diff --git a/tbsetup/console_setup.in b/tbsetup/console_setup.in
index f63d6eaede50e66689e787f37c1f70b30204a366..3dee42b0f246db67bb1fe8c1b71c5d8c572beb7e 100755
--- a/tbsetup/console_setup.in
+++ b/tbsetup/console_setup.in
@@ -11,7 +11,7 @@ use English;
 my $TB		= "@prefix@";
 my $DBNAME	= "@TBDBNAME@";
 
-my $SSH		= "sshtb -q -l root plastic.emulab.net";
+my $SSH		= "sshtb -n -q -l root plastic.emulab.net";
 my $PROG	= "$TB/sbin/console_setup.proxy";
 my $TBPID	= "flux";
 my $dbg		= 1;
diff --git a/tbsetup/os_load.in b/tbsetup/os_load.in
index a866a42316b5504fe50797bb47f5eb635d064fb9..5689304ae022571600b3947e8d7e006f64c805e9 100755
--- a/tbsetup/os_load.in
+++ b/tbsetup/os_load.in
@@ -32,8 +32,8 @@ use English;
 my $TB		= "@prefix@";
 my $DBNAME	= "@TBDBNAME@";
 
-my $rsh		= "sshtb -q";
-my $ssh		= "sshtb -q";
+my $rsh		= "sshtb -n -q";
+my $ssh		= "sshtb -n -q";
 my $NETDISK     = "/tftpboot/netdisk";
 my $PAPERADDR	= "boss.emulab.net";
 my $PLASTICADDR	= "users.emulab.net";
diff --git a/tbsetup/os_setup.in b/tbsetup/os_setup.in
index ddd524f0d42cc50e94f846a456d121aa8b0f5b8d..e8f263dea055c4e3fd02114817616e701b2fa9e1 100755
--- a/tbsetup/os_setup.in
+++ b/tbsetup/os_setup.in
@@ -24,7 +24,7 @@ use English;
 my $TB		= "@prefix@";
 my $DBNAME	= "@TBDBNAME@";
 
-my $ssh		= "ssh -q";
+my $ssh		= "ssh -n -q";
 my $power	= "$TB/bin/power";
 my $ping	= "/sbin/ping";
 my $mail        = "/usr/bin/mail";
diff --git a/tbsetup/sched_reload.in b/tbsetup/sched_reload.in
index 987196f4a392846cb443c8e956ccc2ad6b6570b2..2fbc5acb9b7499dd76a28de544f2ad18f5d2d0c4 100755
--- a/tbsetup/sched_reload.in
+++ b/tbsetup/sched_reload.in
@@ -23,8 +23,8 @@ use English;
 my $TB     = "@prefix@/bin";
 my $DBNAME = "@TBDBNAME@";
 
-my $rsh		= "sshtb -q";
-my $ssh		= "sshtb -q";
+my $rsh		= "sshtb -n -q";
+my $ssh		= "sshtb -n -q";
 my $NETDISK     = "/tftpboot/netdisk";
 my $power	= "$TB/power";
 my $osload      = "$TB/os_load";