@localhost ~]$ sudo ntpdate ru.pool.ntp.org
21 Nov 20:02:47 ntpdate[9998]: no server suitable for synchronization found
@localhost ~]$ sudo ntpdate 0.ru.pool.ntp.org
21 Nov 20:03:04 ntpdate[10001]: no server suitable for synchronization found
@localhost ~]$ sudo ntpdate 1.ru.pool.ntp.org
21 Nov 20:03:14 ntpdate[10004]: no server suitable for synchronization found
@localhost ~]$ sudo ntpdate 2.ru.pool.ntp.org
21 Nov 20:03:23 ntpdate[10007]: no server suitable for synchronization found
@localhost ~]$ sudo ntpdate 3.ru.pool.ntp.org
21 Nov 20:03:33 ntpdate[10010]: no server suitable for synchronization found
@localhost ~]$ sudo ntpdate ru.pool.ntp.org
21 Nov 20:02:47 ntpdate[9998]: no server suitable for synchronization found
@localhost ~]$ sudo ntpdate 0.ru.pool.ntp.org
21 Nov 20:03:04 ntpdate[10001]: no server suitable for synchronization found
@localhost ~]$ sudo ntpdate 1.ru.pool.ntp.org
21 Nov 20:03:14 ntpdate[10004]: no server suitable for synchronization found
@localhost ~]$ sudo ntpdate 2.ru.pool.ntp.org
21 Nov 20:03:23 ntpdate[10007]: no server suitable for synchronization found
@localhost ~]$ sudo ntpdate 3.ru.pool.ntp.org
21 Nov 20:03:33 ntpdate[10010]: no server suitable for synchronization found
А если с ключом -v, никаких полезных сообщений не появится?
[linux@localhost ~]$ sudo ntpdate -v ru.pool.ntp.org
29 Nov 16:18:06 ntpdate[7535]: ntpdate 4.2.2p4@1.1585 Sun Nov 26 13:45:58 UTC 2006 (1)
29 Nov 16:18:18 ntpdate[7535]: no server suitable for synchronization found
[linux@localhost ~]$