Compression is a simple way to speed up the site. PHP’s gzip compression is excellent. And using it is very convenient: Simply put these codes before any HTML content at the beginning of the PHP script: <?php if (substr_count($_SERVER[‘HTTP_ACCEPT_ENCODING’], ‘gzip’)) ob_start(“ob_gzhandler”); else ob_start(); ?> In WordPress, the suitable position for these codes is the beginning
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Category: Tutorial
How to Redirect WordPress Feed to Feedburner Using .htaccess
Posted on.htaccess is a powerful tool. Let’s look at how to using .htaccess to redirect WordPress feeds to feedburner. Let’s use my blog as the example. The WordPress’s feed url of my blog is https://www.systutorials.com/feed/. Now I want to redirect it to feedburner with url http://feeds.feedburner.com/systutorials . The idea is quite straightforward: For every request to
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Friendly WordPress Navigation Using Page Numbers Instead of Next and Previous Links
Posted onThe navigation will be more user friendly with page numbers instead of next and previous links since users can navigate much quicker to the page they want to see especially when there are a lot of pages. It is also good method for SEO (Search Engine Optimization) because it creates a tighter inner link structure.
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How to Redirect a Page with HTTP 301 in PHP
Posted onHTTP 301 Redirect is an SEO friendly way to redirect readers to a page’s new location. There are a lot of benefits of using HTTP 301 Redirect. These benefits can be found in the htaccess method post. htaccess or PHP can be both used for sending 301 redirects. The htaccess method can be found in
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Change WordPress’s Excerpt Length
Posted onThe default excerpt length of WordPress is 55 words. Some one like me may want to change the excerpt length. I like the have a smaller excerpt length for the homepage. WordPress provides a interface for changing the default excerpt length. The method is very simple and easy. Put these codes into the function.php file
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Using noindex Meta Tag in WordPress to Prevent Search Engines Indexing Categories, Tags and Archives
Posted onWordPress may show “duplicate” content which may potentially confuse search engines. Duplicate content won’t hurt much, unless it is spam or keyword stuffing, as said by Matt Cutts, and Google may just ignore the duplicate content. However, instead of letting the search engines decide which pages of the duplicate ones are important, we may only
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Put the Categories, Archives and All Posts into Pages
Posted onI prefer putting pages that contains all the categories, archives and even all the posts in one page to putting these links in the side bar. Actually, most of time it needn’t to stay on every pages. And if it is in the side bar, the search engine will see these links in every page
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How to Change the Site’s Default 404 Error Not Found Page
Posted onThe apache’s default “404 Error not found” page seems ugly. And may some hosting service put theire ads in it. We can add some entry in .htaccess to change the defualt 404 error page. This method can also be used for some other error codes. A list of the server returned codes can be found
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Use Excerpt in Index, Category, Tag and Arhieve Pages for WordPress
Posted onBy default, all of the content of the post is shown in index, category, tag, archive and search pages. This is duplicate contents which may cause search engine penalty. The better way is using excerpt in index, category, tag and arhieve pages. By doing this the duplication can be avoided and the blog is optimized.
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How to Redirect Old Domain to New Domain Using htaccess Redirect
Posted onI want to move the sub domain blog.pkill.info to systutorials.com permanently. I can manage all the pages I want to post using WordPress. Changing domain in a bad way is dangerous. Put a page the tell the reader that the site is moved to a new domain is very unfriendly to the user and also
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Using “META” Tag in HMTL HEAD to Redirect Pages
Posted onIt is quite simple to redirect pages using the “meta” tag in HTML head, I just give the example to redirect the page to https://www.systutorials.com after 1 second. <html> <head> <meta http-equiv=”Refresh” content=”1; url=https://www.systutorials.com/”> </head> <body> This page is redirected to: <a href=”https://www.systutorials.com/”>systutorials.com</a>.<br /> </body> </html>
Script: Shutting Down All Xen VMs on a Server
Posted onShutting down servers is a common operations for managing a cluster. However, if this server is configured to a Xen Dom0 and has Xen VMs (DomUs), the VMs should be shutdown first to avoid data lost on these VMs. xm supports a -a option to shutdown all VMs: # xm shutdown -a Add the -w
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How to install Scala on Linux
Posted onHow to install Scala on Fedora Linux How to install Scala on Fedora Linux: This tutorial introduces how to install Scala 2.9.2 on 64-bit Fedora Linux 17. There are some changes needed to make scala work on Fedora Linux 17. Please check it out in the answer. Continue reading: How to install Scala on Fedora
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Viewing XPS Files in Linux
Posted onXPS files is a format from MS on Windows. Evince can view some XPS files, but fails to view some. To view XPS files generated on Windows on a Linux system, we can use mupdf. It works very well. I like it much especially in the situation that Evince fails to open the XPS file.
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How to Generate and Apply Patches using diff and patch on Linux
Posted on`diff` and `patch` are tools to create patches and apply patches to source code, which is widely used in the open-source world, such as Linux kernel and application. patch: applying patches To apply a patch to a single file: $ patch < foo.patch If the foo.patch does not identify the file the patch should be
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Installing Fedora 17 PV Domain-U on Xen with PXE Booting
Posted onAn introduction to the general method of installing Domain-U on Xen is introduced here: Setting Up Stable Xen DomU with Fedora: Unmodified Fedora 12 on top of Xenified Fedora 12 Dom0 with Xen (this is a general introduction, some details are changed, such as ‘xl’ replacing ‘xm’, LVM backing the disk for higher performance. But
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How to Flush iptables on Fedora Linux
Posted oniptables is a mechanism in Linux kernel for port forwarding, NAT, firewalls etc. In Linux distros, such as Fedora, the iptables is configured to be as a “strict” firewall that opens a limited know ports, such as 22 for SSH. However, in some network environment, such as a private cluster, the nodes are trusted and
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How to Install Xen on Fedora as Domain-0 (Fedora 17)
Posted onThe new development of Xen and Linux kernel make it easy to install Xen on Fedora as the Domain-0 now. This post uses Fedora 17 as an example platform to introduce how to set up Domain-0 on Fedora Linux. Compared to our old method (https://www.systutorials.com/setting-up-stable-xen-dom0-with-fedora-xen-3-4-3-with-xenified-linux-kernel-2-6-32-13-in-fedora-12/) which requires manually compiled Xen and patched kernel, the current
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How to Install MS Office 2007 on Linux using Wine
Posted onAs a Linux user, I must keep a copy of Windows. One reason is that I should edit MS Office files, such as .doc, .ppt, .xls and .xml (office 2003 xml format) required by, created by or for other using Windows. Wine worked for me with Office 2003 ever but has this or that problem.
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How to Disable IPv6 on Linux
Posted onIPv6 is enabled by default on most Linux distros. However, IPv6 is not used for some situations for most of time and it may cause troubles and requires effort to protect the network and ensure the security. This post introduces how to disable IPv6 support on Linux (newer modern Kernel versions). First, add these lines
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