Update cheatsheets

linux/ntpq

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# ntpq
+
+> Query the Network Time Protocol (NTP) daemon.
+> More information: <https://www.eecis.udel.edu/~mills/ntp/html/ntpq.html>.
+
+- Start `ntpq` in interactive mode:
+
+`ntpq --interactive`
+
+- Print a list of NTP peers:
+
+`ntpq --peers`
+
+- Print a list of NTP peers without resolving hostnames from IP addresses:
+
+`ntpq --numeric --peers`
+
+- Use `ntpq` in debugging mode:
+
+`ntpq --debug-level`
+
+- Print NTP system variables values:
+
+`ntpq --command={{rv}}`