ref. : https://www.suspend2.net/
1. Suspend2란?
Suspend 2 is most easily described as the Linux equivalent of Windows’ hibernate functionality. It saves the contents of memory to disk and powers down. When the computer is started up again, it reloads the contents and the user can continue from where they left off. No documents need to be reloaded or applications reopened and the process is much faster than a normal shutdown and start up.
Windows의 hibernate functionality와 유사함. disk와 memory contents를 저장하고, startup시 그 contents를 reload. [fast cold boot를 생가할 때, 고려해볼만한 가치가 있음]
