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scanning under CentOS
by Boris Epstein 09 Mar '11

09 Mar '11

Hello listmates, I've got an HP Officejet 7110 All-in-One Printer which I am trying to get to scan for us. Details on the printer/scanner/FAX here: http://h10025.www1.hp.com/ewfrf/wc/product?cc=us&lc=en&dlc=en&product=91472 Now xsane seems to handle individual pages OK but multiplage scans through the ADF - that seems to be a complete mess. Hence the questions: 1) Is there a good scanner interface package that would allow me to just load the paper into the ADF, say "go" and watch the scanner go through the pages I've put in and produce an output file when it's done? 2) Has anyone worked with the scanner I am trying to use? What was your experience like when you did? Thanks. Boris.

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Security updates for CentOS-5
by Mark Foster 09 Mar '11

09 Mar '11

Hello, I was wondering why there haven't seemed to be any security updates for centos-5 since Jan 6. Per https://rhn.redhat.com/errata/rhel-server-errata.html there are a ton of outstanding issues. Thanks. -- Mark D. Foster <mark(a)foster.cc> http://mark.foster.cc/

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kernel vulnerabilities
by Riccardo Veraldi 09 Mar '11

09 Mar '11

Hello, I am using CentOS 5.5 I planned to update the kernel rpm because of vulnerabilities came out lately. The new redhat updated kernel would be 2.6.18-238.5.1.el5 Also Scientific Linux did and update to the kernels according to redhat advisories but I have seen that CentOS is still bound to kernel 2.6.18-194.32.1.el5 so no security update is available. I was wondering if this is normal or not. thank you Riccardo

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Re: [CentOS] Server hangs on CentOS 5.5
by Leen de Braal 09 Mar '11

09 Mar '11

> On Wed, Mar 9, 2011 at 10:24 AM, Leen de Braal <ldb(a)braha.nl> wrote: >>> m.roth(a)5-cent.us wrote: >>>> Michael Eager wrote: >>> >>>>> House-built, Gigabyte MB, AMD Phenom II X6, 6Gb RAM. >>>> >>>> Any chance the problem's with the video card? >>> >>> Video is on the MB. It doesn't seem likely that it's >>> the video, since the system doesn't respond to network >>> when it crashes. >>> >>> It could be anything. That's why I'm looking for >>> something that would give me a bit of a hint what >>> to look at. With an infrequent failure, it's not >>> practical to replace components piecemeal. >> >> While you open the case, check for the bulging capacitor problem. >> Will have the effect you describe, freezing up the system so that even >> bios routines don't work (your fans). >> If that's the case, replace mainboard. >> > > > Or replace the CAPS if you're not afraid of a soldering iron :) Very often resulting in a damaged board, because you damage the via's when pulling the caps. But it is worth a try. > > > > -- > Kind Regards > Rudi Ahlers > SoftDux > > Website: http://www.SoftDux.com > Technical Blog: http://Blog.SoftDux.com > Office: 087 805 9573 > Cell: 082 554 7532 > -- L. de Braal BraHa Systems NL - Terneuzen T +31 115 649333 F +31 115 649444

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/etc/hosts - hostname alias for 127.0.0.1
by Sean Carolan 09 Mar '11

09 Mar '11

Can anyone point out reasons why it might be a bad idea to put this sort of line in your /etc/hosts file, eg, pointing the FQDN at the loopback address? 127.0.0.1 hostname.domain.com hostname localhost localhost.localdomain

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connection speeds between nodes
by wessel van der aart 09 Mar '11

09 Mar '11

Hi All, I've been asked to setup a 3d renderfarm at our office , at the start it will contain about 8 nodes but it should be build at growth. now the setup i had in mind is as following: All the data is already stored on a StorNext SAN filesystem (quantum ) this should be mounted on a centos server trough fiber optics , which in its turn shares the FS over NFS to all the rendernodes (also centos). Now we've estimated that the average file send to each node will be about 90MB , so that's what i like the average connection to be, i know that gigabit ethernet should be able to that (testing with iperf confirms that) but testing the speed to already existing nfs shares gives me a 55MB max. as i'm not familiar with network shares performance tweaking is was wondering if anybody here did and could give me some info on this? Also i thought on giving all the nodes 2x1Gb-eth ports and putting those in a BOND, will do this any good or do i have to take a look a the nfs server side first? thanks, Wessel

6 17

what is the “Online Certificate Status Protocol”
by erikmccaskey64 09 Mar '11

09 Mar '11

I use privoxy. In the user.action file i have a redirect rule and a few websites: { +redirect{s@http://@https://@} } .twitter.com .facebook.com Ok! it's working great, e.g.: if i visit any "*twitter.com" URL it gets redirected to HTTPS! But: with wireshark i can see some "OCSP" packets [ http://en.wikipedia.org/wiki/Online_Certificate_Status_Protocol ] Question: What are these packets? Why aren't there in HTTPS? Is my redirection method with privoxy is secure? Thank you for any tips/opinions!

2 1

Re: [CentOS] Internet connection sharing?
by hadi motamedi 09 Mar '11

09 Mar '11

On 3/8/11, Rudi Ahlers <Rudi(a)softdux.com> wrote: > On Tue, Mar 8, 2011 at 12:09 PM, hadi motamedi <motamedi24(a)gmail.com> wrote: >> On 3/8/11, Jakub Jedelsky <jakub.jedelsky(a)gmail.com> wrote: >>> Dne 8.3.2011 10:19, hadi motamedi napsal(a): >>>> Dear All >>>> My centos machine is connected to my MS Windows machine on the net.The >>>> MS Windows machine is connected to Internet via valid IP address >>>> setting and on its secondary ip address setting it can see my centos >>>> machine on the intranet.Can you please let me know how can try for >>>> Internet connection sharing such that my centos machine can see >>>> internet with minor modifications done? >>>> Thank you in advance >>> >>> Hi hadi, >>> >>> this isn't centos thing, all you need is to configure network bridge on >>> your Windows machine. You didn't send info about your windows verison so >>> try to google something about it >>> (http://www.google.com/#q=windows+network+bridge) >>> >>> JJ >>> _______________________________________________ >>> CentOS mailing list >>> CentOS(a)centos.org >>> http://lists.centos.org/mailman/listinfo/centos >>> >> Thank you very much for your reply.I am familiar with internet >> connection sharing on MS Windows as I have a third XP client on the >> same net connected to the internet.I tried as the following on my >> centos: >> #route add -net default gw 172.18.209.1 >> Where this is the secondary ip address of the MS Windows host.But the >> centos cannot see the internet. Can you please let me know why? >> _______________________________________________ > > > Did you add any DNS resovler IP's to /etc/resolv.conf ? > > > -- > Kind Regards > Rudi Ahlers > SoftDux > > Website: http://www.SoftDux.com > Technical Blog: http://Blog.SoftDux.com > Office: 087 805 9573 > Cell: 082 554 7532 > Yes, I did but still internet unreachable.

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how to only allow tcp on dport 443 on the OUTPUT chain?
by erikmccaskey64 09 Mar '11

09 Mar '11

it's a normal desktop machines iptables firewall: If i want to block udp on dport 80 on the output chain, then is this enough? i want to only allow tcp on it! iptables -P OUTPUT DROP iptables -A OUTPUT -o $PUBIF --dport 80 -j ACCEPT or i need this rule? iptables -P OUTPUT DROP iptables -A OUTPUT -o $PUBIF -p tcp --dport 80 -j ACCEPT the second one is the good one?

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Re: [CentOS] Creating the symbolic links in the /boot and /boot/grub/
by Nico Kadel-Garcia 09 Mar '11

09 Mar '11

On Wed, Mar 9, 2011 at 12:40 AM, Todd Cary <todd(a)aristesoftware.com> wrote: > My current kernel is "vmlinuz-2.6.9-89.35.1" per grub.conf: > > #boot=/dev/hdc > default=1 > timeout=5 > splashimage=(hd0,0)/grub/splash.xpm.gz > hiddenmenu > title CentOS (2.6.9-100.EL) > root (hd0,0) > kernel /vmlinuz-2.6.9-100.EL ro root=/dev/VolGroup00/LogVol00 rhgb quiet > initrd /initrd-2.6.9-100.EL.img > title CentOS (2.6.9-89.35.1.ELsmp) > root (hd0,0) > kernel /vmlinuz-2.6.9-89.35.1.ELsmp ro root=/dev/VolGroup00/LogVol00 rhgb > quiet > initrd /initrd-2.6.9-89.35.1.ELsmp.img > > What is the correct syntax for "rpm -U -replacepkgs [kernel-whatever].rpm" ? > What should go into [kernel-whaetver]? > > In like manner, I have forgotten how to do a query on it to see if it is > present as in > > # rpm -q [kernel-name] > > Sorry, but it has been a long time since I used rpm and my Admin book does > not give an example. > > Todd OK, this should all go to the list for other CentOS folks who run into this kind of adventure. To get the full list of RPM's, look at the syntax of the "/etc/cron.daily/rpm"nightly script. > man rpm to look up the available options and learn about them. It's usually worth learning about such an important command, and RPM components are what yum really uses, so it's helpful to understand. > rpm -qa | grep kernel to get the list of kernel related components. Because of this line in your grub.conf: kernel /vmlinuz-2.6.9-100.EL I can also deduce that the relevant vmlinuz file was at /boot/bmlinuz-2.6.9-100.EL, and you can use the command "rpm -q -f /boot/vmlinuz-2.6.9-100.EL" to figure out what package it belonged to. > rpm -q -f /boot/vmlinuz-2.6.9-100.EL --qf '%{name}-%{version}-%{release}.%{arch}.rpm\n' will get you the get the full package name of the actual kernel RPM. Download the latest RPM from your favorite CentOS repository, after all, updating your kernel is you got into this trouble in the first place. > rpm -U --replacepkgs [whatever the name of that actual downloaded rpm is] See, you shouldn't *care* about your actual running kernel. You wanted the update, right? Go for it!!!! The running kernel will present problems you want the most recent one.

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