The difference between. o files under Linux,. A files,. so files

Recently developed code in the Unbuntu environment, since very little use of the Linux development environment, so there is less knowledge of Linux compilation, about. O,. A,. So files and executables have been very confused

Today I looked into the distinction between them:

. O is equivalent to the obj file in Windows, A. C or. cpp file corresponds to an. o file
. A is a good number of. O Together for static connections, i.e., static mode, multiple. A can be chained to an EXE executable file
. So is a shared object that is used for dynamically connected, similar to Windows DLLs, and is loaded only when used.

The difference between. o files under Linux,. A files,. so files