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Re: [CentOS] [OT] Linux/CentOS Volunteer or PT Work
by techlists＠comcast.net 06 Dec '06

06 Dec '06

-------------- Original message ---------------------- From: "Nick Webb" <webbn(a)acm.org> > PG, > > > > > So did you end up getting your RHCE or did you decide it wasn't work > the trouble for the benefit? > > Nick No, I didn't get it yet, but it's still on my to-do list. I always get pulled into Windows related projects with my current employer because my professional experience is more Windows heavy. I would like to get on a project that involves Redhat, but can't see that happening unless I give them some kind of justification that I have some level of competence with Linux. Direct job related experience with Linux, of course, would be the best. But if you don't have that experience, and you can't get the opportunity to get it it because you don't have previous experience (the old catch-22), then a fairly well regarded cert is going to help justify giving you a chance. The cert on its own probably won't clinch anything for you, but the cert plus other real world experiences here and there might do the trick. PG

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[OT] Linux/CentOS Volunteer or PT Work
by Nick Webb 06 Dec '06

06 Dec '06

Hi All, I'm pretty new to this list and to CentOS, so forgive me if this kind of thing is shunned. I have really enjoyed following some threads on this list and learning what everyone out there is doing with the OS. I actually got started on CentOS when researching how to study for the RHCE without forking out big cash for Red Hat licenses, a donation is coming soon. Anyway, I'm looking to do some part time Linux work (I'll work cheap, possibly free for a non-profit) and would like some suggestions on how others on the list have found odd job work. My goal with this work is to get some resume building Linux experience, help me pass the RHCE exam, and ultimately begin doing contact work or move into a full-time Linux/Unix position. I have two years experience administering HP-UX and Sun Solaris for a University, about 8 years total IT experience, and I've used Linux at home since 1998 or so; I just need some "real-world" Linux experience. I feel confident I can accomplish just about any Linux project using my broad background of experience and learning a little along the way. The main problem I see is that I only have 10-15 hours per week to give this, as I have a full-time IT job as well, so flexibility on time of day/time of week of work is key. Thanks, Nick PS: Without starting a holy flame war, how do you all feel about the RHCE exam? Other preferred exams? I know exams mean very little in comparison to experience, but I feel without much "real world" experience on Linux it may be a good start at getting the first gig...

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/etc/sysconfig/i18n
by Denis Machard 06 Dec '06

06 Dec '06

hi, Which is the goal of the option SYSFONT="latarcyrheb-sun16" in file /etc/sysconfig/i18n ? Why use this font by default ( latarcyrheb-sun16) in centos, a particular reason? denis

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Strange issue with device-mapper lib in CentOS
by Alexey Loukianov 06 Dec '06

06 Dec '06

Hello all, a couple of weeks ago I've been installing CentOS 4.2 on a very-old server machine with MSI server board based on Intel GX440 chipset, two Xeons 500Mhz and one 1Gig of RAM. There is an AMI MegaRaid 467 installed as a storage controller, which causes some troubles with installation, as stock CenOS4 install and production kernels doesn't have older megaraid.ko module compiled, but there are a lot of not so very difficult ways to overcome it. After a clean-and-relatively-fast install first of all I had up2date-d it to CentOS 4.4, did some basic initial reconfigurations, turned it off and left it lay around doing nothing. Today its time has come, and I turned it on. While booting I've seen a message "Segmentation fault" just after a line about "Starting up LVM2". That's confused me a bit. Logged it as root, typed vgdisplay, got a normal output and a message "Segmentation fault" after it. lvdisplay performed just the same - normal display of all LVM logical volumes and a "Segmentation fault" at the bottom. Next step was obvious: # rpm -Va Huh, here we are. There's a bunch of RPMs with binary files in them changed since they've been installed. Just looks like it's a virus job I thinked. But, wait! That's very strange! This server has been laying around turned off and doing nothing since the moment I've done the installation of the system. There were NO possible time for a virus to infect a system. Well, in any case, I took on my special LiveCD with a ClamAV on it and a RamDisk for freshclam to store updated virus databases, booted it, mounted possibly infected system and checked it with clamscan. There were NO viruses found. Well, I though that this might be caused by a faulty SCSI disk in array, that distort the data that's being written to it, instead of informing host that there's a bad block here. Ok, that's easy to check. Let me go to the single mode, reinstall distorted RPMs using rpm -Uvh --replacepkgs, do a couple of 'sync's, remount all filesystems with -O ro,sync, and check installed rpm's with a rpm -Va. Headed on, done all above, got nothing. After a reinstall all files became correct, and LVM tools got back to a correct behavior without "Segmentation fault". Hmm... that's strange, I thought. Well, at least ATM I've got a correctly functioning system without viruses. Huh, well, now it's time to reboot and check how does it performs. I'm going to do unattended reboots in future, it should reboot seamlessly without excess questions. # shutdown -r now Reboot went smoothly, but just as LVM2 was initializing, I've got "Segmentation fault" message again! Damn! What's wrong?! Logged in, rpm -Va - gotcha! Again, device-mapper RPM was broken. Well, let's reinstall it again, sync, remount root readonly, check with rpm -V device-mapper. Done that - all seems to be ok, no output from the rpm -V = files are intact. Rebooted again. Run: [root@omega MegaMgr5.20]# rpm -V device-mapper ..5..... /lib/libdevmapper.so.1.02 That's it. After each and every reboot I've got this file corrupted. Looks like it's not a faulty HDD trouble, and it's not a faulty RAID controller. Most likely something corrupts this file during shutdown process or during boot process. Haven't got enough time today to investigate more deeply, going to continue with it tomorrow. Will post here the results, if any. -- Best regards, Alexey Loukianov mailto:aloukianov@lavtech.ru System Engineer, IT Department, Lavtech Corp

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recommends on CentOS + Via Epia CN10000EG
by Jed Reynolds 06 Dec '06

06 Dec '06

I'm considering building a network gateway using a Via EpiaCN10000EG motherboard like seen here: http://www.logicsupply.com/product_info.php/cPath/79/products_id/444 I've heard that this is a pretty recent mobo and drivers for it are in Ubuntu but that a 2.6.9.x CentOS kernel might have troubles with it. Anyone have any opinions on this mobo? Thanks jed

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dovecot disconnect(s)
by Michael Kress 05 Dec '06

05 Dec '06

Hi, I've got a problem with dovecot regarding a pop3 proxy issue. When I configure a dovecot server to do just plain pop3 I can telnet from a windows box without any flaw, but as soon as the client uses some pop3 proxy (for example outlook uses avira antivir Mail-AntiVirus Protection), queries to that server fail. A log line looks like this: pop3-login: Dec 05 22:53:24 Info: Disconnected [::ffff:84.165.54.42] Moreover with the proxy activated, a telnet to port 110 (pop3) is not working properly, the cursor stays right behind "+OK dovecot ready." and as soon as I enter a character, the server rejects this character as an unknown command. As soon as I turn off the Antivir-Proxy the telnet to port 110 runs flawlessly and I can login. Is there any fix for that? Or did I misunderstand something? TIA for any hint Regards, Michael -- Michael Kress, kress(a)hal.saar.de http://www.michael-kress.de / http://kress.net P E N G U I N S A R E C O O L

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RE: [CentOS] HOW TO SETUP VPN ON CENTOS
by Robert Becker Cope 05 Dec '06

05 Dec '06

John R Pierce <pierce(a)hogranch.com> wrote: > openVPN is by far the cleanest, easiest to setup and easiest to use > VPN I've seen to date. It can handle LAN to LAN tunnels, client to > LAN, client to host, all sorts of combinations, its quite easy to > setup the routing, etc etc. I can't agree with this more. Also, you can configure it to run with TCP over port 443, which makes it much more likely that a network you're connected to is going to allow the connection out. Other VPN solutions use a range of ports and other protocols that may not handled as well at hotels and such. Note that you can get OpenVPN RPMs here: http://dag.wieers.com/packages/openvpn/ robert

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RE: [CentOS] HOW TO SETUP VPN ON CENTOS
by Bowie Bailey 05 Dec '06

05 Dec '06

John R Pierce wrote: > > Do you have a lot of experience with this VPN solution? Is it rock > > solid reliable? > > > openVPN is by far the cleanest, easiest to setup and easiest to use > VPN I've seen to date. It can handle LAN to LAN tunnels, client to > LAN, client to host, all sorts of combinations, its quite easy to > setup the routing, etc etc. > > it uses a simple SSL socket as its transport, so its friendly with > 'NAT' firewall/routers. > > there's a GUI client for windows, you can give that to someone, and > give them a config file for it with prebuilt public keys, they > install the GUI client, then drop the conf file into the right > directory and they are online in seconds. As an additional bonus, the GUI install, config file, and key files will all fit on a floppy! Not that floppies get all that much use these days, but I always hate to burn a CD with only 1-2 MB of data... -- Bowie

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HOW TO SETUP VPN ON CENTOS
by Indunil Jayasooriya 05 Dec '06

05 Dec '06

Hi, I want to setup vpn on centos 4.4. How can I do it ? What is the suitable pkg for it. I have only 2 requiremts. 1 st requirement is I want to setup a VPN SERVER on centos 4.4 on my end. It should talk to the other end. (The other end is also Centos 4.4) - pls note that I will have to set up both VPN servers. 2 nd requirement is setting up a vpn clinet (this may be Linux or windows)- wherever these clients (usually laptops) go, These clients should be able to go via VPN Server on my end. help needed? -- Thank you Indunil Jayasooriya

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Re: [CentOS] CentOS 4 and Intel D965 motherboards
by David Thompson 05 Dec '06

05 Dec '06

Aleksandar Milivojevic wrote: > >If it's not too late, return the motherboard, get something else. > >My personal experience with Intel's desktop motherboards is that they >work most of the time for most of the people. Which is not enough for >me. If you browse the list's archives, you'll find that particular >models of Intel motherboards worked fine for many people on the list. >However, that can't be said for the whole line of Intel's motherboards >in general. I currently have one Intel motherboard on my desk that >works just fine with CentOS 4.4 (D845GNT). There is couple of BIOS bugs >when selecting boot device, but with some trial and error I got it to >boot from CD-ROM so I could install OS onto it. Some time ago I also >had another Intel's motherboard (D865PERL) that worked extremely >unstable depending on combination of additional PCI cards (it >particularly didn't like PCI cards made by Intel). Thanks for the input. We have several hundred Intel motherboards in various deployments, of many different Intel northbridge generations: 815, 845, 865, 915, and 945. For the most part, they've worked very well for us. Our vendor is starting to push us to migrate to the 965-based generation; thus our current evaluation (and question(s)). Cheers, Dave

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