my %params = ( "protocol" => '2', "use_pty" => 0, "options" => ["stricthostkeychecking no"], "identity_files" => ["client_key","client_key.pub"], "debug" => 1, ); $ssh = Net::SSH::Perl->new($server, %params);# debug=>1, identity_files=>\@KEYFILE); $ssh->login();