strace ntpq -p


open("/etc/gai.conf", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=2584, ...}) = 0
fstat(3, {st_mode=S_IFREG|0644, st_size=2584, ...}) = 0
read(3, "# Configuration for getaddrinfo("..., 4096) = 2584
read(3, "", 4096)                       = 0
close(3)                                = 0
futex(0x7f9367b5aee4, FUTEX_WAKE_PRIVATE, 2147483647) = 0
socket(PF_INET, SOCK_DGRAM, IPPROTO_IP) = 3
connect(3, {sa_family=AF_INET, sin_port=htons(123), sin_addr=inet_addr("127.0.0.1")}, 16) = 0
getsockname(3, {sa_family=AF_INET, sin_port=htons(57437), sin_addr=inet_addr("127.0.0.1")}, [16]) = 0
close(3)                                = 0
socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP) = 3
connect(3, {sa_family=AF_INET6, sin6_port=htons(123), inet_pton(AF_INET6, "::1", &sin6_addr), sin6_flowinfo=0, sin6_scope_id=0}, 28) = 0
getsockname(3, {sa_family=AF_INET6, sin6_port=htons(33586), inet_pton(AF_INET6, "::1", &sin6_addr), sin6_flowinfo=0, sin6_scope_id=0}, [28]) = 0
close(3)                                = 0
socket(PF_INET6, SOCK_DGRAM, IPPROTO_UDP) = 3
connect(3, {sa_family=AF_INET6, sin6_port=htons(123), inet_pton(AF_INET6, "::1", &sin6_addr), sin6_flowinfo=0, sin6_scope_id=0}, 28) = 0
sendto(3, "\26\1\0\1\0\0\0\0\0\0\0\0", 12, 0, NULL, 0) = 12
select(4, [3], NULL, NULL, {5, 0})      = 1 (in [3], left {4, 999998})
recvfrom(3, 0x7ffc71033d90, 516, 0, NULL, NULL) = -1 ECONNREFUSED (Connection refused)
write(2, "ntpq: ", 6ntpq: )                   = 6
write(2, "read", 4read)                     = 4
write(2, ": Connection refused", 20: Connection refused)    = 20
exit_group(0)                           = ?
+++ exited with 0 +++