defaults to generating an RSA key for use by protocols 1.3 and 1.5;
specifying the
.Fl t
-allows you to create a key for use by protocol 2.0.
+option allows you to create a key for use by protocol 2.0.
.Pp
Normally each user wishing to use SSH
with RSA or DSA authentication runs this once to create the authentication
appended.
The program also asks for a passphrase.
The passphrase may be empty to indicate no passphrase
-(host keys must have empty passphrase), or it may be a string of
+(host keys must have an empty passphrase), or it may be a string of
arbitrary length.
Good passphrases are 10-30 characters long and are
not simple sentences or otherwise easily guessable (English