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Centos 5.5 - php53 and mhash
by For＠ll 24 Nov '10

24 Nov '10

Hi, I'm using repo from http://dl.iuscommunity.org/ and I want use php5.3 but I can't see module php53-mhash, where I find this module? Any repo can I use where this module I find? For@ll

4 3

CentOS 5.5: what do /etc/sysconfig/networking and /etc/sysconfig/network-scripts exactly ?
by giggzounet 24 Nov '10

24 Nov '10

Hi, on our cluster we have 5 network interfaces. I was surprised to discover that the ifcfd-* files under /etc/sysconfig/networking and /etc/sysconfig/network-scripts were not the same. So I have searched a little bit, but I'm now confused: - the files under /etc/sysconfig/networking come from system-config-network. - the files under /etc/sysconfig/network-scripts are read by the /etc/init.d/network script and used to set up the network interfaces. - I don't find where the files under /etc/sysconfig/networking are used. - Does system-config-network modify the file under /etc/sysconfig/network-scripts too ? Is there someone who can enlightenment me ? Thx in advance, Best regards, Guillaume

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DNS update system-config-network GUI
by Lanny Marcus 24 Nov '10

24 Nov '10

Box is fully updated CentOS 5.5 (32 bit). DHCP is from the ADSL modem 192.168.1.1. After I update the DNS settings and restart the network, the DNS changes do not hold. I have tried using this GUI, as a regular user, after giving the root password, and, also, logged in as the root user. When I begin, the Primary DNS is shown as 192.168.1.1 the IP of the ADSL modem. I move that IP to the Tertiary DNS and insert the Primary and Secondary DNS IP's I want to use. Then, I save the file, quit, and restart the network (service network restart). I see messages that the file has been saved and suggesting that I restart the network or the box. The DNS I want to use is that of OpenDNS.com and I saw it work, briefly.Then,it stops working and when I launch the system-config-network GUI again, I see it has reverted to the original configuration, with only the Primary DNS of 192.168.1.1 (the ADSL modem) shown. Questions: The "DNS Search Path" is blank. Is there something I should insert there? If it appears that I am using the system-config-network GUI properly, what configuration file can I modify, to make these DNS changes hold permanently? TIA! Lanny http://www.magazines-magazine.com/

4 5

slow network throughput, how to improve?
by Rudi Ahlers 24 Nov '10

24 Nov '10

would like some input on this one please. Two CentOS 5.5 XEN servers, with 1GB NIC's, connected to a 1GB switch transfer files to each other at about 30MB/s between each other. Both servers have the following setup: CentOS 5.5 x64 XEN 1GB NIC's 7200rpm SATA HDD's The hardware configuration can't change, I need to use these servers as they are. They are both used in production with a few xen domU's virtual machines running on them. I want to connect them both to a SAN, with gigabit connectivity and would like to know how I can increase network performance a bit, as is. The upstream datacentre only supplies 100MB network connection, so in the internet side of it isn't much of a problem. If I do manage to reach 100MB that will be my limit in any case. root@zaxen02.securehosting.co.za:/vm/xen/template/centos-5-x64-cpanel root@zaxen02.securehosting.co.za:/ root(a)zaxen02.securehosting.co.za's password: centos-5-x64-cpanel.tar.gz 100% 1163MB 29.1MB/s 00:40 iperf indicates that the network throughput is about 930MB though: root@zaxen01:[~]$ iperf -s ------------------------------------------------------------ Server listening on TCP port 5001 TCP window size: 85.3 KByte (default) ------------------------------------------------------------ [ 4] local 196.34.x.x port 5001 connected with 196.34.x.x port 45453 [ ID] Interval Transfer Bandwidth [ 4] 0.0-10.0 sec 1.09 GBytes 935 Mbits/sec root@zaxen02:[~]$ iperf -c zaxen01 ------------------------------------------------------------ Client connecting to zaxen01, TCP port 5001 TCP window size: 16.0 KByte (default) ------------------------------------------------------------ [ 3] local 196.34.x.x port 45453 connected with 196.34.x.x port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0-10.0 sec 1.09 GBytes 936 Mbits/sec Is iperf really that accurate, or reliable in this instance, since the packet size is so small that it probably goes straight to memory, instead of HDD? But at the same time, changing the packet size to 10MB, 100MB and 1000MB respectively doesn't seem to degrade performance much either: root@zaxen02:[~]$ iperf -w 10M -c zaxen01 ------------------------------------------------------------ Client connecting to zaxen01, TCP port 5001 TCP window size: 256 KByte (WARNING: requested 10.0 MByte) ------------------------------------------------------------ [ 3] local 196.34.x.x port 36756 connected with 196.34.x.x port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0-10.0 sec 1.07 GBytes 921 Mbits/sec root@zaxen02:[~]$ iperf -w 100M -c zaxen01 ------------------------------------------------------------ Client connecting to zaxen01, TCP port 5001 TCP window size: 256 KByte (WARNING: requested 100 MByte) ------------------------------------------------------------ [ 3] local 196.34.x.x port 36757 connected with 196.34.x.x9 port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0-10.0 sec 1.08 GBytes 927 Mbits/sec root@zaxen02:[~]$ iperf -w 1000M -c zaxen01 ------------------------------------------------------------ Client connecting to zaxen01, TCP port 5001 TCP window size: 256 KByte (WARNING: requested 1000 MByte) ------------------------------------------------------------ [ 3] local 196.34.x.x port 36758 connected with 196.34.x.x port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0-10.0 sec 1.04 GBytes 895 Mbits/sec -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532

3 4

Router for SOHO network - hardware considerations
by Niki Kovacs 24 Nov '10

24 Nov '10

Hi, Last week I finished installing a small network in a private school : one server (an old IBM X225), seventeen desktops (Fujitsu Siemens PIV 2.4 GHZ, 512 MB RAM, 40 GB HD), all running CentOS 5.5. One extra machine is acting as a router, in that it is installed between the DSL modem and the network, with two Ethernet cards, and it's taking care of DHCP, DNS, NTP and also acts like a proxy (with Squid). It seems quite big and noisy and electricity-consuming to me, so I wonder if there is any small device that could possibly do the job as good, but which would me more adapted : small, solid and cheap (if possible). I imagine some tiny box just with a CPU and a small harddisk, a little RAM and two network interfaces (one out, one in), where I could install a very stripped-down CentOS, and then just forget about it. So far, I've googled a bit, and I've found two things: 1) Pyramid Soekris boards, where I can put something like Pyramid Linux on it. And 2) The Linksys WRT54GL, for which there are Linux firmwares like OpenWRT and DD-WRT. Is there anything you could especially recommend for this job? (I'm not afraid of getting my hands dirty, BTW :oD) Cheers, Niki

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Boot failure after install on IBM x3550 M3
by Toralf Lund 24 Nov '10

24 Nov '10

I'm trying to install CentOS 5.5 on a couple of servers of type IBM System x3550 M3, but it's not going too well. Actually, the install setup phase runs as expected, and the actual installation also appears to be successful, but the system will not boot - I just get a message (presumably) from BIOS saying that boot from hard disk 0. If I start the installer again after this, or boot rescue mode off the install DVD, the installation is correctly found, however. Does anyone have any idea what may cause this and/or how I can fix the problem? Or is there at least anyone out there who has tried CentOS on the same type of hardware? Note that I've tried (re)installing several times, and also tested CentOS 5.4, but the result is always the same. I've also used CentOS without any problems on an x3550 M2, i.e. a slightly older variant of the hardware. I've (so far) installed with the default disk layout and package selection. - Toralf This e-mail, including any attachments and response string, may contain proprietary information which is confidential and may be legally privileged. It is for the intended recipient only. If you are not the intended recipient or transmission error has misdirected this e-mail, please notify the author by return e-mail and delete this message and any attachment immediately. If you are not the intended recipient you must not use, disclose, distribute, forward, copy, print or rely on this e-mail in any way except as permitted by the author.

6 15

DisplayPort output with intel graphics driver?
by Toralf Lund 24 Nov '10

24 Nov '10

Hi. We've installed CentOS 5.5 on a "mini PC" with an onboard Intel graphics chip, which has both "VGA" and DisplayPort output. This works reasonably well, except that I'd like to connect the monitor to the DisplayPort, and I only seem to get a signal on the VGA connector. This is the case even if I boot with the DisplayPort (only) connected, in which case console output during boot goes to the DisplayPort, but the graphical output does not. On the other hand, . DisplayPort display did work when booting from a "live" Ubuntu CD. Is there anything I can do to get the correct display setup? Note that the driver used is "intel", not "i810". Thanks, - Toralf This e-mail, including any attachments and response string, may contain proprietary information which is confidential and may be legally privileged. It is for the intended recipient only. If you are not the intended recipient or transmission error has misdirected this e-mail, please notify the author by return e-mail and delete this message and any attachment immediately. If you are not the intended recipient you must not use, disclose, distribute, forward, copy, print or rely on this e-mail in any way except as permitted by the author.

1 0

nspluginwrapper rpms on x86_64? (was: firefox. java. 64 bit. bleah!)
by Mike Fedyk 24 Nov '10

24 Nov '10

On Sat, Nov 20, 2010 at 3:25 PM, Lars Hecking <lhecking(a)users.sourceforge.net> wrote: > Possibly. Or possibly not. On a closely related topic, can you comment on > whether or not it's a good idea to install the nspluginwrapper rpms on x86_64? > They seem to be fundamentally broken. > I don't think you need it anymore with FF 3.6.

4 3

10gig NIC - Link Delay
by Tom Brown 23 Nov '10

23 Nov '10

Hi I am having real trouble with a new batch of Intel NIC's - We were using another type of 10gig card and they were fine but got EOL'd from Intel and are now using something subtly different. I dont have all the details yet on the issue but basically there is a major delay in when the link comes up and this is causing major issues with PXE amongst other things. The log states this Nov 23 23:18:53 xxx kernel: ADDRCONF(NETDEV_UP): eth0: link is not ready Nov 23 23:19:09 xxx kernel: ixgbe: eth0 NIC Link is Up 10 Gbps, Flow Control: RX/TX Nov 23 23:19:09 xxx kernel: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready So 16 seconds for the link to come up - The only real difference between the old card and the new is that the new seems to support FCOE whereas the older one didnt Has anyone got any clues as to what causes link delays? thanks

3 3

Centos 6 installation memory requirements
by Robert Moskowitz 23 Nov '10

23 Nov '10

Will (does) Centos 6 require 512Mb of memory for the GUI install like FC14 or the lower requirement of FC13? My ASUS EE 700 has ~490Mb of memory (vidoe steals some from the 512Mb base) and FC14 switches to text install and does not install any GUI, leaving the boot in test mode. I recall a message earlier that 6 is based off of 14, but not the final Anaconda, thus my question. It would be NICE if the install can work with at least 384Mb of memory, as this is the recommended minimum for FC14 so I would think it is the miniumum for RHEL/Centos 6. I am seeing FC leave more older hardware behind and with its short cycles and 'currentness' of apps for RHEL 6, I am looking at moving some of my desktops back from FC to Centos. FC13 may be the last FC for some of them...

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