A script for backing up file-backed Xen DomU is introduced in this post. This script can be changed to similar platform. In our cluster, virtual machines are stored under /lhome/xen/. Virtual machine with id vmid is stored in directory vmvmid. The raw image disk file name can also be derived from vmid. Some more details
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Tag: Fedora
An I/O Performance Comparison Between loopback Backed and blktap Backed Xen File-backed VBD
Posted onI have done some I/O performance benchmark test of Xen DomU. For easier management, some of our DomU VMs are using file-backed VBDs. Previously, our VMs are using Loopback-mounted file-backed VBDs. But blktap-based support are recommended by Xen community. Before considering changing from loopback based VBD to blktap based VBD, I have done this performance
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How to Remote Control Linux Server Using VNC through SSH Tunnel
Posted onSometimes we need to have the GUI of some application on the remote server. ssh’s X11 forwarding with “-X” parameter is a good and fast method. But if we want to have a whole desktop environment, vnc is a good choice. In this post, the method of how to control remote server using vnc through
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How to Flush DNS Cache of Linux and Windows Client
Posted onWe may need to flush DNS cache of our client when the site’s DNS has been changed. Flush DNS cache of Linux with NetworkManager/dnsmasq You may simply restart NetworkManager by sudo systemctl restart NetworkManager Flush DNS Cache on (Old) Linux with nscd 1) Use su – to get root privilege or sudo with the following
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A Simple CPU and Memory Performance Test of Xen Dom0 and DomU
Posted onPlease refer to Setting Up Xen Dom0 on Fedora : Xen 3.4.1 with Linux Kernel 2.6.29 on Fedora 12 for the platform of this test (this test runs on Fedora 11, however). I have done some simple performance test on DomU and Dom0 and compare with the performance on physical machines. These test are simple,
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The WordPress Desktop Client – lekhonee
Posted onI find a desktop client for publishing to WordPress blogs – lekhonee[1]. I find it interesting and easy to use. This is the first post using it. The interface is simple, but it can provides most of the functions: * Writing post. * Select categories. * Add tags. * Load and Edit the old post.
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Fedora 中文字体设置
Posted onFedora 一直有中文字体难看的问题, 尤其是在英文环境中. 使用本文中的配置方法可以得到令人满意的中文效果. 此方案中使用字体都为开源且在Fedora源中自带. 此方案对 Fedora 9 – 20 有效. 对于后续版本支持我会确认并更新此文章. 此方案对Gnome, KDE都有效. Firefox 中也有中文难看的问题, 后面会提到. 快速配置方法 如果你想马上配置好，请使用如下命令。此方法测试使用效果良好。 # yum install cjkuni-ukai-fonts cjkuni-uming-fonts # wget https://raw.githubusercontent.com/zma/config_files/master/others/local.conf \ -O /etc/fonts/local.conf 相关英文字体配置可以参考：Improving Fedora Font Rendering with Open Software and Fonts Only. Fedora 系统中文字体的配置方案 使用uming和ukai字体，即AR PL UMing CN等. 中文字体和等宽字体效果如图所示(点击看大图, Firefox 中文字体设置在后面会提到). 方法如下: 安装字体 首先安装这两个字体: cjkuni-ukai-fonts cjkuni-uming-fonts (在Fedora
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Installing NVIDIA Driver in Fedora
Posted onUsing rpmfusion’s rpm packages to install NVIDIA driver in Fedora is introduced in this post. First, check the proper drivers for the card on [1]. 1. Add rpmfusion. Enable RPM Fusion repositories 2. Install the driver # yum install kmod-nvidia xorg-x11-drv-nvidia The reboot system. 3. Edit /etc/X11/xorg.conf # nvidia-xconfig The nouveau module conflicts with the
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How to Create ISO Image from DVD Disk on Linux
Posted onDVD disks are still commonly used in some areas while the disks are not fast and convenient enough for frequent usage. For frequent usage or archiving, an image of the DVD on hard drives will be better. ISO images do not use a particular container format. They are just a sector-by-sector copy of the data
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Compiz-fusion on Fedora
Posted on1. Install relevant packages #yum install ccsm emerald-themes compizconfig-backend-gconf fusion-icon-gtk emerald compiz-fusion compiz-fusion-gnome libcompizconfig compiz-gnome compiz-bcop compiz compizconfig-python compiz-fusion-extras compiz-fusion-extras-gnome 2. Start compiz-fusion by using command “fusion-icon”. It can be found in “Applications -> system tools -> fusion-icon”. It will be more convenient if “fusion-icon” is added to autostart list by adding a entry in
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ALSA Problem of Fedora 11 on Compaq Presario CQ35-240TX
Posted onWhen I get my new Compaq Presario CQ35-240TX, of course, the first thing is to install Fedora ;) But unfortunately, after installation there is no sound! It seems there is something wrong with the driver configuration. Here is a solution to this: Add these two line at the end of /etc/modprobe.d/dist.conf options snd-hda-intel model=hp-m4 enable=1
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How to Speed Up Firefox DNS Lookup in Linux
Posted onHow to speed Up Firefox DNS Lookup in Linux: 1. Close IPV6 support # echo “alias net-pf-10 off” >> /etc/modprobe.conf # echo “alias ipv6 off” >> /etc/modprobe.conf Type “about:config” into the address line and enter. Set “network.dns.disableIPv6” to “true” 2. Some other tweaks Type “about:config” into the address line and enter. Set “network.http.pipelining” to “true”
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Add More Loop Device in Linux
Posted onWe need more loop devices on Linux than the default number (most commonly 8) some time, such as we are building 12 or more virtual machines on top of xen using loop device backed VBD. In this post, we want to use 32 loops. 1. If loop device is compiled directly in the kernel Pass
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Configure sMobileNet of HKUST on Linux
Posted onHow to configure NetworkManager to connect to sMobileNet in HKUST is introduced in this post. The wireless network connection configuration for sMobileNet in NetworkManager The SSID is “sMobileNet” Wireless security is “WPA & WPA2 Enterprise” Authentication is “Protected EAP (PEAP)” Anonymous identity is “” (empty) CA certificate is “(None)” (there will be a warning appear,
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Create and Manage Virtual Machines on Xen
Posted onIn this post, these content are introduced: Create and manage file-backed virtual block device (VBD) for virtual machines on xen. Install Fedora 11 via internet as DomU on top of xen. Manage virtual machines using xm. Create file-backed VBD: The actual space of VBD will be the amount of disk the virtual machine used. And
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Chinese Charactor Configuration on Fedora 11
Posted on最新的更新版本请看: Fedora 中文字体设置. 使用Linux时我个人倾向使用英文环境系统，而Fedora11在英文环境下中文字体有时会不太好看，经常遇到需要字体优化美化的问题。 以下是我的配置方案，经测试效果还算不错，解决了Fedora 11 中文字体难看的问题： 方案1：使用uming和ukai字体，即AR PL UMing CN等。 关键是使用的字体包如下： 首先要安装这两个字体： cjkuni-ukai-fonts cjkuni-uming-fonts 然后配置一下~/.fonts.conf文件. 使sans-serif serif monospace字体中文使用uming/ukai即可. 我的.fonts.conf文件可以从这里下载(两种选择, 我喜欢前者): https://github.com/zma/config_files 使用Liberation和uming/ukai字体: .fonts.cofn.liberation 使用dejavu和uming/ukai字体: .fonts.conf.dejavu 下载后放到自己的$HOME下改名为.fonts.conf就可以了。 使用uming字体效果如下（请放大后看效果）： 方案2：安装文泉驿字体，这个非常简单，安装相应包即可了。 如果喜欢其它的字体选择性的安装上就可以了，只要注意只安装自己需要的就行了。有人使用微软雅黑字体，首先这是侵权的，其次开源的字体做得其实已经很不错了。 最后将字体平滑选项打开, KDE和gnome都有相关设置方法。 以上内容只是针对使用xft字体系统的设置。对于使用核心字体系统的X程序来说字体依然会出现很丑的情况。 下面是针对emacs的设置方法： 首先需要安装这个字体包： xorg-x11-fonts-misc 注意到在中文系统下emacs的中文显示非常好，而在英文环境中去非常差，我们可以利用这一点，在运行emacs前首先将系统环境设为中文即可。 在~/bin/下建立一文件ema 内容如下： #!/bin/bash rm -f ~/.emacs ln -s ~/.emacs.x ~/.emacs LANG=zh_CN.UTF-8 emacs –fullheight -r $* 然后加入执行权限即可： chmod +x
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Beautiful Desktop – Gnome 2 of OSX style on Linux
Posted onScreenshots of the desktop: Metacity theme: Humanoid-OSX-Blend GTK 2.x theme: OSX-theme-mod 0.9 GNOME Icon: OSX 3.3 X11 Mouse theme: MacOSX PantherX Mouse Theme[For Baghira] 1.1 Wallpaper: Elementary The system: Fedora 10 Gnome 2.24.3 Updated on 6 Mar. 2010. Screenshots added.
Creating and Running Virtual Machine Using VMware Player and qemu-img
Posted on基于VMware Player, qemu-img创建和运行虚拟机 Linux系统上的免费个人虚拟机方案. 1. 创建虚拟硬盘映象文件： qemu-img create -f vmdk WindowsXPPro.vmdk 10G 2. 创建.vmx虚拟机配置文件： 这是一文本文件. WindowsXPPro.vmx内容: config.version = “8” virtualHW.version = “3” ide0:0.present = “TRUE” ide0:0.filename = “WindowsXPPro.vmdk” memsize = “256” MemAllowAutoScaleDown = “FALSE” ide1:0.present = “TRUE” ide1:0.fileName = “auto detect” ide1:0.deviceType = “cdrom-raw” ide1:0.autodetect = “TRUE” floppy0.present = “FALSE” ethernet0.present = “TRUE” usb.present =
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How to Create, Mount, and Burn ISO Images on Linux
Posted onLinux has many tools for mounting, creating and burning iso image files. In this posts, I will introduce how to use the iso files on Linux. The tools we used in this post are mount, genisoimage and wodim. 1. Mount an iso image file Mounting an iso on Linux is straightforward. We mount the iso
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Setting Up a Git Server Using Gitosis
Posted onUpdate: Since gitosis is not maintained and supported, please check out gitolite for setting up a new git server. (see the comment from Sitaram Chamarty, the gitolite author, the author of gitolite.) Gitosis is a piece of software writen by Tommi Virtanen for hosting git repositories. It manages multiple repositories under the same user account.
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