What is imapsync?
Imapsync is an IMAP transfers tool. The purpose of imapsync is to migrate IMAP accounts or to backup IMAP accounts. IMAP is one of the three current standard protocols to access mailboxes, the two other are POP3 and HTTP with webmails, webmails are often tied to an IMAP server. If you want to know more about imapsync follow the link
Screen is a full-screen window manager that multiplexes a physical terminal between several processes used in Unix and Linux like distro. Typically interactive shells. At least that’s what GNU says.
Let me explain a small scenario where we actually use it. Sometimes when you have a bad connection and your trying to install something in a VPS using ssh, you loose the connection in the middle of everything and there is no way of seeing the progress.
LXC otherwise knows as Linux container is an operating system level virtualization method for running multiple isolated Linux systems (containers) on a control host using a single Linux kernel.
So what are the advantages? and what can I use it for? These are the first questions which popped up in my head.
For the advantages part. its fast since it depends on the physical hardware. keeps the base OS clean.
I use LXC as a web server. and yes it is really good. for me its very reliable.