How to Set Static IP on Ubuntu

To set the static IP address on Ubuntu, we want to first determine what network interfaces we currently have. These network interfaces represent the Infiniband or Ethernet ports on your computer. You will typically have an interface called eth0 or eth1 that allows you to connect to the Internet. Note, setting...

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Fixing 500 Internal Server Error for a PHP File

The 500 Internal Server Error, which you may be seeing on the web console, may occur because of a random PHP file. 500 Internal Server Error may happen because of faulty .htaccess configuration, PHP memory limit, or a slew of other random issues. I’ll show you how I normally debug...

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Setting Up Infiniband in Centos 6.7

Installing Infiniband Drivers In Centos/RHEL, software support for Mellanox infiniband hardware is found in the package group “Infiniband Support”, which can be installed with yum: $yum -y groupinstall “Infiniband Support” This will install the required kernel modules, and the infiniband subnet manager opensm. Several optional packages are also available that...

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Setup Hostname without DNS Server on CentOS 7

Let’s say that you have a cluster of 6 nodes and you do not have a DNS server. How do you map the IPs to their perspective hostnames properly so that every node in the cluster can detect the other node’s hostname? We need to bypass the automatic lookup. I...

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How to Install CentOS 6 Minimum Without Internet

When I first installed CentOS 6 minimum, I couldn’t figure out how to install the OS without internet connection, but eventually, I figured it out. The OS that I’m using is CentOS 6.7 minimum, and normally, you’d need Internet connection while installing the OS because you would select URL for...

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How to Mount USB Flash Drive on CentOS 7

In this blog article, I’ll show you how to mount a USB Flash Drive on CentOS 7 terminal. In my case, I needed to mount a USB Flash Drive on my minimal CentOS 7 machine to copy a file to the USB Flash Drive. USB Flash Drive The file system...

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