Update cheatsheets

dig

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# dig
+
+> DNS lookup utility.
+> More information: <https://manned.org/dig>.
+
+- Lookup the IP(s) associated with a hostname (A records):
+
+`dig +short {{example.com}}`
+
+- Get a detailed answer for a given domain (A records):
+
+`dig +noall +answer {{example.com}}`
+
+- Query a specific DNS record type associated with a given domain name:
+
+`dig +short {{example.com}} {{A|MX|TXT|CNAME|NS}}`
+
+- Specify an alternate DNS server to query:
+
+`dig @{{8.8.8.8}} {{example.com}}`
+
+- Perform a reverse DNS lookup on an IP address (PTR record):
+
+`dig -x {{8.8.8.8}}`
+
+- Find authoritative name servers for the zone and display SOA records:
+
+`dig +nssearch {{example.com}}`
+
+- Perform iterative queries and display the entire trace path to resolve a domain name:
+
+`dig +trace {{example.com}}`
+
+- Query a DNS server over a non-standard [p]ort using the TCP protocol:
+
+`dig +tcp -p {{port}} @{{dns_server_ip}} {{example.com}}`