Linux IO模式及 select、poll、epoll详解
注：本文是对众多博客的学习和总结，可能存在理解错误。请带着怀疑的眼光，同时如果有错误希望能指出。 同步IO和异步IO，阻塞IO和非阻塞IO分别是什么，到底有什么区别？不同的人在不同的上下文下给出的答案是不同的。所以先限定一下本文的上下文。 本文讨论的背景是linux环境下的network IO。 一 概念说明 在进行解释之前，首先要说明几个概念： - 用户空间和内核空间 - 进程切换 - 进程的阻塞...
View ArticleNo worries when elpa is down
I use one liner shell command to clone Emacs Lisp Package Archive (ELPA): mkdir -p ~/elpaclone && cd ~/elpaclone && curl -L https://elpa.gnu.org/packages/archive-contents | sed...
View ArticleLinux下oracle数据库启动和关闭操作
第一步：登陆 root登陆之后切换到oracle用户上，输入 su oracle 第二步：连接 在oracle用户下，输入 sqlplus /nolog 第三步：使用管理员权限 输入 connect /as sysdba 第四步：启动/关闭服务 输入 startup startup参数 不带参数，启动数据库实例并打开数据库，以便用户使用数据库，在多数情况下，使用这种方式！...
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Build a pan and tilt camera with Raspberry Pi + Arduino
Although there are plenty of DIYsurveillance cameras alreadyout there,MakeUseOf has taken it to the next levelwith the ability to remotely control its view. This DIY pan and tiltcamera usesa Raspberry...
View ArticleTechnical Debt and the Ongoing Battle Against It
I have been trying to fit a lot of square pegs into round holes lately. Eliminating technical debt with modern day DevOps practices to reduce costs is seldom fun or glamorous but is very often...
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GNOME's GUADEC 2016 Videos Now Available
GNOME's GUADEC 2016 Videos Now Available Written by Michael Larabel inGNOME on 15 August 2016 at 08:04 AM EDT.Add A Comment Running this weekend in Karlsruhe, Germany was the 2016 GUADEC conference --...
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KDE Plasma 5.8 To Finally Allow LLVMpipe, Drops EGL On X11 Option
KDE Plasma 5.8 To Finally Allow LLVMpipe, Drops EGL On X11 Option Written by Michael Larabel inKDE on 15 August 2016 at 08:26 AM EDT.Add A Comment There are several changes to KWin's OpenGL compositor...
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Using Note Widgets on TestTrack Dashboards
Hopefully, you are already usingTestTrack dashboards to better communicate with your team. Now, you have even more flexibility to customize your dashboard using note widgets. Note widgets can display...
View ArticleFlock, 2016
Reporting live from Mumbai airport. As, flight to Pune has some good waiting time and memories are kind of fresh in the mind, I have decided to write my flock, 2016 blog post. Journey is indeed long,...
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Firefox 49 for Linux Will Let You Watch Netflix Without Plugins
Netflix running in Google Chrome on linux Fed up of havingto useGoogle Chrome each timeyou want to goon a Netflix binge? I’ve got some good news for you. Mozilla planto support plugin-free streaming...
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用树莓派驱动德飞莱16x16点阵屏显示汉字
这周尝试用树莓派驱动了 LY-LED16x16B V2.1 点阵屏。之所以选用这一款是因为它是 16 X 16 点阵（实际上是 4 块 8 X 8 LED 拼起来的，只不过已经集成好了）。LY-LED16x16B V2.1 本身是用于单片机的，官方提供了 51 单片机和 Arduino 下的测试程序。不过，我们有强大的树莓派，既然单片机能驱动，树莓派应该也不是问题。 德飞莱...
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Lunch & Learn with OpenStack Containers
Follow the instructions in this article to spend around an hour over your lunch time to getan entire Ubuntu OpenStack cloud up and running in containers on a single machine. The resulting cloud will...
View Article[Linux] 简单了解Linux的Page Cache
在linux下，Page Cache可以加速访问磁盘上的文件，这是因为，当它第一次读或写数据到类似硬盘一样的存储介质时，Linux会存储这些数据到闲置的内存区域，它充当于一个缓存的角色，如果以后读取数据，他就可以迅速的在缓存中读取，这篇文章将会简单的让你了解有关Page Cache的一些信息。 内存使用 在Linux下，有多少内存被Page Cache使用，可以用free -m查看 Cached...
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Linux developer loses case against VMware
linux kernel developer Christoph Hellwig has lost his case against virtualisation company VMware. Hellwig claimed the outfit had violated version 2 of the GNU General Public Licence and says he will...
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The road to TOR
The road toTOR Happy Independence Day to all. I had been looking forward to this day so I can use to share with my brothers and sisters what little I know about TOR . Independence means so many things...
View ArticleUbuntu Fan Launches Bid To Get ZTE to Make an Ubuntu Phone
“This is your opportunity to let your voice be heard and for you to tell us what to build. Along the way in this fun and creative process, we’re also giving away prizes!”, ZTE say of the project. The...
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Install WordPress 4.5 in Ubuntu 16.04 with LAMP stack
There is no doubt that WordPress is the popular and most widely used Content Management System for websites and blogs. It is free, open source CMSbased on php and mysql. As of April 2016, more than 60...
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Install Ansible on RHEL
Install Ansible onRHEL Posted byZachary Flower on August 15, 2016August 15, 2016 As far as automated configuration management tools go, Ansible is “the new hotness” on the market. I admit, I am pretty...
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Save 97% off aCompTIA Linux+ Certification Exam Prep via Neowin Deals
Today's highlighted deal comes from ourELearning section of Neowin Deals, where you can save 97% off a CompTIA linux+ Certification Exam Prep . Start training to become a well-compensated Linux System...
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Alternative System Monitor Applet For LXDE, Xfce, And MATE: Multiload-ng
Multiload-ng is a GTK2 graphical system monitor for the Xfce, LXDE, and MATE panels, forked from the old GNOME Multiload applet. It can also run in a standalone window. Multiload-ng features:...
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