The ssh-keygen is a toolkit for managing these keys.

View bubblebabble digest of Keys

ssh-keygen -f .ssh/id_rsa -B

Viewing Fingerprints

ssh-keygen -f .ssh/id_rsa -l
ssh-keygen -f .ssh/id_rsa.pub -l

Exporting in Various Formats

ssh-keygen -f .ssh/id_rsa -e -m X
ssh-keygen -f .ssh/id_rsa -e -m X
ssh-keygen -f .ssh/id_rsa -e -m X
ssh-keygen -f .ssh/id_rsa -e -m X

Importing from Varous Formats

ssh-keygen -f Download/id_rsa -i -m X
ssh-keygen -f Download/id_rsa.pub -i -m X
ssh-keygen -f Download/id_rsa2 -i -m X
ssh-keygen -f Download/id_rsa2.pub -i -m X