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In this post, creating a file-backed virtual block device (VBD) and installing Fedora 20 in the Xen DomU via internet will be introduced. This domain is created on a Fedora 20 Dom0 as introduced in Installing Xen on Fedora 20 as Domain-0. For better performance, you may consider using LVM [...]
Mon, Jul 28, 2014 12:03:00 AM, Continue reading at the source
I ever introduced Installing Xen on Fedora 17 as Domain-0 as the first try to use the xen package delivered from Fedora and get away from manually compiling Xen and patching the kernel. In this post, I introduce installing Xen Dom0 on Fedora 20. Installing Xen First, install the xen [...]
Fri, Jul 25, 2014 2:33:00 AM, Continue reading at the source
It is common to set up git servers to host git repositories. Branching is lightweight in git and a very friendly mechanism to manage code. Here, I summarize a cheatsheet of common git branching commands for working on repositories from a git server. This post assumes that you have basic [...]
Thu, Jul 24, 2014 5:36:00 AM, Continue reading at the source
It is continuously discussed that some Fedora users do not like the font rendering in Fedora Linux and there are solutions to improve the font rendering with potentially non-free or non-licensed software/fonts. However, with only the open source fonts and software and little tricks, the font rendering on Fedora can [...]
Wed, Jul 23, 2014 5:15:00 AM, Continue reading at the source
I summarize some commonly used commands that I find useful for working with git submodule. For the list of full commands, check the git submodule manual. In the following commands, I take scala-mode2 as an example as the submodule. Add a submodule git submodule init git submodule status git submodule [...]
Thu, May 29, 2014 12:04:00 PM, Continue reading at the source
It seems thunderbird automatically wrap lines by 72 characters. How to make thunderbird not wrap lines automatically? First, open the “config editor”: go to “Edit | Preferences”, select the “Advanced” panel, select the “General tab”, and click “Config Editor…”. In the config editor, search for mail.compose.wrap_to_window_width and change it value [...]
Thu, May 29, 2014 7:30:00 AM, Continue reading at the source
Programs may want to catch the kill signals sent by the kill command in C programs on Linux so that it can gracefully shutdown itself before it is killed. For example, I have a daemon progd running, and it may be killed by pkill progd. The progd may want to [...]
Thu, May 29, 2014 5:38:00 AM, Continue reading at the source
git is a great tool and it is common to have a git server over SSH possibly managed by gitolite. However, there are situations that we can not directly connect to the git server but be able to SSH to another node that can connect to the git server. The [...]
Wed, May 21, 2014 2:55:00 PM, Continue reading at the source
We have many hosts with internal/LAN IPs like 10.0.3.* behind a gateway and the hosts with LAN IPs can connect to the Internet through the gateway. We used iptables to forward port from the gateway to internal IPs so that users from hosts with Internet connections can SSH to the [...]
Wed, Apr 30, 2014 4:38:00 AM, Continue reading at the source
ssh/scp are convenient and handy tools on Linux. Is it possible to further improve its speed/performance, especially when transferring files that are large (GBs, not MBs or KBs)? The answer is of course yes. ssh supports several ciphers. The ciphers used have a large impact on the performance. Jens Neuhalfen [...]
Thu, Apr 24, 2014 1:39:00 PM, Continue reading at the source

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