Discuss July 2013

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167 participants
150 discussions

mixing MX and CNAME
by aurfalien 27 Aug '14

27 Aug '14

Hi, Has any one had problems with mail clients were your DNS is like this; doman.com MX 50 mail.domain.com domain.com MX 100 mail2.domain.com domain.com CNAME www.domain.com -aurf

8 12

Create Virtual Machine via HTTP or FTP
by cbulist＠gmail.com 08 Jun '14

08 Jun '14

Hi, I'm trying to create a Virtual Machine using Network Install mode (I tried HTTP and FTP). The HTTP/FTP server where the installation files are located is the Host Machine. The URL that I'm using is: http://192.168.1.104/inst and the Automatic detect option detects the OS without problem. When the installation starts I got an error: Unable to retrieve http://192.168.1.104/inst/images/install.img I tried different path but I always get the same error. The host machine is a Centos 6.2 (2.6.32.-220.el6.x86_64) I really appreciate any help with this problem. Thanks in advance,

5 7

idea: "hybrid" iso images?
by Joseph Spenner 30 Jan '14

30 Jan '14

In order to create a bootable CentOS installation USB thumb drive, there are several steps one must follow. The process often involves using a Windows box, which can be kinda annoying. The Linux Mint distro has what they call a "Hybrid" iso image. (see: http://community.linuxmint.com/tutorial/view/744 ) This image can be written to a thumb drive and used for installation simply by performing: # dd /path/to/image.iso of=/dev/sdb (where /dev/sdb is the thumb drive device). This thumb drive can now be booted and used for installation. The same image.iso file can be written to CD/DVD to create the installation media as well. Is this a complicated ISO build process? I'm frequently installing to systems without CD/DVD drives, so this would come in handy. Thanks! Regards, Joseph Spenner ______________________________________________________________________ If life gives you lemons, keep them-- because hey.. free lemons. "♥ Sticker" fixer: http://microflush.org/stuff/stickers/heartFix.html

4 6

Best configuration for encrypted software RAID 1?
by Dave Johansen 10 Oct '13

10 Oct '13

I'm setting up a computer with CentOS 6.4 and a mirrored software RAID. I would like it to be encrypted so I was wondering what the best configuration is. The only info I could find is http://lists.centos.org/pipermail/centos-docs/2008-October/001912.html but it appears to be a bit old and the info on the wiki ( http://wiki.centos.org/HowTos/EncryptTmpSwapHome ) doesn't seem to address RAIDs. My main question is will it be better to encrypt the RAID itself or the two partitions used by the RAID? Any other things I should be aware of? Thanks, Dave

4 12

Building CentOS 6.2 custom install media
by Daniel Drake 14 Sep '13

14 Sep '13

Hi, For the OLPC school server ("XS") we are planning to move from our dated F9 setup to CentOS 6.2. Thanks for all the effort involved in producing this distro. One important part of this project is a 'respin' of the install media - we need to add a handful of packages from external repositories, and maybe run a command late in the install. Are the scripts/configurations used to produce the CentOS official CD/DVDs available? I guess this would be our most reliable/sensible starting point. I am familiar with pungi, kickstart, anaconda, etc, so just a simple git link would be enough to get me started. Thanks, Daniel

5 7

Apple movie trailers on Centos6/Firefox
by Fred Smith 13 Sep '13

13 Sep '13

Hi all! Once again, Apple has messed with their trailers/website such that I can no longer play their trailers on Centos 6 (note that it still works fine on my two Fedora machines, F17 and F19, without any special settings. on Centos, I've long ago found that by setting the user agent to certain values I could make it work, but now that no longer helps. when I try to view a trailer all I get is a "download Quicktime" page. When I was running C5, I used mplayer plugin to do the video and it worked fine. after installing C6, I discovered that Totem also worked without the need to mess with mplayer installation. then all of a sudden, a couple weeks ago, it stopped working. at the same time, the choices they offered changed, so now they only offer "automatic", "480p" or "720p". this link is to one I can still play: http://trailers.apple.com/trailers/independent/elemental/ and this is a newer one I cannot: http://trailers.apple.com/trailers/disney/monstersuniversity/ I am (and have been) using the User Agent Switcher plugin for firefox (for several years) to make this all work, and until recently it has. Using that plugin, I find either of these settings has worked: useragent description="Quicktime 7.6.2" useragent="QuickTime/7.6.2 (qtver=7.6.2;os=Windows NT 5.1 Service Pack 3)" appcodename="Mozilla" appname="Netscape" appversion="5.0 (X11)" platform="Linux x86_64" vendor="" vendorsub="" or: useragent description="Google chrome" useragent="Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.19 (KHTML,like Gecko) Chrome/18.0.1025.168 Safari/535.19" appcodename="Mozilla" appname="Netscape" appversion="5.0 (X11)" platform="Linux x86_64" vendor="" vendorsub="" I'd appreciate hints on how to once again do a end-run around Apple's attempts to fence me out. Thanks! -- ---- Fred Smith -- fredex(a)fcshome.stoneham.ma.us ----------------------------- "And he will be called Wonderful Counselor, Mighty God, Everlasting Father, Prince of Peace. Of the increase of his government there will be no end. He will reign on David's throne and over his kingdom, establishing and upholding it with justice and righteousness from that time on and forever." ------------------------------- Isaiah 9:7 (niv) ------------------------------

2 2

What FileSystems for large stores and very very large stores?
by Eliezer Croitoru 09 Aug '13

09 Aug '13

I was learning about the different FS exists. I was working on systems that ReiserFS was the star but since there is no longer support from the creator there are other consolidations to be done. I want to ask about couple FS options. EXT4 which is amazing for one node but for more it's another story. I have heard about GFS2 and GlusterFS and read the docs and official materials from RH on them. In the RH docs it states the EXT4 limit files per directory is 65k and I had a directory which was pretty loaded with files and I am unsure exactly what was the size but I am almost sure it was larger the 65k files per directory. I was considering using GlusterFS for a very large storage system with NFS front. I am still unsure EXT4 should or shouldn't be able to handle more then 16TB since the linux kernel ext4 docs at: https://www.kernel.org/doc/Documentation/filesystems/ext4.txt in section 2.1 it states: * ability to use filesystems > 16TB (e2fsprogs support not available yet). so can I use it or not?? if there are no tools to handle this size then I cannot trust it. I want to create a storage with more then 16TB based on GlusterFS since it allows me to use 2-3 rings FS which will allow me to put the storage in a form of: 1 client -> HA NFS servers -> GlusterFS cluster. it seems to more that GlusterFS is a better choice then Swift since RH do provide support for it. Every response will be appreciated. Thanks, Eliezer

7 13

MP3 Tagger
by Mark LaPierre 09 Aug '13

09 Aug '13

Is there any good tagger for CentOS 6? -- _ °v° /(_)\ ^ ^ Mark LaPierre Registered Linux user No #267004 https://linuxcounter.net/ ****

5 5

run script on cron job only run on first Saturdat every month???
by mcclnx mcc 05 Aug '13

05 Aug '13

we have CENTOS 5.5 on DELL server. One of our script need run on first Saturday every month. We have following setup on cron job but it run every Saturday. 15 04 1-7 * 6 /home/app/oracle/backup/monthlybk.sh Any one know how to fix it? Thanks.

15 20

Re: [CentOS] surveillance DVR
by m.roth＠5-cent.us 04 Aug '13

04 Aug '13

Brian Mathis wrote: > On Wed, Jul 31, 2013 at 10:33 AM, <m.roth(a)5-cent.us> wrote: >> Arun Khan wrote: >> > On Wed, Jul 31, 2013 at 8:10 PM, <m.roth(a)5-cent.us> wrote: >> >> Does anyone know of a DVR that runs Linux that does NOT USE Active-X, and/or allows logging in directly? >> > >> > MythTV? It has a web UI. >> >> No joy, either this, nor zoneminder. Right now, we just have motion running on the servers that have the USB cameras plugged in; after the recent grief we had with the last upgrade to CentOS, when I wound up moving one camera that just would not work - the top 10% of the screen was fine, and the rest green, and the other I had to change the resolution to 240x360 to get it to not do that, my manager asked me to look into appliances that we could manage from our servers. >> >> We've found Zmodo, and another one, but with *both* of them, though the DVR that comes with the set is running Linux, web control *REQURES* IE, and you can't log in directly using ssh or telnet. > If the camera is running on Windows, you can probably stream directly from the device using ffmpeg. See here for details: > http://trac.ffmpeg.org/wiki/DirectShow > You would set the input as the camera and the output as a file, and add any codec options you want, etc... > > I'm sure there's probably a similar mode for Linux. If nothing else, you can probe the camera to see what modes it supports, etc..., to make sure you're picking one that works, > Ok, I *must* not have made clear what I was asking for. Let me try one more time.... We want an appliance, such as <http://www.zmodo.com/4ch-h-264-full-d1-dvr-500gb-hdd-with-4-cmos-480tvl-ir-…>, that we can put on our network, and manage, and d/l videos for long-term storage, onto a server. We have exactly, um, two? boxes running Windows, and we normally do *nothing* with them. We've over 100 servers running Linux, and that's where we live. Currently, the USB cameras are connected to ->CENTOS SERVERS<-, no WinCrap at all. We use the standard package motion to record for surveillance. We're looking for an "appliance", like the link I give above, that we can manage the same way that we manage an HP printer, which does *NOT* require IE, and we can do with firefox, or probably even konqueror. At the very least, we want to use, say, wget, to d/l the videos. NOTHING RUNNING WINDOWS!!!!!!!!!!!!!!!!!!!!!!!!!!!! Now, if I can calm myself down, have I made it clear what it is we're looking for? If so, can anyone recommend a source for such an appliance? mark

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Discuss July 2013