SSH

Convert SSH => OPENSSH

puttygen sshpriv.key -O private-openssh -o opensshpriv.key

Multiple identities

You can setup multiple ssh keys on your host by following config.

Bitbucket + Github

File ~/.ssh/config

Host github.com    User username    HostName github.com    IdentityFile ~/.ssh/rsa_github    IdentitiesOnly yesHost bitbucket.org    User username    HostName bitbucket.org    IdentityFile ~/.ssh/rsa_bitbucket    IdentitiesOnly yes

Multiple Bitbucket/Github

File ~/.ssh/config

Host personal.bitbucket.org    User username1    HostName personal.bitbucket.org    IdentityFile ~/.ssh/rsa_bitbucket1    IdentitiesOnly yesHost work.bitbucket.org    User username2    HostName work.bitbucket.org    IdentityFile ~/.ssh/rsa_bitbucket2    IdentitiesOnly yes

Bitbucket for example has a wildcard DNS.

$ host personal.bitbucket.orgpersonal.bitbucket.org is an alias for bitbucket.org.bitbucket.org has address 104.192.143.1bitbucket.org has address 104.192.143.2bitbucket.org has address 104.192.143.3

$ host work.bitbucket.orgwork.bitbucket.org is an alias for bitbucket.org.bitbucket.org has address 104.192.143.1bitbucket.org has address 104.192.143.3bitbucket.org has address 104.192.143.2

Github unfortunately does not have.