$ ssh -vvv -i ~/.ssh/id_dsa bitbucket.org
OpenSSH_6.6.1, OpenSSL 1.0.1f 6 Jan 2014
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug2: ssh_connect: needpriv 0
debug1: Connecting to bitbucket.org [131.103.20.167] port 22.
debug1: Connection established.
debug3: Incorrect RSA1 identifier
debug3: Could not load "/home/user/.ssh/id_dsa" as a RSA1 public key
debug1: identity file /home/user/.ssh/id_dsa type 2
debug1: identity file /home/user/.ssh/id_dsa-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.6.1p1 Ubuntu-2ubuntu2
^C

$