Questions and answers.
Converting a string to a long in C is a common operation that can be useful in various programming tasks. In this post, we will explore how to use the strtol and strtoul C library functions to convert a string to a long in C. Using strtol and strtoul The strtol and strtoul functions are…
Are there some good free CDNs on the Web? There are some free CDNs in the Web. Cloudflare: https://www.cloudflare.com CloudFlare protects and accelerates any website online. Once your website is a part of the CloudFlare community, its web traffic is routed through our intelligent global network. We automatically optimize the delivery of your web pages…
How to download the video playing in Chrome? Download the video playing in Chrome. Checkout the “FVD Video Downloader”: FVD Video Downloader If you are using Firefox, DownloadHelper ( http://www.downloadhelper.net/ ) can handle videos even youtube very well.
As a WordPress user, you may have noticed that the default HTML editor lacks some of the features that you need for your content. Fortunately, you can add custom buttons to the WordPress HTML editor to make your content creation experience more efficient and productive. In this post, we will explore how to add custom…
Any suggestion on the hosting services? Seems Hostgator is great: http://www.warriorforum.com/internet-marketing-product-reviews-ratings/362470-hostgator-bluehost-dreamhost-pair-com.html I was considering moving to Hostgator from Dreamhost. Dreamhost has less limitations after comparing it with others (e.g. the 250k inodes number limitation). I will stick with it. Moreover, with CloudFlare enabled ( https://www.systutorials.com/b/web/3218/cloudflare-with-dreamhost/ ), it looks better.
The built-in canonical URL function since WordPress 2.9 is great. But under some situation, it is not needed. For example, all the Mingle Forum threads’ canonical URL is set to the URL of the page that contains the [mingleforum] shortcode, which, of course, is wrong. How to diabled it? We can disabled WordPress’s Built-in Canonical…
When managing many hosts, answering 100s of “yes” can make us crazy. In a trusted environment, let ssh automatically add the new hosts to the list of known hosts and free us from typing “yes”es. How to enable it? Method 1. Passing option to ssh ssh -o StrictHostKeyChecking=no username@host Method 2. Configuring ~/.ssh/config To automatically…
By default, Vim does case sensitive search. How to make case-insensitive search in Vim? By default, Vim does case sensitive search. :set ignorecase can set Vim to conduct case insensitive search. However, it also affects substitutions, which is not we want However, how to do a case insensitive search only when it is needed? Use…
Pasting code from another application to Vim is a nightmare. The autoindent features of Vim drive you crazy. How to make it easier to use? Pasting code from another application to Vim is a nightmare. The autoindent features of Vim will drive you crazy. What help you out is the “paste mode”. To paste code…
How to enable the author information in Google search results as shown for many posts? As a post writer, we may want our authorship information to appear in search results. To do this, we need a Google+ Profile with a good, recognizable headshot as the profile photo. Then, verify authorship of our content by associating…
How to disable/delete the current keyrings on gnome? If the Gnome keyrings are not needed, or we forget the password, we can disable/delete the current keyrings. The keyrings are stored under ~/.gnome2/keyrings/ To disabled or delete current keyrings, we can simply delete this folder: rm -rf ~/.gnome2/keyrings/ Remember to backup this directory if you still…
Latex is a popular document preparation system that is widely used for creating scientific and technical documents. Compiling Latex documents on Linux is a straightforward process that requires only a few Latex packages and a set of commands. By following the steps outlined in this post, you can easily compile Latex documents on your Linux…
How to disable automatic comment insertion in Vim? Add to ~/.vimrc: au FileType c,cpp setlocal comments-=:// comments+=f:// More: http://vim.wikia.com/wiki/Disable_automatic_comment_insertion
What are the Google Chrome keyboard and mouse shortcuts for Linux and Windows? Keyboard shortcuts of Chrome can make it easier to control the browser and save our time. Here are a list of commonly used shortcuts: Ctrl+T Opens a new tab. Press Ctrl and click a link. Or click a link with your middle…
How to set up Firefox Sync? The online Firefox help provides a very good tutorial on setting up Firefox sync across computers and other devides: http://support.mozilla.org/en-US/kb/how-do-i-set-up-firefox-sync
How to input smiley faces in iPhone? I use Emoji Free app to enable the Emoji input methods. It is quite good and enables inputing of many nice smiley faces and icons. The app from App Store:Â Emoji Free app.
How to export a work file to PDF in Office 2007? 2007 Microsoft Office Add-in: Microsoft Save as PDF or XPS:Â http://www.microsoft.com/en-us/download/details.aspx?id=7 This download allows you to export and save to the PDF and XPS formats in eight 2007 Microsoft Office programs. It also allows you to send as e-mail attachment in the PDF and XPS…
How to install noip2 on Linux to update my no-ip domain? Check the post at: https://www.systutorials.com/4677/how-to-install-noip2-on-linux/ To make noip2 service automatically update with your latest IP, add a crontab entry for root: 0 */5 * * * /sbin/service noip restart The noip2 service will be restarted every 5 minutes. When the service is restarted, it…
Windows 7 64-bit fails to install on VirtualBox on Linux with status code 0xc0000225: “Windows failed to start. A recent hardware or software change might be the cause. To fix the problem: 1. insert your Windows installation disc and restart your computer. 2. Choose your language settings, and click “Next.” 3. Click “Repair your Computer”….
I configured the Linux password-less automatic ssh login as in this post . However, it still does not work for me. Any method to check it? The log in log /var/log/secure may give some clue on it. For example: Aug 20 23:16:10 doppler sshd[11143]: Authentication refused: bad ownership or modes for directory /home/useraaa tells us that…