What is the long ID shown when i run the image

General Discussions
1

[root@ip-172-31-43-77 ~]# docker run -d nginx
c26fd88b95c30851f14c50dfc54f02b35285c3b379784ecf47db7a89d91f1db3

what is this long value shown, when i run the image.
my trainer tells me that this is the digest?

2

This is the ID of the nginx container you just created