How to enable RPM Fusion for CentOS 6.6?

ByEric Ma Mar 24, 2018Feb 26, 2019

Enable RPM fusion on RHEL 6 or compatible like CentOS:

su -c 'yum localinstall --nogpgcheck 
http://download1.rpmfusion.org/free/el/updates/6/i386/rpmfusion-free-release-6-1.noarch.rpm 
http://download1.rpmfusion.org/nonfree/el/updates/6/i386/rpmfusion-nonfree-release-6-1.noarch.rpm'

It will install https://fedoraproject.org/wiki/EPEL. If it fails to install EPEL automatically, you will need to install it manually.

Reference: http://rpmfusion.org/Configuration

Linux | Software

How to Convert JPG Images to EPS
ByEric Ma Jul 13, 2013Jan 19, 2016

I write a lot latex documents and most of the documents have images in it. Latex deals EPS very well, while sometimes we need to add JPG / PNG images to it. I find converting the JPG images to EPS ones is the most convenient way to embed JPG images to latex documents. On Linux,…

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QA

Why does ; after & lead to unexpected token error in bash on Linux?
ByEric Ma Mar 24, 2018Mar 24, 2018

The command using ‘;’ after ‘&’ like ssh host1 hostname &; ssh host2 hostname & Leads to error like bash: syntax error near unexpected token `;’ Why does ; after & lead to unexpected token error in bash on Linux? And what’s the solution? The fix The quick fix is to change your command to…

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Linux

Fedora 中文字体设置
ByEric Ma Jul 13, 2013Jan 1, 2020

Fedora 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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Linux

Making dnf/yum Not Update Certain Packages
ByEric Ma Jul 13, 2013Aug 23, 2020

We may not want to update some packages such the kernel on a stable server while updating the system. If we run “dnf update” or “yum update”, we may get suggested by dnf/yum to install all the packages with updates. In this post, how to make dnf/yum not update certain packages such the kernel when…

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Tutorial

Reading List for Distributed Systems and Cloud Computing
ByEric Ma Sep 15, 2012Aug 30, 2020

Understanding the literature is usually the first step to do research, which is the same for systems research on cloud computing. A reading list may help a lot to those that just start in cloud computing research. Prof. Lin Gu, my PhD supervisor, compiled a reading list for system research on cloud computing. The reading…

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QA

How to use ioprio_set in linux c
ByWeiwei Jia Mar 24, 2018Jan 7, 2020

Since there is no glibc wrapper for ioprio_set in linux c, we need to call this API with some definition. Using syscall in linux as follows. syscall(SYS_ioprio_set, IOPRIO_WHO_PROCESS, pid, IOPRIO_PRIO_CLASS(IOPRIO_CLASS_IDLE)); Some other definitions to declare above macros. 69 enum { 70 IOPRIO_CLASS_NONE, 71 IOPRIO_CLASS_RT, 72 IOPRIO_CLASS_BE, 73 IOPRIO_CLASS_IDLE, 74 }; 75 76 enum { 77…

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