When working with an eCommerce platform for a client, the client came up with the request of snow falling effect on the slider in HomePage to showcase the stores Christmas celebrations. Started to look out for solutions on how best and easy we can implement the same with less time…

All of a sudden I was not able to generate graphical charts in Request Tracker, which was working earlier! The RT log file reads as below: [debug]: You’ve enabled GD, but we couldn’t load the module: Can’t locate GD.pm in @INC (@INC contains: /opt/rt3/bin/../local/lib /opt/rt3/local/plugins/RT-Extension-ResetPassword/lib /opt/rt3/bin/../lib /usr/lib64/perl5/site_perl/5.8.8/x86_64-linux-thread-multi /usr/lib/perl5/site_perl/5.8.8 /usr/lib/perl5/site_perl /usr/lib64/perl5/vendor_perl/5.8.8/x86_64-linux-thread-multi…

I Installed MySQL server (MariaDB 8.0) on my CentOS 7 using yum. Once started the service and when I tried connecting to the database, I got the below error: # mysql -u root ERROR 1045 (28000): Access denied for user ‘root’@’localhost’ (using password: NO) MySQL version is as below: #…

I recently purchased EduExpression WordPress plugin for a client to setup an examination software. I was able to install and configure the plugin without much problem. However, the problem started occurring when the student login was accessed – the plugin page went blank when the student attempted to take an exam….

I recently purchased an examination software plugin called EduExpression for WordPress. However, I got the below error while setting up the plugin. PHP Fatal error: Call to undefined function bcmod() How to fix Call to undefined function bcmod In this tutorial, I’ll explain how to fix Call to undefined function bcmod()…

While migrating a client website from one WHM/cPanel to another WHM/cPanel, I got an SQL error “Incompatible with sql_mode=only_full_group_by“. Below is the complete error message. SELECT list is not in GROUP BY clause and contains nonaggregated column ‘dbname.p.picfile’ which is not functionally dependent on columns in GROUP BY clause; this…

OpenCA service can be started using the SysVinit script located inside openca/etc/init.d folder. However, the script has to be started manually after every system reboot (otherwise, the script could have been scheduled as cron job!). How about adding the script to Systemd so that it can start automatically when the…

While working with Divi FullWidth Slider module in one of my client’s website, the slider image (put as background image) were getting cut off when viewed in devices with varied resolution! Tried a lot of options by adjusting height, changing background image position etc., but nothing worked. In this tutorial,…

SVG an XML-based vector image which is commonly used in websites to display logos and icons. They are popular among developers and designers, because of its scalablility, smaller in file size and don’t pixelate on retina screens. By default, WordPress doesn’t allow you to upload the SVG file format due…

I encountered an error “Sub-Process /usr/bin/dpkg returned an error code (1)” while installing a Single sign-on package called Gluu Server. Below is the snapshot of the error. # apt-get install gluu-server-3.1.3 Reading package lists… Done Building dependency tree Reading state information… Done The following NEW packages will be installed: gluu-server-3.1.3…

While developing a monitoring tool, one of my colleague came up with the above question. He wanted to print the first n lines or last n lines output of the below command: $ systemctl -a –type=service How to print First n lines from the output of a shell command To…

One of my colleague came up with a query – How to Delete First/Last ‘n’ lines from the output of a command in Shell? For example, he wanted to trim down all the unnecessary lines from the output of a command – systemctl and print only the necessary lines. The command…

One of my client asked me to update DNS entry of his domain at Namecheap. After updating DNS, I checked DNS propagation at WhatsMyDNS. I know DNS takes time to propagate and sometimes it can happen quickly as well. But even after waiting for hours, the DNS was not propagated…

I was recently working on a portfolio design for a client. The requirement was quite challenging that I have never designed before. The client wants me to create an animation when a mouse hovered over an image. For example, when the visitor hovers mouse over the image, the forklift has…

Hi folks, I’m in a middle of designing a portfolio section for one of my client. The requirement was to perform an animation while hovering on the image. For e.g., imagine a forklift machine lifting an object when the mouse hovered on the image. To do that, I need to…

Before we talk about the error and its solution, here’s my OpenCA setup – It’s an offline Certificate Authority. i.e., RA (online registration authority that includes RA & NODE) and CA (offline certificate authority that includes CA & NODE) setup is installed different machines. It means, RA and CA communicates…

After installing OpenCA and setting up Certificate Authority (CA), I encountered an error – “Signature verification failed on SPKAC public key” while signing the end-entity certificate request on CA machine. Error while issuing Certificate to David (filename: /home/openca/var/openca/tmp/4229D72DA1BA34B416B9.req). OpenCA::OpenSSL returns errocode 7731075 (OpenCA::OpenSSL->issueCert: OpenSSL fails (7777067). Using configuration from /home/openca/etc/openca/openssl/openssl/User.conf…

Once the OpenCA is installed and the CA Certificate is issued, clicking serial number of the CA Certificate throws below error. Error Code: 6295020 [initServer:314] Cannot load certificate 404576247583593287078701 from the database. In-spite of enabling debug option, I couldn’t find any relevant error messages in stderror.log. The interface lists CA certificate, but…

Installing and configuring OpenCA is not that easy – lots of configuration files, templates, XML files, messy directory structures and outdated documentation. So there are chances that you will end up with lot of errors. That’s the reason, I had written plenty of tutorials on OpenCA and its issues. What makes…