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34753 discussions

cameras and CentOS
by Jobst Schmalenbach 19 Jun '10

19 Jun '10

Hi I want to put up a few cameras connected to a CentOS box. I currently have a box with one camera and that works (USB), I can take a pic (the script does that) and see that on a webpage. However, I want to have a couple of cameras a little further away (more than 5 meters). USB has a limit, I have tried that camera with a longer cable and it does not work ... so I need to route that in a different way. Are there equaly as cheap other moethods? Or can I use USB<-adapter->network cable<-adapter->USB? How can I get that to work? Jobst -- Student to Teacher: Sir, what's an oxymoron? .... Teacher to Student: Microsoft security. | |0| | Jobst Schmalenbach, jobst(a)barrett.com.au, General Manager | | |0| Barrett Consulting Group P/L & The Meditation Room P/L |0|0|0| +61 3 9532 7677, POBox 277, Caulfield South, 3162, Australia

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Cacti/snmp question
by Whit Blauvelt 19 Jun '10

19 Jun '10

Hi, Trying to follow the recipe at http://wiki.centos.org/HowTos/Cacti_on_CentOS_4.x Which has a bit of an update for 5.x, but no joy. Anyone know what this from Cacti should suggest? Data Query Debug Information + Running data query [9]. + Found type = '6 '[script query]. + Found data query XML file at '/var/www/cacti/resource/script_server/host_cpu.xml' + XML file parsed ok. + Executing script for list of indexes '/usr/bin/php -q /var/www/cacti/scripts/ss_host_cpu.php 127.0.0.1 1 2:161:500:1:10:public:::MD5::DES: index' + Executing script query '/usr/bin/php -q /var/www/cacti/scripts/ss_host_cpu.php 127.0.0.1 1 2:161:500:1:10:public:::MD5::DES: query index' + Found data query XML file at '/var/www/cacti/resource/script_server/host_cpu.xml' + Found data query XML file at '/var/www/cacti/resource/script_server/host_cpu.xml' + Found data query XML file at '/var/www/cacti/resource/script_server/host_cpu.xml' The problem is that's returning no information to Cacti to any of the SNMP queries. My whole goal here is to get something working to graph CPU core use on a handful of systems. Or is there a better tool than Cacti (or better documented - hopefully in the form of simple recipe rather than many haphazard - often out-of-date - pages of RTFM)? Cacti admits to serious security flaws, not that this'll go on the public net, but I'd be happier to run something safer nontheless. Thanks, Whit

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Upgrade
by tony.chamberlain＠lemko.com 19 Jun '10

19 Jun '10

I am currently running CentOS 4.5 (which, through many Yum updates) now appears to be CentOD 4.8. 4.8 is still rather old, but I havbe lots of stuff (files and stuff installed). I would like to install Fedora but I am worried about losing all the stuff I have. I would have to back everything up, uninstall/reinstall things, etc. I am wondering whether there is some way to upgrade to Fedora from CentOS without just having to reinstall everything? - Done.

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amazon ec2 and centos?
by Johnny Tan 18 Jun '10

18 Jun '10

Searching through the archives, it seems this topic has come up several times in the past 2.5 years. Did anyone ever take on the tasks of creating an official CentOS AMI? We're currently using the RightScale ones, but I think it'd be ideal to have a clean CentOS AMI with the current kernels. Karanbir, you seem to have been the one on CentOS side who has had the most conversations with Amazon. Is that conversation dead? If we had a small committee with members from this list, would that help in any way? Ranging from doing the bundling work, to utilizing our account reps within Amazon to help us push this along? johnny

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Re: [CentOS] 5.5 & gspca
by m.roth＠5-cent.us 18 Jun '10

18 Jun '10

> On 14/06/10 18:58, m.roth(a)5-cent.us wrote: >>> >>> The standalone gspca code is old and deprecated. It's now maintained as part of the Video4Linux v4l-dvb tree here: >>> >>> http://linuxtv.org/ <snip> > The main v4l-dvb tree is here - just grab the latest tarball and build it. Here if you don't see it: > > http://linuxtv.org/hg/v4l-dvb/archive/tip.tar.bz2 <snip> > Development work on the gspca branch appears to happen here: > > http://linuxtv.org/hg/~hgoede/gspca/ > > before being merged into the main v4l-dvb tree. > >>> Elrepo.org has a version built for el5 that supports many gspca based devices: >>> >>> http://elrepo.org/tiki/kmod-video4linux <snip> Ok, so I got the src rpm from el repo. Lessee, first I tried rpmbuild, and that failed, because it *required* xen-devel. So I grabbed the tarfile from /usr/src/redhat/SOURCES, unbzip2'd it, untar'd it, and did a make. And ten or so later, I had 265 kernel modules. I don't want or need to install all of that, so I tried just building gspca, and that failed with unresolved errors. Does anyone know if I can just install gspca*.ko, or even some subgroup of that, or is it dependent on other of the built modules? Two other notes: on an FC 13 box, I see that gspca literally comes with the kernel - does anyone have a clue whether part of that subsystem is available, or is that what I'm looking at, above? Finally, in googling, I found a UVC that's supposed to deal with most USB cameras. Does anyone know anything about it, or will I still need gspca? mark

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free ftp server
by MOKRANI Rachid 18 Jun '10

18 Jun '10

Hi, I'm looking a linux freeware for sharing file with a web browser interface - protect file by password, send link to download by email.... Something like the following service: https://www.yousendit.com/ http://www.hongkiat.com/blog/15-great-free-online-file-sharing-alternati ves/ The idea is to install this service in OUR server for sharing files beetwen other company. For differents reasons we don't want to store some files in other servers. Any idea about a software we can use in our local server ? Thanks. __________________________ Ce message (et toutes ses pièces jointes éventuelles) est confidentiel et établi à l'intention exclusive de ses destinataires. Toute utilisation de ce message non conforme à sa destination, toute diffusion ou toute publication, totale ou partielle, est interdite, sauf autorisation expresse. L'IFP décline toute responsabilité au titre de ce message. This message and any attachments (the message) are confidential and intended solely for the addressees. Any unauthorised use or dissemination is prohibited. IFP should not be liable for this message. Visitez notre site Web / Visit our web site : http://www.ifp.fr __________________________

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recognizing correct number of cores on CPU
by Jerry Geis 18 Jun '10

18 Jun '10

I just installed centos 5.5 x86_64 on a new HP laptop. It has the core i5 processor. only 1 cpu is detected should be 2. This has happened before. Is upstream not keeping up with new processors released and updating the kernel? I'd rather not go through the process again of putting a newer kernel on the machine and having something different out there than "stock" centos. Jerry

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BIND: listen-on and allow-recursion
by Niki Kovacs 18 Jun '10

18 Jun '10

Hi, I'm currently trying to get a grasp on DNS and Bind. I admit the documentation is quite confusing, either too laconic or way too detailed. So I'm trying to start from a working example, and then bite my way through it. I have a sample named.conf file from Carla Schroder's Linux Cookbook. In the opening global options, I have this : listen-on { 127.0.0.1; 10.11.12.1; }; allow-recursion { 127.0.0.0/8; 10.11.12.0/24; }; As far as I understand, the purpose of these two stanzas is to limit access to the DNS server to 1) the server itself and 2) the local 10.11.12.0/24 network. In that case, there seems to be some redundancy in the syntax. Correct me if I'm wrong. Can someone please explain (in plain words) the exact meaning of these stanzas ? Thanks, Niki

2 1

clustered file system of choice
by Boris Epstein 18 Jun '10

18 Jun '10

Hi all, I am just trying to consider my options for storing a large mass of data (tens of terrabytes of files) and one idea is to build a clustered FS of some kind. Has anybody had any experience with that? Any recommendations? Thanks in advance for any and all advice. Boris.

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How to measure file transfer speed?
by hadi motamedi 18 Jun '10

18 Jun '10

Dear All I have one centos server equipped with WiFi . I want to measure data rate speed on this connection . Is there any utility on my centos that can measure data speed on one specific Ethernet connection when transferring large size files through WiFi connection? Thank you

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