storage needed. I wonder if anyone has had experience with it, and can answer: 1) Does Centos6 and/or Centos7 install from a USB connected optical drive? or a USB flash drive? I'd prefer to do a NetInstall. If the answer is essentially no, there's no point in continuing. 2) Is the Ethernet connection supported by NetInstall and the subsequent OS? 3) Is it possible to add an additional NIC for possible use as a home router/gateway? If not internally, then via a USB connected NIC? Any thoughts on the subject would be appreciated. David San Francisco

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