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  Be careful when running knife vault command

While using Chef, one would frequently use knife commands which are used to manage resources on the Chef server. One can list all nodes, data bags, vault items and many other stuff on the Chef server. In this post, we would cover one command which may need your attention when using it -- knife vault. On Chef server, one can store data to data bags which can be accessed by registered clients. These data bags usually store the data in plain text format. In some cases, one would need to store data ...

   KNIFE VAULT,KNIFE DATA BAG,CHEF-VAULT,CHEF     2017-08-19 00:26:54

  How to commit code to OpenStack

If you want to make contributions to OpenStack, the best way to start is to help the community with blueprint or submit bug fix. To commit codes, you need to conform to some rules in the community. Work flow Register an OpenID Apply for a CLA certificate Apply for company CLA certificate Update contributor list Join OpenStack Contributors group and OpenStack group Set up SSH Keys Get a blueprint/bug git clone codes to local disk. Configure user name and user email and openid Modify codes in a l...

   OpenStack,Contribution     2013-08-04 23:04:45

  Create cron job on CentOS

These two days, I am building a website and deploying it on a VPS server which uses CentOS 5. I don't have cPanel or Plesk for my account, so I need to install and configure everything myself including Apache, PHP, MySQL and FTP server, also today's topic cron job. Since my website has a ranking algorithm to calculate the rankings of each link and update the ranking on database and I need to calculate the rankings every 5 minutes, so I think to use cron jobs. Here are what I have done which may ...

   cron job,crontab,CentOS,linux,php,example     2012-06-11 09:23:45

  Command line todo list manager-- Taskwarrior

What is Taskwarrior? Taskwarrior is a task management tool in a terminal environment, it has powerful functions. Here is a short description about it from its official website: It maintains a task list, allowing you to add/remove, and otherwise manipulate your tasks. Task has a rich set of subcommands that allow you to do sophisticated things. You'll find it has customizable reports, charts, GTD features, device synching, documentation, extensions, themes, holiday files and much more. Installa...

   Taskwarrior,Task management     2013-08-12 23:44:20

  Landing page optimization : Less is more

There is a question on Quora : Why doesn't Quora show interesting questions/answers on their landing page? Why is it this? not this? Quora's product manage gives his answer to this question, it's agreed by many users in this community. Here is his answer: The logged out homepage is pretty sparse now mostly because it hasn't been given much treatment since the initial product launch. But we have plans on redesigning it and testing different variations (some with less info on the page, some with...

   Landing page,Optimization,Principle     2012-11-03 01:50:07

  Kubernetes: Docker out

Recently，The hottest news in the Kubernetes circle that docker will be deprecated has been confirmed by the release of 1.20. Docker support in the Kubelet is now deprecated and will be removed in a future release. The Kubelet uses a module called “dockershim” which implements CRI support for Docker and it has seen maintenance issues in the Kubernetes community. We encourage you to evaluate moving to a container runtime that is a full-fledged implementation of CRI (v1alpha1 or v...

   DOCKERSHIM,DOCKER,KUBERNETES     2020-12-19 21:10:21

  6 Great Ways to Design Amazing PWA’s

Why PWA v/s Native Mobile apps a wrong question to ask. PWA has already gathered a lot of momentum recently and is structured to give “App like” experience to its user base. Reveal all the extra layers underneath and create magic with brand new ideas to design progressive web apps. What comes to your mind when you imagine leading a progressive life? Definitely, it is going to be far better than  the previous one. Progressive Web Apps (PWA’s) are going to work to outweigh ...

   WEB DESIGN,PROGRESSIVE WEB APPS,PROGRESSIVE WEB APP TECHNOLOGY,COMMON UI/UX MISTAKES     2018-02-28 03:30:46

  What can .htaccess file do?

A .htaccess file is a directory-level configuration file supported by several web servers, that allows for decentralized management of web server configuration. What can a .htaccess file do? We summarized some of them here.  Hope it may help you. 1. Timezone settingSometimes when you use date() or mktime() functions in PHP, , it may display some weird information because of the timezone difference. For example, one possible warning is :Warning: date(): It is not safe to rely on the syste...

   .htaccess,setting,tip     2012-06-15 06:39:39

  5 Great Hacks to Learn Before Launching a Startup

Maybe months or years have gone planning for a startup and finally you are ready to enter into the world of small business.  Excited enough to hit the “Launch” button. As the bulk of your business is good, so the rest of it must be the same. You think like that, right? But hey, you are wrong there. You may be selling the next big thing, but it does not matter until you have frozen your brand name in the niche market and gained a decent amount of credibility. But you can do that...

   SOFTWARE,STARTUP, ENTREPRENEUR     2016-06-21 09:33:05

  Canonicalize XML in Java

XML canonicalization is often used when there is need to create digital signature to be sent to peers for verification. Since digital signature is created based on XML data, the XML data has to be canonicalized before its signature value can be calculated. Even an extra space may affect the signature value calculated, hence it must follow some rules to canonicalize the XML data so that it has a standard format. This is why W3C created specification Canonical XML Version 1.1. This specificat...

   JAVA,XML,JAVA SECURITY     2016-01-20 01:39:45

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