How to

Read all posts Tagged for this section

Nginx Error: [::1]:80 failed: Address family not supported by protocol [Solved]

Question:  I have installed Nginx on a Ubuntu Xenial machine through apt-get.  However the service failed to start with an error message as "Address family not supported by protocol". Below is the complete nginx error message: -- Unit nginx.service has begun ...

How to install PHP 7.1 on GNU/Linux Debian 8.7 (jessie) server?

This tutorial will explain how to install PHP and its dependent packages on GNU Linux. If the Linux is installed with minimal packages,  then you need to install packages such as add-apt-repository, apt-transport-https, ca-certificates etc., as these packages will be used ...

Fix WordPress Posts 404 Error after changing Permalink!

Question: I changed the default permalink structure to postname, but now all the WordPress posts throw 404 not found error. However, the WordPress has updated .htaccess with necessary rules and below is the snapshot of it. # BEGIN WordPress <IfModule mod_rewrite.c> RewriteEngine On RewriteBase ...

OpenStack Fake Driver for Cloud Simulations [Tutorial]

OpenStack is a popular cloud operating system that allows you to control large amount of compute, storage and networking resources. It supports all popular Hypervisors such as KVM, Xen, VMware, HyperV etc...and this integration is made using compute drivers ...

OpenStack Compute Error – No compute node record for host [Solved]

OpenStack compute Error: Though the compute hosts had nova-compute service listening, those nodes were not displayed when 'nova hypervisor-list' command was executed. # nova hypervisor-list +----+----------------------------+-------+---------+ | ID | Hypervisor hostname | State | Status | +----+----------------------------+-------+---------+ But the command nova service-list didn't have any problem ...

Error in Sudoers file? Here’s how you can fix it.

It's quite common for an administrator to edit sudoers file and allow users to execute administrative commands. But what if you make an error? The sudo command is going to fail isn't? That's what exactly I did while installing ...

OpenStack VM Launch Error – Last exception: Binding failed for port [Solved]

Error:  "Exceeded maximum number of retries. Exceeded max scheduling attempts 3 for instance <instance_id>. Last exception: Binding failed for port. ucode: 500" while launching a VM in OpenStack Mitaka. If you are stuck with a similar issue, here's how you can solve ...

Disable annoying Ads on Android Lock screen

Do you see an advertisement banner on your Android lock screen? There are plenty of applications in Google Play that are supported by advertisements, but they display Ads within their app screen. However, certain application (such as Turbo Cleaner, Fast Cleaner, ...

Create Maven JAR in NetBeans IDE – Step by Step tutorial

It was my first Java project after several years of working with Linux and PHP. Fortunately, Maven with NetBeans saved my day. But what I felt was lacking with NetBeans is the ability to create Maven JAR file - yes, I ...

Date function in JavaScript creating Wrong month? [Solved]

Question: While using Date function in JavaScript, the month created is wrong. For example, for displaying the month of November, I pass '11' as an argument to the date function. But the result is December. Below is the function reference and ...

vps germany

MySQL Table Crash fix – marked as crashed and should be repaired?

One of the table in my MySQL database has been corrupted and the worst part of it is, the corrupted one was the sessions table - due to which the application was not able to store sessions for the users. Well, I ...

maven missing dependency jta-1.0.1B – Failure to find javax.transaction:jta:jar [Solved]

I got an error - maven missing dependency for jta-1.0.1b while building a CloudReports project in Netbeans IDE. The error hinted that it has failed to find javax.transaction:jta:jar in the maven repository. Below is the complete error message. An ...

What does this Error “Your connection is not Private. This website uses HSTS” mean and how to fix?

Once I had enabled HSTS (HTTP Strict Transport Security) for my https website powered by Cloudflare. But later on due to performance issue, I had to disable Cloudflare, so that the website is served directly from my VPS running Apache web ...

W3TotalCache Update Issue – Unable to upload media in WordPress [Solved]

Well, I updated W3TotalCache plugin from version 0.9.4.1 to 0.9.5 and ended up with an error "failed to open stream: No such file or directory. PHP Fatal error:  require(): Failed opening required" while uploading media in WordPress. Here's the complete error ...

How to Fix the Error “Invalid group when creating redirect” in Redirection WordPress plugin?

I have been using Redirection WordPress plugin for a while in my website. But the same plugin is not working on another website and displays an error "Invalid group when creating redirect". Can you help me to solve this error? ...

How to Configure virt-manager for Nested Virtualization Support?

Question: I have installed KVM hypervisor on my Debian Guest OS (basically a nested virtualization) which is hosted on a Ubuntu machine. However, when I run the kvm command, I get this error  - "Could not access KVM kernel module: No ...

How to Fix Error – qemu: could not load PC BIOS ‘bios.bin’?

Question: I have configured qemu-kvm on Ubuntu machine and got a qemu error - 'could not load PC BIOS bios.bin' while executing qemu-system-x86_64 command.  How to solve this error? Solution: QEMU-KVM will need a BIOS such as Seabios, vgabios, boschs etc... to start ...

msfconsole error after updating Metasploit Framework in Kali Linux [Solved]

Updating Metasploit is quite easy - you just need to run msfupdate command. Later, you might have to be prepared for series of errors while invoking msfconsole. For instance, I had to switch between various commands like bundle install, gem ...

  1. Pages:
  2. 1
  3. 2
  4. 3
  5. ...
  6. 94