Docker is an opensource tool used for virtualization and deliver software in the form of packages called Containers. It is one of the most important tools used in networking domain. Dockerfile is a template for building the image which contains commands needed to package the software. In this post, I am going to explain the commands ADD & COPY used in Dockerfile . ADD Command: ADD command is used to copy files, directories or files from remote URLS to destination path in the image. The source paths can contain wildcards. If the destination has relative path, it is relative to the Working directory of the image. Note that source path is always relative to the Docker build context. ADD command will not support authentication. So, if there are any protected files to be added in Dockerfile building, use other tools like curl or wget Dockerfile copying Single & Multiple files, directory using ADD inst...
Virtual interfaces are the interfaces that allows physical connection to have more than one interface. These help in tagging the LAN packet with ID’s that may be used to segregate the traffic or customer. This article focuses on the creation and removal of Virtual Interfaces using Open Source tool Vlan and command ip link in Linux Operating system. All the commands are prefixed with sudo to run commands as a root user Vlan : Vlan is an open source tool that helps in creating and removing the virtual interfaces over a physical interface. To use Vlan , one needs to install vlan using sudo apt-get install vlan on Linux Operating System Adding Virtual Interface using Vlan tool: Assume you have a physical interface named enp0s4. To create a Virtual Lan or Sub interface, the command is vconfig add < Physical_Interface_Name > < tag_number > . ...