On all Linux-based systems, PATH is the name of a crucial environment variable which is used by shell to look for executable files before running any command. The PATH variable contains a list of directories where different system and user-based programs are available. This variable sometimes needs to be updated ... Read More

In any Linux terminal, you usually get a prompt to type commands and get their outputs. For some commands and scripts, you may need inputs which are usually provided by the user by typing on the terminal. For normal commands or text inputs, we can see whatever is typed on ... Read More

DNS is the backbone of modern Internet infrastructure. DNS stands for Domain Name System which is a system that translates domain names into IP addresses. There are different types of DNS queries and hierarchy of DNS servers that resolve DNS queries. Like any query, DNS queries also introduces some latency ... Read More

The sudo command in Linux / Unix based systems allows a trusted user to execute a command with extended privileges, either as superuser (root) or as another user defined in the security policy. The security policy determines the privileges assigned to a user as well. It may require that the ... Read More

Python is a powerful, open-source and easy to learn programming language. It is one of the most popular modern programming languages with a huge community of developers and extensive documentation. It usually comes pre-installed on all latest Linux systems as it is one of the building blocks of many operating ... Read More