I'm using Cpanel on my server, before upgrade to new kernel, i could see 8 cores on my i7 server, now i only see 4 cores, is there anything that i need to do to have another time the 8 cores?
View 2 RepliesI have centos 5.3 workin on mini itx atom 330. i have some problem with the network when i use Samba. when i move big files the network goes down. i wanna to install the new kernel on my centos to try to fix the network problem with the new drivers includes on the new kernel.
View 2 Replies View RelatedI installed the Centos 5.5 with XEN and put 03 virtual machines (Centos 5.5 too). I did this correctly, but I have a problem. In the virtual machine, I need update the kernel. I used "yum update kernel" and this is downloaded correctly and the menu.lst file is updated too, but the kernel not ran. I ran "grub-install /dev/sda" or "grub-install /dev/xvda" and received a error return. I read the device.map file and i ran "grub-install /dev/sde" and received a error return too.
The errors:
[root@vm01 ~]# grub-install /dev/sda
/dev/sda: Not found or not a block device.
[root@vm01 ~]# grub-install /dev/sde
/dev/sda1 does not have any corresponding BIOS drive.
[root@vm01 ~]# grub-install /dev/xvda
/dev/xvda: Not found or not a block device.
I'm using openSUSE 11.2 in my desktop pc (mb asus m4a78-em), and is the second time I deal with this problem. The first time, I simply did a format, I installed fedora and then I reinstalled opensuse (because the usb neither is detect in the installation process, in opensuse).Now, I don't want to do that again.
I just did a clean install and then I updated all packages, among them was the kernel. (Note, I SUPOSE the kernel update is the problem, but quietly can be the kde update, I don't know).The problem itself is opensuse can't detect any usb device, among then are my wireless usb kit (mouse, keyboard). Currently I only have this input device (also a usb mouse, so I can't do anything in opensuse), but I think I will have borrow a ps2 keyboard, at least.The actual kernel is 2.6.31.12-0.2. In the grub, the usb works. When the first loading screen appears, all leds are turned off.I know it is little information, but it's this I can give for now. Let me know if I should give more.
I'm using Ubuntu 10.04 Lucid LTS. I have problem with my Ubuntu,Whenever I ran "sudo update-grub" command it did not detect my Ubuntu kernel nor Windows XP installation on another drive (I installed Ubuntu and Windows in different drive).It just display "Generating grub.cfg" and then "done". No "Found kernel..." message.
View 1 Replies View Relatedafter update to kernel-2.6.18-164.el5 one of the 2 NIC's of my machine are only found at 1 of 4 reboots. Using the old one kernel-2.6.18-128.7.1.el5 all is fine. This are the to NIC's:
00:0a.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)
00:0b.0 Ethernet controller: Intel Corporation 82557/8/9/0/1 Ethernet Pro 100 (rev 0c)
And the Intel one, makes the problems with the new kernel.
The server runs# uname -r2.6.18-128.4.1.el5However, today I executed yum update kernel*due to security advisory. I was just about to reboot the system when I realized that it runs VMWare Server Instance that will most likely fail to restart after kernel upgrade (I had a hard time fixing it after previous kernel update). Now I want to keep 2.6.18-128.4.1.el5 after reboot.I see that new kernel is scheduled for booting:
# cat /etc/grub.conf
default=0
timeout=20
[code]....
I am an old days RH release user(from 6.x) and just switching back from Debian/Ubuntu to CentOS on some servers, but I can not understand the kernel update strategy currently enabled in CentOS.There are two boxes, with almost identical installation, but recently there was an auto update of kernel on one box. This auto update also seems to issue an auto reboot on the machine, which is unacceptable on server machines.
View 2 Replies View RelatedOnly lately I notice that my CentOS 5.2
(Linux centos52-64-fuj 2.6.18-92.el5 #1 SMP Tue Jun 10 18:51:06 EDT 2008 x86_64 x86_64 x86_64 GNU/Linux)
does not detect a second core according to /proc/cpuinfo
Quote:
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 15
[Code]....
I applied the Kernel update that showed in the updater via the GUI.It now won't boot anymore.Memory for crash kernel (0x0 to 0x0) notwithin permissible range.WARNING calibrate_APIC_clock: the APIC timer calibration may be wrong.
View 2 Replies View RelatedI have just bought new PC (Intel mother board "Intel DP43TF ATX" and Processor "Intel Core 2 Quad Q9550"). and I have installed centos 5.3 32 bit.
NOTE: All cores are enabled in BIOS.
When I issue below command, it shows only one core (not 4 cores): what could be reason!
# cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 23
[Code].....
Is it possible to hide cpu cores from an application?
I am running RHEL 5.5 on a Sun 4450 with 24 cores. We use Sybase database. Licensing for Sybase is by core. I would like to restrict Sybase to using 8 of the 24 cores and allow other apps on the system to use the rest of the cores. I want to reserve 8 cores for Sybase use only and Sybase only has access to those 8 cores.
i'm currently running centos 5 with kernel version 2.6.18-92.1.22.el5 is there any way to update to kernel version >= 2.6.27 via yum ? if not via yum is it advisable to compile from source?
View 5 Replies View RelatedUpdate to 5.3 went OK a few days ago.Today there is updated kernel packages available but it fails dependencies on ecryptfs-utils.
View 3 Replies View RelatedI try to update my kernel to 2.6.18.128.4.1.el5 using
# yum update
After # yum update # rpm -qa kernel*|sort gives the following:
kernel-2.6.18-128.1.14.el5
kernel-2.6.18-128.1.16.el5.centos.plus
kernel-2.6.18-128.4.1.el5.centos.plus
kernel-2.6.18-92.1.18.el5
kernel-2.6.18-92.el5
kernel-devel-2.6.18-128.1.14.el5 .....
This my grub.conf:
# Note that you do not have to rerun grub after making changes to this file
# NOTICE: You have a /boot partition. This means that all kernel and initrd paths are relative to /boot/, eg.
# root (hd0,0)
# kernel /vmlinuz-version ro root=/dev/VolGroup00/LogVol00
# initrd /initrd-version.img
#boot=/dev/hda
default=1
timeout=5.....
yum update installed:
CentOS (2.6.18-128.4.1.el5.centos.plusxen) and
CentOS (2.6.18-128.4.1.el5.centos.plus)
both are not working. I have to run the system using: 2.6.18-128.1.14.el5. Upon trying again #yum update it says that no packages are marked for update. Can I manually install the desired kernel? Do you know a reason why yum update is not automatically installing the proper kernel?
I had a Centos 5.5 system working great...and then due to crazy curiosity, installed the kernel update. Did this through the graphical interface, uncheck all update other than kernel. It downloaded, installed fine..After reboot now all I get is GRUB_ and then nothing else! I waited 3-4 minutes and had to shut down system. Have been googling around but thought I will post it here as well..When I boot with Win7 and use Ext2fsd to check, the boot folder is empty. Not sure if this is because ext2fsd does not read boot folder or it got wiped out by the yum upgrade process.
View 9 Replies View RelatedI have recently run an update and now we are unable to boot the newer kernel. We get stuck as below;
Memory for crash kernel (0x0 to 0x0) notwithin permissible range
Red Hat nash version 5.1.19.6 starting
Unable to access resume device (/dev/VolGroup00/LogVol06)
[Code]...
The kernel version we were at was 2.6.18-194.el5 and the update move us to 2.6.18-194.17.1.el5. I've done some googleing but I'm unable to work out exactly what I need to do. I'm guessing the new kernal is missing a module?
identifying the number of cores each processor is running.
I have checked /proc/cpuinfo but i dont find any core details inside it and I can find only no of processor and its speed.
I am running CentOS 5.x and want to yum update, but I do not want to touch the kernel. How can I exclude the kernel update and prevent yum from removing my current kernel?
View 3 Replies View RelatedI have 2.6.18-164.2.1.e15 running on Hyper-v. I did yum update and noticed that kernel is upgraded to 2.6.18-164.9.1.e15. If I try to boot into the new kernel it hangs with message first "switchroot mount failed" and then "kernel panic". This is probably related to Hyper-v drivers installed in the old kernel. First question: Do you think this is correct? Is it possible to somehow disable Hyper-v drivers so I can boot into the new kernel and then reinstall drivers? There is nothing in Microsoft documentation about uninstalling Linux Integration Components.
View 9 Replies View RelatedI am currently working to get to a stable dual boot Win7/CentOS 5.5 configuration on a Dell Latitude E6510 with the Intel 82577LM chipset. I haven't gotten the Centrino N WiFI chipset working yet, but the Eth0 device was working just fine.However, yesterday I did a system update. I did not pay close attention, but I believe the update did mention networking, because I thought it might help me get my wireless going. Now, Eth0 fails with the message, "Determining IP information for eth0... failed; no link present. Check cable?" It does this at boot up and if we try reactivating it once the system is up. We have tried unstalling and re-installing the driver.The Window 7 boot sees the adapter and runs just fine. I was at a different site location yesterday when everything was working, but my co-workers and I can't help but think it might be related to the update yesterday, since everything worked prior to the update and Windoze 7 works fine with the adapter.
I have not been able to mount my NTFS harddrive on the CentOS side, despite installing fuse, and I don't have wireless, which makes it difficult to get access to new drivers. I also have a FAT32 partition that would be great to share between the boots for passing info, but I haven't found a way to mount a FAT32 partition in CentOS.
Last I upgraded one of our cent 5 boxes which is running kvm with a mix of centos and windows VMs.After the update performance just tanked on the XP guest, but the others (including other windows VMs) are just fine.I checked with our good friend google and didn't really get any help there.We're hoping to NOT have to rebuild the XP guest, so I thought I'd check in here first.
This is CentOS release 5.5 (Final) with kernel
2.6.18-194.32.1.el5 #1 SMP (64bit)
I built a home server (NAS/WWW/SSH/media server etc) and chose CentOS 5 as the OS (stability, easy of configuration).I was just about to start tuning the power consumption when I realised that the kernel CentOS uses is so "old" that it does not support the latest reduced power consumption enhancements that Linux has achieved in big strides in the recent past (we are probably still talking 6-12+ months ago e.g. tickless kernel)..
So my questions; 1) I know CentOS was maybe not meant for home servers (certainly its not its primary purpose), but if it is, any ideas of what kind of power consumption it takes (I know its relative) and if there are particular power consumptions that are worthwhile?
2) Do you recommend me compiling my own 2.6.21+ kernel from kernel.org or am I just likely to have compatibility issues (I really did not want to do that) or when is CentOS 5.4 supposed to have a newer 2.6.21+ version kernel?
Was it wrong of me in principle to choose CentOS for a home server when I am power conscious? (I don't have a low-power VIA processor either but a P4 so I am really just hoping to make do with software changes).
After update to 5.3 and reboot I got this error. googling for it I found that it is a known bug in kernel REHL 5.3 and there is also a patch for it [URL]. I am very new to linux, so how to apply, or just wait for a new kernel?
View 4 Replies View Relatedi have a centos 5.5 server, 300GB sas harddiscs.
but serval days ago, my server always show:
only read file system and top,ps,vi all command is not usefull and show error -input output
i search it on google, and read many pages
i found it has 2 reason most like
1.harddisks broken
2.2.6.18 kennel'bug
i bought a new hardiscs and change it on my server
selinux and psacct is disabled in this system (RHEL5.6 2.6.18-194.11.3.el5 SMP x86_64). After performing a yum update, the syslog is flooded with kernel audit messages (related to PAM), even though audit service is turned off. Is there a way to disable this verbosity?
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I've got a problem with my Ubuntu Server 11.04 amd64, I think the problem comes from GRUB 2. Here is my problem : I updated my server and I now have Linux 2.6.38-10-server (in addition to 2.6.38-8) and, when I try to boot on version "10", I think I have a Kernel Panic because the screen keeps black and there is no use of the HDD (I can ear it working with version "8"). I also looked at /boot/grub/grub.cfg and I didn't saw any diference between the lines for v10 and those for v8 (except for "8">"10" of course).
I tried with Recovery Mode too, with this result : Loading Linux 2.6.38-10-server... Loading initial ramdisk...
> No use of the HDD (I don't ear it), and it's "frozen", can't do anyting but reboot it by ACPI (nothing happend when hitting "Num Lock") Another question : can we have no submenus in Grub2?
I have been trying to install centos on my hp servers and when i get to partitions my hard drives the OS does not detect any harddrives. I have 4 scsi drives and i believe a intergrated smart array controller.
View 1 Replies View RelatedIs there a way to run CentOS 5.2 update system using the shell, avoiding the GUI (I want to do it remotely using SSH?
View 1 Replies View RelatedI am running yum update and it thinks 2.6.18-128.1.10.el5 is the latest kernel, even though its really 2.6.18-194.3.1.el5
Code:
[localdomain ~]# uname -a
Linux localdomain 2.6.18-128.1.10.el5 #1 SMP Thu May 7 10:39:21 EDT 2009 i686 i686 i386 GNU/Linux
[localdomain ~]# yum update kernel
[code]....