![]() We want to support cloned disk images, which is the easiest way to replicate many systems in a network emulation tool like GNS3. We want to run dCore in a virtual machine in a way that supports persistent configuration changes and is self-contained. Why not just boot dCore from an attached virtual optical drive? Why go through the trouble of installing it on a hard drive when it was designed to run from a CDROM or USB thumb drive? SCEs are similar to Tiny Core Linux TCZ extensions, with some additional features. dCore converts Debian or Ubuntu packages into usable SCEs (self-contained extensions). dCore Linux is a version of Tiny Core Linux so it also uses the concept of extensions to install new software. While dCore may import software from the Debian or Ubuntu repositories, it does not install software in the same way the Debian or Ubuntu installs software. ![]() dCore works in a similar way, but the commands used are different. I discussed the topic of Tiny Core Linux persistent configuration changes in a previous post. You must understand how to save configuration changes in dCore. Since dCore loads the entire Linux system into RAM, changes to the filesystem - such as installing new software or updating configuration files - will be lost if the system is restarted. When using dCore, it is important to understand how the dCore filesystem works. dCore Linux provides the functionality of Tiny Core Linux but also makes it easier to use the latest versions of networking software because it is designed to use the Debian software repositories. I use VirtualBox in this example, but any other virtual machine manager would also be suitable.īecause dCore Linux is a small, lightweight Linux operating system, it is suitable for use in network emulators that use a full virtualization stack such as Qemu/KVM or VirtualBox. This post lists a detailed procedure to install dCore Linux on a virtual disk image connected to a virtual machine. Currently available instructions for installing dCore Linux onto a hard drive are incomplete and hard to follow. This should simplify the process of building network appliances for use in a network emulator, as you will not need to compile and build your own extensions, or use out-of-date pre-built extensions.ĭCore Linux is designed to run as a “live” Linux system from removable media such as a CD or a USB drive but, for my use, I need to install it on a hard drive. Like Tiny Core Linux, dCore loads its file system entirely into RAM, which should provide good performance in large network emulation scenarios running on a single host computer.ĭCore Linux allows users to install additional software from the Debian or Ubuntu repositories, instead of using the pre-built (and often out-of-date) TCE extensions provided for Tiny Core Linux. DCore Linux is a minimal Linux system based on the Tiny Core Linux system.
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