我已经完成ntpq，然后运行associations并收到以下内容：
ind assid status conf reach auth condition last_event cnt
===========================================================
1 12097 c811 yes none yes reject mobilize 1
从 (Peer Status) 的文档中man ntp-decode，我了解到第一位数字表示Status，第二位数字表示Select，第三位数字表示Count，第四位数字表示Code。
我尝试查找 Select Status该手册的相应部分并发现以下内容：
The Select Field displays the current selection status. (The T Field in the following table gives the corresponding tally codes used in the ntpq peers dis-
play.) The values are coded as follows:
+-------------------------+---------------------------------------+--------------------------+-------------------------------------------------------------+
| Code | Message | T | Description |
+-------------------------+---------------------------------------+--------------------------+-------------------------------------------------------------+
| 0 | sel_reject | | discarded as not valid (TEST10-TEST13) |
+-------------------------+---------------------------------------+--------------------------+-------------------------------------------------------------+
| 1 | sel_falsetick | x | discarded by intersection algorithm |
+-------------------------+---------------------------------------+--------------------------+-------------------------------------------------------------+
| 2 | sel_excess | . | discarded by table overflow (not used) |
+-------------------------+---------------------------------------+--------------------------+-------------------------------------------------------------+
| 3 | sel_outlyer | - | discarded by the cluster algorithm |
+-------------------------+---------------------------------------+--------------------------+-------------------------------------------------------------+
| 4 | sel_candidate | + | included by the combine algorithm |
+-------------------------+---------------------------------------+--------------------------+-------------------------------------------------------------+
| 5 | sel_backup | # | backup (more than tos maxclock sources) |
+-------------------------+---------------------------------------+--------------------------+-------------------------------------------------------------+
| 6 | sel_sys.peer | * | system peer |
+-------------------------+---------------------------------------+--------------------------+-------------------------------------------------------------+
| 7 | sel_pps.peer | o | PPS peer (when the prefer peer is valid) |
+-------------------------+---------------------------------------+--------------------------+-------------------------------------------------------------+
那么，这个8数字代表什么Select Status意思呢？
答案1
这文档中对同级状态代码的解释表示状态字段“为 5 位宽，并与 3 位宽的选择字段组合以创建对等状态字的第一个完整字节”。选择字段为 3 位，因此其值只能为 0-7。第二位数字中的 8 是状态字段中的最低有效位，而不是选择字段中的最高有效位。
因此c8意味着“持久关联”、“已启用身份验证”和“广播关联”（位 0、1 和 4，按大端计算）。您可以ntpq使用命令来解释这些字段。以下是我的笔记本电脑的一个示例，它配置为在模式下readvar使用：[0-3].ubuntu.pool.ntp.orgpool
# ntpq -n
ntpq> peers
remote refid st t when poll reach delay offset jitter
==============================================================================
0.ubuntu.pool.n .POOL. 16 p - 64 0 0.000 0.000 0.000
1.ubuntu.pool.n .POOL. 16 p - 64 0 0.000 0.000 0.000
...
ntpq> assoc
ind assid status conf reach auth condition last_event cnt
===========================================================
1 32962 8811 yes none none reject mobilize 1
2 32963 8811 yes none none reject mobilize 1
...
ntpq> readvar 32962
associd=32962 status=8811 conf, bcast, sel_reject, 1 event, mobilize,
srcadr=0.0.0.0, srcport=0, srchost="0.ubuntu.pool.ntp.org",
dstadr=0.0.0.0, dstport=0, leap=11, stratum=16, precision=-24,
rootdelay=0.000, rootdisp=0.000, refid=POOL,
reftime=00000000.00000000 Thu, Feb 7 2036 16:28:16.000,
...
请注意“conf”（永久配置关联）和“bcast”（广播关联），它们是状态字段的简短解释。（显然，当广播的 refid 为 POOL 时，它的含义不仅仅只是广播。）