How to update the Kernel in CentOS / Red Hat

Updating Kernel on the Linux system is essential. On most server, by default Kernel is excluded from automatic operating system and you have to schedule Kernel upgraded. Updating Kernel on CentOS / Red Hat server is as easy and you just need to execute the following command: yum -y update kernel In the above command, […]

How to access IPv6 URL directly from browser

IPv6 is now being adopted by most of the provider and most of the hosting providers and service providers are now offering IPv6. With IPv4, we can directly access any web server’s URL as follow: But with IPv6, we cannot access it directly. We have to put [ and ] in the URL as […]

How to set or change Hostname in Linux

In Linux, it is not difficult to change the hostname. In Linux, you can change hostname using hostname command. If you execute hostname command without any parameter, it will display current hostname. If you want to change or set hostname of your Linux system, simply run: # hostname new-hostname The above command will change the […]

WHMCS Cancel PayPal Subscription Not Working

WHMCS is a leading web hosting automation system. Using WHMCS, we can manage billing as well as support system using it. As of WHMCS Version 6.0, a new feature is added PayPal Subscription Automation. A new option has been added under Setup > General Settings > Invoices tab called Automatic Subscription Management. Once enabled, WHMCS […]

SSL certificate problem: unable to get local issuer certificate

While installing WordPress plugin or upgrading WordPress from your WordPress admin area, you may receive an error related to SSL certificate. You may receive following error or similar error message in your WordPress admin area: Download failed.: SSL certificate problem: unable to get local issuer certificate There could be many reasons for such error but […]