ssh-keygen - is used to generate a public/private authentication key pair

To generate ssh key without any arguments $ ssh-keygen

To define key type $ ssh-keygen -t rsa $ ssh-keygen -t dsa

To define bit size default is 2048 $ ssh-keygen -b 4096

To assign passphrase $ ssh-keygen -P "myp@ssword"

To change passphrase of the private key $ ssh-keygen -p

To create keys with custom filename $ ssh-keygen -f my-rsa-key

To add custom comment to the key $ ssh-keygen -C "This key is for my.server.in"

To change comment of the key $ ssh-keygen -c

To hash the content of known_hosts file $ ssh-keygen -H

To delete all the keys related to 192.168.122.101 host from known_hosts file $ ssh-keygen -R 192.168.122.101

regards, T.Dhanasekar