Update cheatsheets

linux/resolvectl

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# resolvectl
+
+> Resolve domain names, IPv4 and IPv6 addresses, DNS resource records, and services.
+> Introspect and reconfigure the DNS resolver.
+> More information: <https://www.freedesktop.org/software/systemd/man/resolvectl.html>.
+
+- Show DNS settings:
+
+`resolvectl status`
+
+- Resolve the IPv4 and IPv6 addresses for one or more domains:
+
+`resolvectl query {{domain1 domain2 ...}}`
+
+- Retrieve the domain of a specified IP address:
+
+`resolvectl query {{ip_address}}`
+
+- Flush all local DNS caches:
+
+`resolvectl flush-caches`
+
+- Display DNS statistics (transactions, cache, and DNSSEC verdicts):
+
+`resolvectl statistics`
+
+- Retrieve an MX record of a domain:
+
+`resolvectl --legend={{no}} --type={{MX}} query {{domain}}`
+
+- Resolve an SRV record, for example _xmpp-server._tcp gmail.com:
+
+`resolvectl service _{{service}}._{{protocol}} {{name}}`
+
+- Retrieve a TLS key:
+
+`resolvectl tlsa tcp {{domain}}:443`