CentOS 5 Server :: Can't Install Debian Xen Guest With Virt-installer [Centos 5.3]?

May 3, 2009

I have tried to install debian 5.0 and 4.0 without any luck. I have both tried virt-manager and virt-install with both debian-501-i386-netinst.iso, and full dvd. I't always gives me the same error:Starting install.Could not find an installable distribution at '/xen/debian-501-i386-netinst.iso'


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CentOS 5 :: Create KVM Virtual Machine With 5.5 As A Guest - Virtualization - Virt-install Error

Jul 22, 2010

I have CentOS 5.5 and try to create KVM virtual machine with CentOS 5.5 as a guest. But when I exec command:
virt-install --connect qemu:///system --name test --ram 1024 --file=/var/lib/libvirt/images/test.img --file-size=10 --vnc --cdrom=/var/lib/libvirt/images/CentOS-5.5-x86_64-bin-DVD-1of2.iso --vncport=10000 --accelerate --os-type=linux --nonsparse --livecd --hvm

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CentOS 5 Server :: CentOS 5.5 Guest In VirtualBox / Less Memory Available Than Configured

Aug 27, 2010

I just ran into a weird problem with a CentOS 5.5 64-bit server running VirtualBox 3.2.8 (I would run Vmware Server 2.0.2 if not for the well known fact that Vmware doesn't care about its Server line anymore and it doesn't run on CentOS > 5.3 without major splits). I currently have two guests in that VirtualBox setup, a CentOS 5.5 64-bit and a Fedora 13 64-bit. The CentOS 5.5 guest shows less memory available than configured. If, for example, I give the virtual machine 512MB of memory the guest OS only recognizes 380MB. If I give it 768MB it only recognizes 637MB, and so on. I don't have that problem on the Fedora guest - 1024MB configured, 1024MB available.

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CentOS 5 :: Installation Of Guest CentOS 5.5 DomU On Centos 5.5 Xen Dom0?

Aug 4, 2010

Problems with xen 3.1.2 creating and installing domU CentOS 5.5 I am trying to do a virt-install --prompt --paravirt, and the install error out while trying to download install RPMs. I have googled for xen centos virt-install and various permutations. I have found similar howtos for 5.4 and 5.3, but they resulted in the same outcome. I did find several posts with similar issues, but no solution was posted.[URL]..

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CentOS 5 :: Run 5.5 Guest On Vmware Server 2.0

Jan 11, 2011

I have a new public mail server running under Vmware Server 2.0 installed on Windows Server 2008. I'm not satisfy about performance, virtual machine has got 3gb of ram and 2 virtual cpu. Physical machine has got one intel xeon cpu 2.4ghz quad core, 8 gb of ram and 3 hdd 500gb raid5. I already set this option: Fit all virtual machine memory into reserved host RAM. How can I increase performance? Are there any kernel build for virtual installation?

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CentOS 5 :: Install Guest Os On Host Os?

Dec 9, 2009

I don't want to use image file as disk, but would like to allocate a disk for guest os. say it's /sda6, then do I need install guest os on host os? or can I install while the system is booting and only import a guest os from that? Do I have to mount the disk?

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CentOS 5 :: Install Guest Os On Vps Remotely?

Jan 10, 2010

i just experimented with virtualbox to make a vps on my centos machine, now i have a question in mind, since this was my local machine so i was able to install the guest os using the CDrom but when i have a server in the datacenter, and i create a vps on it and i am thousands of KM from my server. how will i install the guest os on my VPS on my server in the datacenter.

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CentOS 5 Server :: Xen Guest Won't Boot After Update / Solution For This?

Dec 21, 2009

I'm experiencing some rather severe problems after updating my Centos 5.4 system (Virtual Xen guest). What happens is that when the system boots it complains about missing .so files which prevents about 50% of the services installed from running.
I'm suspecting that it has something to do with selinux for two reasons: 1. The first services to go down complains about the security context of some files, and 2. selinux was kinda the reason I decided to update in the first place as it was disabled when it shouldn't be (enabled in system-config-securitylevel, disabled when running sestatus).
The whole boot-sequence ends with alot of "INIT: Id 'X' respawning too fast: disabled for 5 minutes"-messages (including all runlevels) before it goes stale, and I can do nothing.
The server in question had undergone very little tinkering from my part, pretty much none at all, the only services installed after installation was apache, mysql and webmin.

CentOS 5.4 is installed on both the host and guest.
The guest runs on an lvm-partition.
I have two other vm's(also CentOS) running just fine, altough I'm a bit weary of updating them .

Attached are some screenshots of the boot-process.

I hope some one here can share some insight on this problem. It's making me pretty nervous seeing that our whole network is run by CentOS-installations (not that I'm certain that CentOS is the culprit).

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Server :: CentOS Installer -not- To Use LVM In A Kickstart?

Dec 14, 2010

Does anyone know of a way to tell the CentOS installer -not- to use LVM in a kickstart? We've been using a system that lets us define which particular drives to use during the installation as part of our deployment system. This does not work now that LVM is the 'default' in CentOS. I've looked over the options and I see how to FORCE particular LVM configurations, but I see no way to just turn it off.

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CentOS 5 :: Cannot Install Virtualbox Guest Additions

Feb 15, 2010

I have 2 Centos 5.4 builds...one is x64 and the other on aother box is 32 bit...Both are running in virtual machines with version 3.1.4 Virtualbox.

I have tried on both versions to install the guest additions and on each the terminal comes up briely and then does not install...No error messages.

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CentOS 5 Server :: Virtual Machines - Renaming Libvirt Guest?

Aug 29, 2010

I am new to virtual machines in general, and currently playing with the XEN-based VM in CentOS 5.5. Question: if neither virt-manager nor virsh (using "virsh edit <guest name>" and changing the name in the XML file) are designed to actually change a guest's name...then what is the recommended procedure for doing this?

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CentOS 5 :: Install An Icecast Server On Centos 5 VPS Hosted Through Phurix?

Jul 1, 2010

I've been trying for the past week to install an icecast server on my centos 5 VPS hosted through phurix.

I've tried compiling it, installing it from RPM. but im getting nowhere. Has anybody had any luck installing it, who wouldn't mind explaining how they went about it?

I've searched google for hours on end and all I can come up with is generic cent os 4 guides that just wont work. Im not the best when in comes to linux. I do a great job of copying and pasting to a shell prompt and can use ftp etc.

if this is any use.. heres the last output from my last attempt and compiling it...

[root@vps613 icecast-2.3.2]# ./configure --prefix=/usr/local/icecast
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... /bin/mkdir -p
checking for gawk... gawk
checking whether make sets $(MAKE)... no


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CentOS 5 :: Unable To Install Centos 5.5 X86_64 On Vmware Server 2.0.2?

Nov 6, 2010

I have an i5 Thinkpad running Windows 7 64-bit. VT is enabled in the BIOS. I have installed vmware server v 2.0.2 but am unable to install Centos 5.5 x86_64 as a guest OS. The steps that I followed are as follows:1. Created a new VM, specifying RHEL 5 64-bit as the intended guest OS (per vmware documentation - Centos is not available as a selection2. Downloaded all 8 iso files for Centos v5.5 64-bit3. Modified the CD/DVD drive to 'connect at power' and use an iso with the path pointing to the x86_64 iso 1 of 8When I power up the VM, the console window displays 'ISOLINUX 3.11 2005-09-02 Copyright (C) 1994-2005 H. Peter Anvin' and nothing else. The installation splash screen never appears. As a test, I downloaded the first of 7 iso files for the 32-bit version of Centos 5.5 and pointed the CD/DVD drive to that iso. In that case, the installation starts as expected. I would really like to get the 64-bit version installed and running.

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Server :: Custom CentOS 5 Install With Ks.cfg File And CentOS All In One

Jan 14, 2010

What i want to be able to do is create a custom kickstart for my centOS 5 server. I want to create a bootable cd that I can pop in my server and basically walk away for 45 minutes and I come back and its fully installed. All the directions I have read so far tell me that I have to create a seperate ks.cfg and then I need my original centos cd to get it booted. Then the cd will ask for where the ks.cfg file is and I have to type the location. I just want to pop the CD in and type in linux_clean or something and have it perform a custom install based on the information and specification in my ks.cfg. How can I go about doing this?

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CentOS 5 Server :: Install Xp Inside Centos Then At The Beginning?

Dec 31, 2009

somebody please tell me whether it would be all right to install xp inside CentOS using VMware or it's better to do vice versa if it is ok to install xp inside centos then at the beginning when i install centos should i allocate all hard disk to this OS and later give some to xp , or initially i should keep some space for xp and install centos in the rest ?

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Server :: Having A Query Regarding Top And Virtual Memory - VIRT Mem More Than Actual Available VIRT Memory

May 4, 2010

I have a query regarding top & virtual memory. When we run top it show VIRT (Virtual Mem), RES (Resident Mem) & SHR (Shared Memory). The total virtual memory of my machine is 4 GBs (2 GB RAM + 2 GB Swap), but still I am able to see a process showing 4000m virtual memory column. what it means, as its show VIRT Mem more than actual available VIRT memory

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CentOS 5 Server :: How To Install Openssh 5 On CentOS 5.5 From RPM

Jul 7, 2010

I would like to replace default OpenSSH version 4.3 with latest one (5.x). New version do support SFTP chroot, which is something I need.Of course, it can be compiled from source, but it is worst possible option for maintenance, since I do have few servers. Does someone provide RPMs or source RPMs at least ? If yes, what is repository/URL ?

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CentOS 5 :: Install PHP 5.3 On Our Centos 5.2 Server?

Sep 30, 2009

We are currently running centos 5.2 with PHP version 5.1.6.

But we need to have PHP 5.2 or better still PHP 5.3 on our server.

How can this be done? I did a yum update and it updated everything all right but not PHP.

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CentOS 5 :: No Sound In Kvm Guest?

May 1, 2010

I'm running CentOS 5.4 with kvm and 1 Ubuntu 9.10 guest. I haven't gotten any sound from the start. I've done quite a bit of research and troubleshooting but have taken this as far as I can at this point. To start there was no virtual sound card, but after enough digging I found the option in virt-manager that creates that, created a new guest with sound and copied the line from the xml config file to my existing guest. The line I added in virsh was <sound model='ac97'/> And the virtual sound card now shows up properly in the guest, but still no sound in the guest. Sound works fine in the host so no hardware issues.

Next I followed the instructions here: [URL].. making sure to check the volume controls and user permissions, still no sound. I read somewhere on the net that SElinux messes up the sound, so I disabled SElinux on the host for testing purposes, but no joy. I also tried using modprobe snd-pcm-oss on my host but that didn't return any output so I'm not sure if that did anything. In short I've been shooting the dark trying different things and if anyone has an idea I haven't tried yet, I'd like to hear it.

I also found this on the net: [URL]... But this seems to refer to slackware and I have no idea which config file they are even talking about. I don't think it applies to me but who knows?

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CentOS 5 :: Get Centos Usb Installer?

Aug 4, 2009

Could anyone point me to any centos usb installers (or how to create one). I've got a box with no optical drive. It can install from usb though.

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CentOS 5 :: Guest OS In XEN 5.4 Doesn't Work?

Jul 13, 2010

1) Installed Cent os 5.4 in my system (name it as "guest os").

2) Downloaded the full kernel source, and patched the vanilla kernel to export symbol table (2 line change) [URL] (Yes I know that kernel should not be touched, if touched you should not seek help here . but I felt I didnt do any big change in kernel there). Besides we unset the config_smp & config_preempt parameter to make the kernel as not SMP and not preemptive .

3) Then compiled and booted with the new kernel 2.6.18, everything went fine . Now my gust os box is loading fine and I dont have any issue .

So now I need to install this above machine as guest OS in one more XEN machine cent os 5.4 (name it as "xen os").

So we created the image out of the above box "guest os" and added it as VM in xen os . But while booting it always hangs under some error like "/usb device sort of thing" (I dont have the screen where it hangs, but I do have the equivalent xen log from XEN OS linked to [URL] .

1) what the error is, and what need to be changed in my guest os build .

2) In general I am new to this VM and XEN installation, to be frank I am completely zero . Does changing the native os 5.4 to guest os need any change in kernel or something.

3) Does this case possible, install plain cent os in xen machine. After then patch the kernel in VM and boot with that . I guess it should not be possible ...

4) If possible guide me to some documentation where I can learn few basics over this.

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CentOS 5 Networking :: Virtio-net In VirtualBox Guest

Jan 15, 2010

I am running a Centos 5 x86_64 guest with VirtualBox 3.1.2.The virtio modules are loaded, but the virtual interface is not detected.Anyone else use the new virtio network drivers with virtual box and know how to get this to work?

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CentOS 5 :: Settings Of Networking For Guest System (KVM)?

Aug 13, 2010

My problem is next: I have Public IP-addresses (ex. 80.237.x.x) and this IP-addresses join to network interfaces (eth0:0, ... eth0:5) and I have local IP-address of Guest System of NETWORK I can do here if I want assign Public IP-address for Guest System? Because if I want connect to my Guest System through any computer in world (ex. through SSH) I should have public IP of guest system (not private, ex.

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CentOS 5 :: Virtualbox - Guest Additions Replacements Better?

Apr 27, 2011

I use CentOS under VirtualBox. There are Guest Additions, but for Ubuntu are
virtualbox-ose-guest-utils and virtualbox-ose-guest-x11
There are GA replacements, better than GA (no problem with AppArmor). Are CentOS replacements ?

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CentOS 5 :: How To Modify The 5 Installer

Jul 18, 2009

After booting machine with CentOS 5. DVD, initrd.img will do some command to initialize everything to start installing CentOS. At this time, I need put some command so that I can enter some values and store them in a file. After finishing installation, Cent OS will read information from this file to do some tasks.I think I should modify initrd.img in Cent OS DVD but can not because this file is in binary (compiled file) .

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CentOS 5 :: KVM With Windows 2008 Guest - ACPI Conflict

Mar 12, 2009

Centos version: 2.6.18-92.el5
Processor:Intel Xeon L5420 Quad-Core
Guest OS:Windows Server 2008 Web

KVM is istalled using these instructions: [URL] When I run qemu-kvm to boot a VM off the Windows Install .iso with the -no-acpi parameter the VM displays the following:

Windows Boot Manager
Windows failed to start...
Status 0xc0000225
Info: Windows failed to load because the firmware (BIOS) is not ACPI compatible

Without the -no-acpi parameter, the Windows Server 2008 guest shows a blue screen with "stop: 0x000000A5" meaning "The ACPI Bios in this system is not fully compliant to the specification." [URL] 386/32bit and x86/64bit versions of CentOs both exhibit the problem. IT WORKS after I compiled and installed the latest versions of the Kernel ( and KVM (84) (Using these instructions: [URL] Following advice [URL] I really don't want to run a custom kernel. I compiled various KVM versions with the 2.6.18 kernel but still get the ACPI problem or compiler errors or "Hypervisor too old: KVM_CAP_USER_MEMORY extension not supported" How to get a Windows Server 2008 guest running in KVM on Centos?

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CentOS 5 :: Xen Vm 'POST' And Error Messages - Guest Not Running

Jul 31, 2009

I'm running xen as installed from the CentOS Virtualization Suite and I'm having some problems. One of my VMs powers off immediately after an error during 'POST'. Is there a way to stop it from immediately powering off so I can see the error? And there's also at least one error message that appears for a split second after the vm craps out, before the gui console reports 'Guest not running'.

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CentOS 5 Hardware :: Guest Operating System Is Not Supported?

Jul 29, 2010

I am having a problem running CentOS 5.4 in VMware which have appeared with the following error.

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CentOS 5 :: Optimizing File Transfer Between KVM Guest And Host.

Oct 16, 2010

On my bare metal server, I get about 130MB/s read from a software RAID 10 array, but when reading the same file from a VM via NFS over the VirtIO interface,I only get about 40MB/s.

Furthermore, the process for the VM uses >180% CPU on the host, and ~40%, and the 5 min average is ~1.5 on the host and guest. I have dual E5620's so I'm disappointed that the transfer is so slow, as I was expecting at least 90MB/s.

I'm new to being a sysadmin, so if anyone has some tips I can use to increase the transfer rate, and possibility reduce the CPU load as well I'd appreciate it. I'm assuming that 130MB/s is the max speed of two 7.2k HDDs, but if there's any way I can squeeze any more out that would be great too.

System specs:

2x Intel Xeon E5620s @ 2.40Ghz
8GB of RAM @ 1066Mhz
4x 1TB Western Digital Black HDDs in RAID10

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CentOS 5 :: CentoOS Xen Host Reboots When Guest Is Booting

Jan 5, 2011

I've found a workaround, but the workaround doesn't make any sense to me.I suspect I am running into a bug of some sort.I've tried to search for a solution, but the search terms are too broad and I can't seem to find anything useful.I have a CentOS 5.5 system that I've set up Virtualization on (presumably Xen, right?). I have a RHEL 5.4 Guest OS using "Full Virtualization" method.When I was installing the RHEL guest, the entire server rebooted just as the RHEL guest was booting for the first time.Thinking that odd, but coincidental, I just let the Host server reboot and then started up the RHEL Guest again.The reboot happened again and in the same spot! When I say the server rebooted, I mean black screen...pause...bios screen.I finally managed to get the RHEL Guest booted by removing the DVD that I had in the DVD drive and disconnecting it from the Guest OS in VMM. Very, very odd. I can reproduce this behavior by simply booting a Guest OS with a DVD in the drive (so far I've tried only RHEL guests).

The reboot happens at the same place in the Guest boot process. It's when RHEL starts the UDEV script. Actually, a few seconds after the RHEL system displays "Starting udev" message. I've looked in both the CentOS and RHEL messages log and found nothing.It's not a huge deal at this moment, but I will be sending these servers out into the field and I can't control what the end users of these systems put in the DVD drives.

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