Connect to Oracle Cloud VM with SSH Public-Private Key Pair

https://docs.cloud.oracle.com/iaas/Content/Compute/Tasks/managingkeypairs.htm
https://docs.cloud.oracle.com/iaas/Content/Compute/Tasks/accessinginstance.htm

• Generate a local private and public keyfile on the client machine

$ ssh-keygen -o

$ cd .ssh/

$ ls -ltrh

total 12K

-rw-------. 1 opc opc  409 Jan 11 07:05 authorized_keys

-rw-r--r--. 1 opc opc  399 Jan 11 07:19 id_rsa.pub

-rw-------. 1 opc opc 1.8K Jan 11 07:19 id_rsa

$ chmod 400 id_rsa

$ ls -ltrh

total 12K

-rw-------. 1 opc opc  409 Jan 11 07:05 authorized_keys

-rw-r--r--. 1 opc opc  399 Jan 11 07:19 id_rsa.pub

-r--------. 1 opc opc 1.8K Jan 11 07:19 id_rsa

• Upload ‘id_rsa.pub’ file while creating the instance or paste the ssh keys by pasting contents of public key file
  $ cat id_rsa.pub
• Connect to the VM from your client machine by using the private key file in .ssh/ directory

ssh -i ~/.ssh/id_rsa opc@10.0.2.3