Frequently Asked Questions About Linux / UNIX » Virtualization http://www.cyberciti.biz/faq Every answer asks a more beautiful question. Fri, 03 Feb 2012 22:38:32 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 FreeBSD Install VMWare Guest Toolshttp://www.cyberciti.biz/faq/freebsd-install-vmware-freebsd-tools-tar-gz-files/ http://www.cyberciti.biz/faq/freebsd-install-vmware-freebsd-tools-tar-gz-files/#comments Mon, 28 Feb 2011 11:58:19 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=10114 How do I install VMWare tools under FreeBSD guest operating systems?]]> http://www.cyberciti.biz/faq/freebsd-install-vmware-freebsd-tools-tar-gz-files/feed/ 0 KVM Virtualization: Start VNC Remote Access For Guest Operating Systemshttp://www.cyberciti.biz/faq/linux-kvm-vnc-for-guest-machine/ http://www.cyberciti.biz/faq/linux-kvm-vnc-for-guest-machine/#comments Mon, 04 Oct 2010 17:19:02 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=8930 I'm running a KVM virtual machine (FreeBSD 7 and Fedora Linux 13 desktop) under Redhat Enterprise Linux 5.5. However, I'm not getting the remote access via VNC (Virtual Network Computing) to access my Fedora Linux graphical desktop or FreeBSD console. How do I turn on VNC support without reinstalling both operating systems?]]> http://www.cyberciti.biz/faq/linux-kvm-vnc-for-guest-machine/feed/ 2 Linux KVM: OpenBSD Guest Hangs At Starting tty Flagshttp://www.cyberciti.biz/faq/kvm-virtualization-openbsd-guest-hangs-at-starting-tty-flags/ http://www.cyberciti.biz/faq/kvm-virtualization-openbsd-guest-hangs-at-starting-tty-flags/#comments Thu, 15 Jul 2010 20:25:49 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=8337 OpenBSD version 4.5 and above made changes in kernel which prevents booting OpenBSD using KVM technology. OpenBSD 4.4 runs with mbbios enabled. However, due to some sort of bug in KVM it does not boots. The workaround is to disable mpbios. This may or may not happen with your installation. ]]> http://www.cyberciti.biz/faq/kvm-virtualization-openbsd-guest-hangs-at-starting-tty-flags/feed/ 0 KVM virt-install: Install OpenBSD As Guest Operating Systemhttp://www.cyberciti.biz/faq/kvmvirtualization-virt-install-openbsd-unix-guest/ http://www.cyberciti.biz/faq/kvmvirtualization-virt-install-openbsd-unix-guest/#comments Thu, 15 Jul 2010 19:36:26 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=8314 OpenBSD is a UNIX like system based on Berkeley Software Distribution (BSD). It was forked form NetBSD and created by Theo de Raadt in 1995. OpenBSD is famous for quality code and documentation without compromising position on software licensing. OpenBSD is also well know for focus on security features such as Memory protection, cryptography, randomization and much more in default base installation. ]]> http://www.cyberciti.biz/faq/kvmvirtualization-virt-install-openbsd-unix-guest/feed/ 0 KVM: Start a Virtual Machine / Guest At Boot Timehttp://www.cyberciti.biz/faq/rhel-centos-linux-kvm-virtualization-start-virtual-machine-guest/ http://www.cyberciti.biz/faq/rhel-centos-linux-kvm-virtualization-start-virtual-machine-guest/#comments Wed, 14 Jul 2010 19:30:58 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=8296 There are various ways to start virtual machines at at boot time. This means you don't have to type virsh start vmName command. This can be done by marking a vm as autostart. ]]> http://www.cyberciti.biz/faq/rhel-centos-linux-kvm-virtualization-start-virtual-machine-guest/feed/ 0 Linux KVM: Disable virbr0 NAT Interfacehttp://www.cyberciti.biz/faq/linux-kvm-disable-virbr0-nat-interface/ http://www.cyberciti.biz/faq/linux-kvm-disable-virbr0-nat-interface/#comments Wed, 16 Jun 2010 09:26:12 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=7886 The virtual network (virbr0) used for Network address translation (NAT) which allows guests to access to network services. However, NAT slows down things and only recommended for desktop installations. To disable Network address translation (NAT) forwarding type the following commands:]]> http://www.cyberciti.biz/faq/linux-kvm-disable-virbr0-nat-interface/feed/ 8 CentOS / Redhat: Install KVM Virtualization Softwarehttp://www.cyberciti.biz/faq/centos-rhel-linux-kvm-virtulization-tutorial/ http://www.cyberciti.biz/faq/centos-rhel-linux-kvm-virtulization-tutorial/#comments Sat, 12 Jun 2010 10:46:29 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=7628 KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on x86 hardware containing virtualization extensions Intel VT or AMD-V. How do I install KVM under CentOS or Red Hat Enterprise Linux version 5.5?

This FAQ entry is part 1 of 7 in the series Redhat KVM Virtulization:

]]> http://www.cyberciti.biz/faq/centos-rhel-linux-kvm-virtulization-tutorial/feed/ 24 KVM Virsh: Redirect FreeBSD Console To A Serial Porthttp://www.cyberciti.biz/faq/linux-kvm-redirecting-freebsd-virtual-machines-console-to-aserialport/ http://www.cyberciti.biz/faq/linux-kvm-redirecting-freebsd-virtual-machines-console-to-aserialport/#comments Thu, 03 Jun 2010 07:57:15 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=7615 I'm using KVM to run multiple virtual machines under Redhat Enterprise Linux server 5.5. I've installed FreeBSD 7.x 64 bit as guest operating systems. How do I redirect the FreeBSD version 6, 7 or 8 virtual machine console to a serial port using virsh console command for management purpose from host itself? ]]> http://www.cyberciti.biz/faq/linux-kvm-redirecting-freebsd-virtual-machines-console-to-aserialport/feed/ 0 Linux: Find Out If CPU Support Intel VT and AMD-V Virtualization Supporthttp://www.cyberciti.biz/faq/linux-xen-vmware-kvm-intel-vt-amd-v-support/ http://www.cyberciti.biz/faq/linux-xen-vmware-kvm-intel-vt-amd-v-support/#comments Wed, 26 May 2010 06:12:20 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=7511 How do I find out if my system support Intel - VT / AMD -V hardware virtualization extensions for host CPU using the command line options?]]> http://www.cyberciti.biz/faq/linux-xen-vmware-kvm-intel-vt-amd-v-support/feed/ 17 KVM: Starting / Stopping Guest Operating Systems With virsh Commandhttp://www.cyberciti.biz/faq/linux-kvm-stop-start-guest-virtual-machine/ http://www.cyberciti.biz/faq/linux-kvm-stop-start-guest-virtual-machine/#comments Tue, 12 Jan 2010 11:37:34 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=7791 The virsh command can be used to mange local or remote guest operating systems. The program can be used to create, pause, and shutdown domains. It can also be used to list current domains. ]]> http://www.cyberciti.biz/faq/linux-kvm-stop-start-guest-virtual-machine/feed/ 4 KVM virt-install: Install FreeBSD / CentOS As Guest Operating Systemhttp://www.cyberciti.biz/faq/kvm-virt-install-install-freebsd-centos-guest/ http://www.cyberciti.biz/faq/kvm-virt-install-install-freebsd-centos-guest/#comments Tue, 12 Jan 2010 10:54:52 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=7714 virt-manager requires GUI locally and it is slow. On other hand virt-install is a command line tool for provisioning new virtual machines using the "libvirt" hypervisor management library. The tool supports both text based & graphical installations, using serial console, SDL graphics or a VNC client/server pair. The guest can be configured to use one or more virtual disks, network interfaces, audio devices, and physical host devices (USB, PCI). You can use the virt-install to create virtualized guests as follows to install FreeBSD or CentOS.]]> http://www.cyberciti.biz/faq/kvm-virt-install-install-freebsd-centos-guest/feed/ 0 Troubleshooting KVM Virtualization Problem With Log Fileshttp://www.cyberciti.biz/faq/troubleshooting-kvm-virtualization-problem-with-log-files/ http://www.cyberciti.biz/faq/troubleshooting-kvm-virtualization-problem-with-log-files/#comments Tue, 12 Jan 2010 10:40:51 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=7729 There are various log files stored on the host system to assist with debugging KVM related problems. In this tutorial, I will cover log file locations and tools used to track down KVM problems.]]> http://www.cyberciti.biz/faq/troubleshooting-kvm-virtualization-problem-with-log-files/feed/ 0 KVM virt-manager: Install CentOS As Guest Operating Systemhttp://www.cyberciti.biz/faq/kvm-virt-manager-install-centos-linux-guest/ http://www.cyberciti.biz/faq/kvm-virt-manager-install-centos-linux-guest/#comments Tue, 12 Jan 2010 09:31:21 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=7676 Now, you have installed the KVM software and required drivers on the host operating systems. You also configured bridged based networking which will provide direct access to the Internet. It is time to create your first guest operating systems. For demonstration purpose you will install CentOS Linux v5.5 using the Internet using virt-manager GUI tool. ]]> http://www.cyberciti.biz/faq/kvm-virt-manager-install-centos-linux-guest/feed/ 16 KVM: Install CentOS / RHEL Using Kickstart File (Automated Installation)http://www.cyberciti.biz/faq/kvm-install-centos-redhat-using-kickstart-ks-cfg/ http://www.cyberciti.biz/faq/kvm-install-centos-redhat-using-kickstart-ks-cfg/#comments Tue, 12 Jan 2010 09:31:19 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=7726 Kickstart is a network installation system for RHEL, Fedora and CentOS Linux distributions. Another good option is Cobbler which is a Linux provisioning server that centralizes and simplifies control of services including DHCP, TFTP, and DNS for the purpose of performing network-based operating systems installs. In this tutorial, I'm going to show you how to use kickstart file to install CentOS.]]> http://www.cyberciti.biz/faq/kvm-install-centos-redhat-using-kickstart-ks-cfg/feed/ 2 Linux Tuning The VM (memory) Subsystemhttp://www.cyberciti.biz/faq/linux-kernel-tuning-virtual-memory-subsystem/ http://www.cyberciti.biz/faq/linux-kernel-tuning-virtual-memory-subsystem/#comments Fri, 16 Oct 2009 09:29:09 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=5366 I've fast RAID-10 disk subsystem with multiple SCSI disks. Apps running under modern Linux kernel don't write directly to the disk. They write it to the file system cache which is managed by Linux kernel virtual memory manager. Since I've high performance RAID controller I need to decrease the number of flushes. How do I tune virtual memory subsystem under Linux operating systems for better performance?]]> http://www.cyberciti.biz/faq/linux-kernel-tuning-virtual-memory-subsystem/feed/ 5 How To Setup OpenVZ under RHEL / CentOS Linuxhttp://www.cyberciti.biz/faq/openvz-rhel-centos-linux-tutorial/ http://www.cyberciti.biz/faq/openvz-rhel-centos-linux-tutorial/#comments Thu, 06 Aug 2009 19:19:12 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=4661 Ineed to run more than instance of Linux operating system and different Linux distributions under CentOS. How do I use OpenVZ virtualization to optimize the usage of my Dell servers, and create test Linux VPS running Debian, Ubuntu, and CentOS Linux? How do I deploy OpenVZ under CentOS / RHEL Linux? Read RHEL / CentOS OpenVZ Virtualization Tutorial Series: ]]> http://www.cyberciti.biz/faq/openvz-rhel-centos-linux-tutorial/feed/ 3 Setup FreeBSD Jail With ezjailhttp://www.cyberciti.biz/faq/howto-setup-freebsd-jail-with-ezjail/ http://www.cyberciti.biz/faq/howto-setup-freebsd-jail-with-ezjail/#comments Thu, 11 Jun 2009 18:11:55 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=4046 How do I setup operating system-level virtualization that allows me to partition my FreeBSD-based server system into several independent mini-systems called jails.? I'd like to set one jail for mail and another for web server via 2 public IP address.]]> http://www.cyberciti.biz/faq/howto-setup-freebsd-jail-with-ezjail/feed/ 8 FreeBSD Jail Allow Ping / tracerouter Commandshttp://www.cyberciti.biz/faq/freebsd-jail-allow-ping-tracerouter-commands/ http://www.cyberciti.biz/faq/freebsd-jail-allow-ping-tracerouter-commands/#comments Sat, 09 May 2009 12:55:04 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=3763 I'm not able to ping from FreeBSD prison (jail). I'm able to resolve the names or use ftp / http for ports but ping and traceroute access is disabled. How do I allow virtualized jail application / users to perform traceroute and ping commands? ]]> http://www.cyberciti.biz/faq/freebsd-jail-allow-ping-tracerouter-commands/feed/ 0 Can I Use Multiple Virtualization Technologies Simultaneously under Linux?http://www.cyberciti.biz/faq/linux-run-multiple-virtualization-technologies-simultaneously/ http://www.cyberciti.biz/faq/linux-run-multiple-virtualization-technologies-simultaneously/#comments Fri, 16 Jan 2009 07:51:30 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=3083 Q. I was reading this article and wanted to try out KVM, XEN, VMWare and VirtualBox simultaneously on my desktop system with 2GB RAM? Why I'm not able to use run multiple virtualization technologies simultaneously under Ubuntu Linux? Can a Linux server run multiple virtualization technologies simultaneously?]]> http://www.cyberciti.biz/faq/linux-run-multiple-virtualization-technologies-simultaneously/feed/ 4 FreeBSD: Nginx Virtual Hosting Configurationhttp://www.cyberciti.biz/faq/freebsd-nginx-namebased-virtual-hosting-configuration/ http://www.cyberciti.biz/faq/freebsd-nginx-namebased-virtual-hosting-configuration/#comments Thu, 09 Oct 2008 21:09:05 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=2126 Q. How do I configure Nginx Web server for virtual hosting (host multiple websites under same IP address - name based virtual hosting)?]]> http://www.cyberciti.biz/faq/freebsd-nginx-namebased-virtual-hosting-configuration/feed/ 6