Linux containers have evolved from initial ideas in 1999 to widespread use today. Early container technologies included Virtuozzo in 1999-2000 and the introduction of namespaces in 2000-2001. The Linux-VServer project in 2001 helped advance containers. Checkpointing and live migration were implemented in 2002-2003. OpenVZ in 2005 helped popularize containers. Developments from 2006-2010 included n