 Remastered Linux, BSD and OpenSolaris operating system distributions are common because they are not copy protected, but also because of the allowance of such operating systems to grow an application for taking a "snapshot" of itself, and of installing that onto bootable media such as a thumb drive or a virtual machine in a hypervisor.Since 2001 over 1000 computer operating systems have arisen for download from the Internet.A global community of Linux providers pushes the practice of remastering by developer switching, project overtaking or merging, and by sharing over the Internet.