In order to show the date and time in Linux, just run this.

$ date

The output will look something like this.

Fri Feb 25 14:39:34 UTC 2022

That’s all.

If you have a private RSA key but not its public key, you can generate the public key by running the following.

sh-keygen -y -f ~/.ssh/my-key.pem > ~/.ssh/my-key.pub