Linux myhost 4.1.12-103.7.1.el7uek.x86_64 #(host edited) Red Hat Enterprise Linux Server release 7.4 (Maipo) ntpd - NTP daemon program - Ver. 4.2.6p5 ntp-4.2.6p5-25.0.1.el7_3.2.x86_64 /etc/ntp.conf中：
driftfile /var/lib/ntp/drift restrict default nomodify notrap nopeer noquery restrict 127.0.0.1 restrict ::1 server someserver iburst #edited server someserver iburst #edited includefile /etc/ntp/crypto/pw keys /etc/ntp/keys disable monitor
ntp就像这样运行，所以没有弃用-I接口选项..：
ntp 25451 0.0 0.0 25676 4156 ? Ss 11:27 0:00 /usr/sbin/ntpd -u ntp:ntp -g
在启动时说：
/usr/sbin/ntpd -n -dd [...] Listen and drop on 0 v4wildcard 0.0.0.0 UDP 123 Listen and drop on 1 v6wildcard :: UDP 123 Listen normally on 2 lo 127.0.0.1 UDP 123 Listen normally on 6 vethr9d35e1373f fe80::70f4:4aff:fe83:7639 UDP 123 [...]
并且它也为每个接口描述了如下一行： create_interface(fe80::70f4:4aff:fe83:7639#123) ..但不是:: 1
/ etc / hosts：
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 172.27.30.10 hostname1 hostname2 172.27.30.10 hostname3 hostname4 172.27.30.10 hostname5 hostname6
现在跟随ntpq调用错误的第一个，然后在一个工作的服务器上：
strace ntpq -np |& grep -i conn connect(3, {sa_family=AF_LOCAL, sun_path="/var/run/nscd/socket"}, 110) = -1 ENOENT (No such file or directory) connect(3, {sa_family=AF_LOCAL, sun_path="/var/run/nscd/socket"}, 110) = -1 ENOENT (No such file or directory) connect(4, {sa_family=AF_LOCAL, sun_path="/var/run/nscd/socket"}, 110) = -1 ENOENT (No such file or directory) connect(3, {sa_family=AF_LOCAL, sun_path="/var/run/nscd/socket"}, 110) = -1 ENOENT (No such file or directory) 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 connect(3, {sa_family=AF_UNSPEC, sa_data="\0\0\0\0\0\0\0\0\0\0\0\0\0\0"}, 16) = 0 connect(3, {sa_family=AF_INET, sin_port=htons(123), sin_addr=inet_addr("127.0.0.1")}, 16) = 0 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
和ntpq -pn不起作用：
ntpq -pn ::1: timed out, nothing received ***Request timed out
在类似的服务器上，使用相同的/ etc / hosts，和/etc/ntp.conf相同的kernel / os / ntp版本，它有create_interface(::1#123) – 但不在我的服务器上。 任何指针/事情，非常感谢。
strace ntpq -np |& grep -i conn connect(3, {sa_family=AF_LOCAL, sun_path="/var/run/nscd/socket"}, 110) = -1 ENOENT (No such file or directory) connect(3, {sa_family=AF_LOCAL, sun_path="/var/run/nscd/socket"}, 110) = -1 ENOENT (No such file or directory) connect(4, {sa_family=AF_LOCAL, sun_path="/var/run/nscd/socket"}, 110) = -1 ENOENT (No such file or directory) connect(3, {sa_family=AF_LOCAL, sun_path="/var/run/nscd/socket"}, 110) = -1 ENOENT (No such file or directory) connect(3, {sa_family=AF_INET, sin_port=htons(123), sin_addr=inet_addr("127.0.0.1")}, 16) = 0 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 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 connect(4, {sa_family=AF_INET, sin_port=htons(123), sin_addr=inet_addr("127.0.0.1")}, 16) = 0 connect(4, {sa_family=AF_INET6, sin6_port=htons(123), inet_pton(AF_INET6, "::1", &sin6_addr), sin6_flowinfo=0, sin6_scope_id=0}, 28) = 0
和ntpq -pn WORKS