use Net::OpenSSH;
use warnings;

my $path = "/export/home/tenfold2/.ssh/";

  $Net::OpenSSH::debug |= 16;
  my $t =  Net::OpenSSH->new('ildep@sxm0019', master_opts => [-o => "UserKnownHostsFile=/dev/null", -o => "StrictHostKeyChecking=no"], timeout => 10, ctl_dir => $path);
  $t->error and SendMail "unable to connect to remote host: ". $t->error;
  my $cmd = "ls -l";

##</code><code>##

x  Connecting to sxm0019
command-line: line 0: Bad configuration option: ServerAliveInterval
unable to connect to remote host: unable to establish master SSH connection: master process exited unexpectedly

##</code><code>##

/tmp/ssh.out:
debug2: we did not send a packet, disable method
debug3: authmethod_lookup publickey
debug3: remaining preferred: keyboard-interactive,password
debug3: authmethod_is_enabled publickey
debug1: Next authentication method: publickey
debug1: Trying private key: /export/home/tenfold2/.ssh/identity
debug3: no such identity: /export/home/tenfold2/.ssh/identity
debug1: Trying public key: /export/home/tenfold2/.ssh/id_rsa
debug3: send_pubkey_test
debug2: we sent a publickey packet, wait for reply
debug1: Server accepts key: xx hint 1
debug2: input_userauth_pk_ok: xx
debug3: sign_and_send_pubkey
debug1: read PEM private key done: type RSA
debug1: Authentication succeeded (publickey)
debug1: fd 6 setting O_NONBLOCK
debug2: fd 7 is O_NONBLOCK
debug1: channel 0: new [client-session]
debug3: ssh_session2_open: channel_new: 0
debug1: send channel open 0
debug1: Entering interactive session.
debug2: callback start
debug1: ssh_session2_setup: id 0
debug1: Sending command: echo hello world
debug1: channel request 0: exec
debug2: callback done
debug1: channel 0: open confirm rwindow 0 rmax 32768
debug2: channel 0: rcvd adjust 198560
debug1: channel 0: rcvd eof
debug1: channel 0: output open -> drain
debug1: client_input_channel_req: channel 0 rtype exit-status reply 0
debug1: channel 0: rcvd close
debug1: channel 0: close_read
debug1: channel 0: input open -> closed
debug3: channel 0: will not send data after close
hello world
debug3: channel 0: will not send data after close
debug1: channel 0: obuf empty
debug1: channel 0: close_write
debug1: channel 0: output drain -> closed
debug1: channel 0: almost dead
debug1: channel 0: gc: notify user
debug1: channel 0: gc: user detached
debug1: channel 0: send close
debug1: channel 0: is dead
debug1: channel 0: garbage collecting
debug1: channel_free: channel 0: client-session, nchannels 1
debug3: channel_free: status: The following connections are open:
  #0 client-session (t4 r0 i3/0 o3/0 fd -1/-1)

debug3: channel_close_fds: channel 0: r -1 w -1 e 7
debug1: fd 1 clearing O_NONBLOCK
debug2: fd 2 is not O_NONBLOCK
debug1: Transferred: stdin 0, stdout 0, stderr 0 bytes in 0.1 seconds
debug1: Bytes per second: stdin 0.0, stdout 0.0, stderr 0.0
debug1: Exit status 0
rc: 0