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yum hangs when installing uucp
by Dave 14 Nov '07

14 Nov '07

Hello, I've got a CentOS 5 box. I want to install the uucp rpm to give access to the cu command. I do a yum -y install uucp and yum is hanging on the transaction test. I get the file downloaded fine, but on transaction test yum freezes and i have to kill it's pid to stop it. Any ideas? I'm looking for a program for serial terminals. Thanks. Dave.

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Re: [CentOS] configuring sendmails domain
by Ross S. W. Walker 14 Nov '07

14 Nov '07

Look at submit.mc for email sent from localhost. -Ross -----Original Message----- From: centos-bounces(a)centos.org <centos-bounces(a)centos.org> To: centos(a)centos.org <centos(a)centos.org> Sent: Tue Nov 13 21:31:28 2007 Subject: [CentOS] configuring sendmails domain > > ----- Original Message ----- > From: "Jerry Geis" <geisj at pagestation.com <http://lists.centos.org/mailman/listinfo/centos>> > To: "CentOS ML" <centos at centos.org <http://lists.centos.org/mailman/listinfo/centos>> > Sent: Wednesday, November 14, 2007 12:11:02 PM (GMT+1000) Australia/Brisbane > Subject: [CentOS] configuring sendmails domain > > I tried editing sendmail.cf and changing the Dj line to X.com > so any email originating from my machine would be X.com not m.X.com > where m is machine name. > > I typed make in the /etc/mail directory and did service sendmail restart. > > This did not work. email still shows as m.X.com > > What am I missing so as to NOT have the machine name in the email address. > I just want the domain. > > Thanks, > > Jerry > _______________________________________________ > CentOS mailing list > CentOS at centos.org <http://lists.centos.org/mailman/listinfo/centos> > http://lists.centos.org/mailman/listinfo/centos > > -- > This message has been scanned for viruses and > dangerous content by MailScanner, and is > believed to be clean. > > > > > Editing the .cf file is not the way to do this sort of thing. Ensure you have the sendmail-cf package installed and make your changes to the /etc/mail/sendmail.mc file and then type 'make' to build the new .cf. Then restart sendmail. > > > Incidentally, the .mc file has the necessary parameters in it that you may be looking for; > > > dnl MASQUERADE_AS(`mydomain.com')dnl > dnl # > dnl # masquerade not just the headers, but the envelope as well > dnl # > dnl FEATURE(masquerade_envelope)dnl > dnl # > dnl # masquerade not just @mydomainalias.com, but @*.mydomainalias.com as well > dnl # > dnl FEATURE(masquerade_entire_domain)dnl > dnl # > dnl MASQUERADE_DOMAIN(localhost)dnl > dnl MASQUERADE_DOMAIN(localhost.localdomain)dnl > dnl MASQUERADE_DOMAIN(mydomainalias.com)dnl > dnl MASQUERADE_DOMAIN(mydomain.lan)dnl > > > I changed all the above to my X.com domain removed the dnl's on the line did a make in the /etc/mail directory, did service sendmail restart and I still get m.X.com and not just X.com What am I still missing something? Thanks, Jerry _______________________________________________ CentOS mailing list CentOS(a)centos.org http://lists.centos.org/mailman/listinfo/centos ______________________________________________________________________ This e-mail, and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution or copying of this e-mail, and any attachments thereto, is strictly prohibited. If you have received this e-mail in error, please immediately notify the sender and permanently delete the original and any copy or printout thereof.

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Need advice on storage
by boisvert.guy＠videotron.ca 14 Nov '07

14 Nov '07

Hi all, I have a CentOS 4.5 server running on a workstation mainboard (PCI Slots only). We have now one 200 Gigs IDE disk dedicated for e-mail server storage. We use Communigate Pro and the server has 45 Outlook clients with the MAPI connector (All mailboxes on the server). When a user opens Outlook, a refresh of the local cache is performed for his data. There is a big "Public" area (about 50 Gigs) where all the projects data/infos are stored (all that on the same IDE hard disk). Clients cache updates are performed on e-mail folder access. We noticed server response slowdown as the number of user increased (quite normal!). Now we want to upgrade the server to get better performance. I'd like to know if, as a temporary cheap upgrade, software RAID with a Sil 3124 and 2 x Raptor WD740ADFD (74 Gigs with NCQ) in Software RAID 0 would bring a significant performance boost. If it is the case, that would permit to phase out this server in 1-2 years and we'd upgrade the whole server after.Here a the specs of the actual "server":Asus A7V600 (I know, that's bad but it just works!!!)Athlon 2500+1 Gig RAM (we'll probably put 1 more gig soon if it can help)System Hard Disk: WD 80 GigsMail hard disk: Western Digital WD2000JB (IDE 200 Gigs) EXT3 on LVMBackups hard disk: 1 x 200 Gigs IDE, 1 x 320 Gigs SATA, 1 x 750 Gigs SATA --> LVM Total of 1270 GigsAny help / experience would be appreciated.TIA,Guy Boisvert

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Re: [CentOS] Need advice on storage
by Ross S. W. Walker 14 Nov '07

14 Nov '07

If you are seeing iowaits that high then something needs to be done. You CAN gain performance by striping, but the downtime due to disk failure can make your decision making skills look flawed. For a mail server I highly recommend RAID10 and drives with high RPM so you get better random io performance as 99% of io on a mail home server will be random io and while regular SATA drives would be ok for a file server which is mostly sequential they will stack up io waits on a busy mail or database server. The raptors are costly because they run at 10k rpm and have low seek times, this gives them much better random io performance, but sequential io is the same with regular SATA drives. In fact sequential io performance is almost identical between 7200rpm SATA and 15000rpm SAS the real difference is in random io where the 15k drives are 2x faster (1.2MB of 4k random ios a second versus 640KB of 4k random ios a second, unbuffered). If you have an external enclosure then that will help, but make sure the array is compatible with the drives you want. SATA disks cannot go into a SCSI array, though some SAS enclosures and controllers allow you to mix SAS and SATA drives (LSI is one). Performance can trump size here so if the choice is between 200GB 7200 rpm SATA drives or 72GB 15000rpm SAS drives, if your data fits onto the 72GB drives (probably 140GB if in a 4 drive RAID10) go with the 72GB drives (taking growth into consideration too). Hardware RAID can help too if you utilize onboard battery backed up write-back cache. The more write-back cache the better, just make sure it is battery backed up (BBU). -Ross -----Original Message----- From: centos-bounces(a)centos.org <centos-bounces(a)centos.org> To: CentOS mailing list <centos(a)centos.org> Sent: Tue Nov 13 01:58:27 2007 Subject: Re: [CentOS] Need advice on storage ----- Message d'origine ----- De: Kenneth Price <kprice(a)nowyouknow.net> Date: Lundi, Novembre 12, 2007 10:58 pm Objet: Re: [CentOS] Need advice on storage À: CentOS mailing list <centos(a)centos.org> > > You've already received a few responses about reconfiguring your > entireserver, so I'll avoid that route and simply answer your > question straight. > > "No" > > There will not be a "significant" performance boost striping > only 2 drives. > The 10K RPM Raptors alone will definitely increase performance, > but there > is little/no real advantage striping them together. Getting any > significant performance increase from a RAID array really > requires at > *least* 4 drives ... the more the merrier ... although I'll > probably catch > some flack from that statement. :-) > > A previous poster mentioned increasing your RAM from 1Gb to 2Gb. > That was > an excellent idea and should be done in parallel with whatever drive > changes you make. > > Regards, > Ken > > Thanks Ken. That's a good thing to know that software striping won't really boost performance, i then won't waste money on that avenue. I cannot explain why as i don't know about Linux drivers architecture and general system low level behavior but maybe somebody on this list could give us a clue. As i said on my previous post, i found that the server is inside a rack that has a VTRAK 15100 SCSI to SATA Enclosure with a free SCSI bus (the unit has 2 independant bus) and hard disk slots. I think we have a spare Adaptec 39160 so if it's the case, i could go with this solution and buy 4 x WD 250 Gigs "YS" (RAID) serie drives @ about 75$ each and put all this in RAID 10. The unit supports NCQ. It remains to be seen how well it can perform even if they are talking about "up to 200 MBps". Regards, Guy Boisvert ______________________________________________________________________ This e-mail, and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution or copying of this e-mail, and any attachments thereto, is strictly prohibited. If you have received this e-mail in error, please immediately notify the sender and permanently delete the original and any copy or printout thereof.

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CentOS-announce Digest, Vol 33, Issue 10
by centos-announce-request＠centos.org 14 Nov '07

14 Nov '07

Send CentOS-announce mailing list submissions to centos-announce(a)centos.org To subscribe or unsubscribe via the World Wide Web, visit http://lists.centos.org/mailman/listinfo/centos-announce or, via email, send a message with subject or body 'help' to centos-announce-request(a)centos.org You can reach the person managing the list at centos-announce-owner(a)centos.org When replying, please edit your Subject line so it is more specific than "Re: Contents of CentOS-announce digest..." Today's Topics: 1. CESA-2007:0961 Moderate CentOS 4 ia64 ruby - security update (Pasi Pirhonen) 2. CESA-2007:0961 Moderate CentOS 4 s390(x) ruby - security update (Pasi Pirhonen) 3. CESA-2007:0961 Moderate CentOS 4 i386 ruby - security update (Johnny Hughes) 4. CESA-2007:0961 Moderate CentOS 4 x86_64 ruby - security update (Johnny Hughes) ---------------------------------------------------------------------- Message: 1 Date: Tue, 13 Nov 2007 15:51:34 +0200 From: Pasi Pirhonen <upi(a)centos.fi> Subject: [CentOS-announce] CESA-2007:0961 Moderate CentOS 4 ia64 ruby - security update To: centos-announce(a)centos.org Message-ID: <20071113135134.GZ18540(a)centos.fi> Content-Type: text/plain; charset="us-ascii" CentOS Errata and Security Advisory 2007:0961 https://rhn.redhat.com/errata/RHSA-2007-0961.html The following updated files have been uploaded and are currently syncing to the mirrors: ia64: updates/ia64/RPMS/irb-1.8.1-7.EL4.8.1.ia64.rpm updates/ia64/RPMS/ruby-1.8.1-7.EL4.8.1.ia64.rpm updates/ia64/RPMS/ruby-devel-1.8.1-7.EL4.8.1.ia64.rpm updates/ia64/RPMS/ruby-docs-1.8.1-7.EL4.8.1.ia64.rpm updates/ia64/RPMS/ruby-libs-1.8.1-7.EL4.8.1.ia64.rpm updates/ia64/RPMS/ruby-mode-1.8.1-7.EL4.8.1.ia64.rpm updates/ia64/RPMS/ruby-tcltk-1.8.1-7.EL4.8.1.ia64.rpm -- Pasi Pirhonen - upi(a)iki.fi - http://pasi.pirhonen.eu/ Top-postings silently ignored

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printing problem
by umair shakil 14 Nov '07

14 Nov '07

Salam, I am using CentOs 4.4, i have network printer with ip 192.168.1.88. when i click the option to print document, it seems everything is OK, printer shows with bliking of Data light but no print..... what i am missing??? Regards, Umair Shakil ETD

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freenx
by Michael Oevermann 14 Nov '07

14 Nov '07

Hello, I am having problems getting freenx running in CentOS 4.5 i386_64. I know this is not a new problem, however, I havn't found a solution in all the postings I found on the web. I did exactly what is supposed to work and described in detail at http://wiki.centos.org/HowTos/FreeNX After doing that I can connect to the server with nxcleint without problem but I get only a black screen. In the files .nx/S.../session and errors I see the warning Warning: Unrecognized session type 'unix-gnome'. Assuming agent session. The same happens with KDE. With the command nxloadconfig --check I get the output Warning: Could not find nxdesktop in /usr/bin. RDP sessions won't work. Warning: Could not find nxviewer in /usr/bin. VNC sessions won't work. Warning: Invalid value "APPLICATION_LIBRARY_PRELOAD=/usr/lib/ libX11.so.6.2:/usr/lib/libXext.so.6.4:/usr/lib/libXcomp.so.2:/usr/lib/ libXcompext.so:/usr/lib/libXrender.so.1.2". /usr/lib/libX11.so.6.2 could not be found. Users will not be able to run a single application in non-rootless mode. Warning: Invalid value "COMMAND_FOOMATIC=/usr/lib/cups/driver/ foomatic-ppdfile" Users will not be able to use foomatic. Warning: "/usr/lib/cups/backend/nxipp" is not executable. Users will not be able to enable printing. Warning: "/usr/lib/cups/backend/smb" is not executable. Users will not be able to enable printing. Warning: Invalid value "COMMAND_START_CDE=cdwm" Users will not be able to request a CDE session. Warning: Invalid cupsd version of "/usr/sbin/cupsd". Need version 1.2. Users will not be able to enable printing. Error: Could not find 1.5.0 or 2.[01].0 or 3.0.0 version string in nxagent. NX 1.5.0 or 2.[01].0 or 3.0.0 backend is needed for this version of FreeNX. Errors occured during config check. Please correct the configuration file. The libraries are definitely not where nx looks for them - they are located at /usr/lib64/NX/lib (and symlinks under (usr/lib/NX/lib). What is going wrong here? I also tried to use nxconfig with --setup- nomachine-key with the same results, except that I did not need to import the key in the nxclient anymore. Does anyone has an idea to solve the problem? Many thanks for help Michael

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configuring sendmails domain
by Jerry Geis 14 Nov '07

14 Nov '07

I tried editing sendmail.cf and changing the Dj line to X.com so any email originating from my machine would be X.com not m.X.com where m is machine name. I typed make in the /etc/mail directory and did service sendmail restart. This did not work. email still shows as m.X.com What am I missing so as to NOT have the machine name in the email address. I just want the domain. Thanks, Jerry

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Sso the Linux way?
by Jason Pyeron 14 Nov '07

14 Nov '07

So I was googling around about this over the last week and here is what I found: nis/yp is for some reason bad. Kerbos is holy, but no how-to's that don't involve windows and active directory. What is the recommended sso approach for centos? Where are there examples / docs to follow? Jason -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- - - - Jason Pyeron PD Inc. http://www.pdinc.us - - Sr. Consultant 10 West 24th Street #100 - - +1 (443) 269-1555 x333 Baltimore, Maryland 21218 - - - -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- This message is for the designated recipient only and may contain privileged, proprietary, or otherwise private information. If you have received it in error, purge the message from your system and notify the sender immediately. Any other use of the email by you is prohibited.

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Centos5 install failure
by John Thompson 14 Nov '07

14 Nov '07

A couple weeks ago I attempted to install Centos5 to replace an increasingly decripit Fedora Core 1 installation. Centos went onto an 80GB piece of previously unallocated space on /dev/hda, using the default configuration offered by anaconda. The installation process went smoothly, however, I was unable to boot Centos when it completed due to "Grub failure." IOW, I never even got the boot loader to come up. I've never been a big fan of grub (I've always used lilo) and this hasn't impressed me. I was able to restore Fedora's lilo loader but I cannot persuade lilo to boot Centos, probably because the / filesystem is using LVM which I am not familiar with. It failed with a kernel panic trying to find things in /dev. I put it on the back shelf for a couple weeks and finally got back to it today. I wiped hda to give it a fresh base on which to install, and it installed fine once again -- no errors. But on reboot grub failed once again, getting as far as GRUB and then locking up, responding only to the RESET button. So I created a bootable grub CD and booted from that, fed it the Centos kernel and initrd and booted. Lots of "missing module" errors because (as it turns out) the Centos installer neglected to create the proper module tree in /lib/modules. But there was one for the xen kernel. WTF, I'll try that. Boot again and tried to tell grub to load the xen kernel: "invalid file format." Whatever. Booted the regular kernel and initrd again, gritting my teeth through all the errors and created a sym-link from the xen module tree to what should be the regular module tree. Rebooted again with the regular kernel and initrd. Fewer error messages this time, but still a fair number. I just wanted to get to the point were I could repair the missing modules. So the system comes up -- sort of. The modules that still couldn't load turned out to include those for my network card, so no network access. Nor could I mount any cds or the xfs file system on the raid array. Useless. Just frickin' useless. My low opinion of grub remains unchanged, and my opinion of Centos is following in the same direction. I spent the rest of the afternoon restoring Fedora off my backup tapes. Any clues what I did wrong? -- John (john(a)os2.dhs.org)

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