dnstracer: add page (#8707)

* add dnstracer command

* mark parameters correctly

Thanks @CleanMachine1, totally missed that one. Should obviously be in brackets.

Co-authored-by: CleanMachine1 <78213164+CleanMachine1@users.noreply.github.com>

* link man page for reference

Co-authored-by: Reinhart Previano Koentjoro <reinhart_previano@yahoo.com>

* Mark -o in example description

Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>

* Mark -r in example description

Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>

* Mark -o in example description

Accidentally put this for -s as well

Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>

* Revert -r mnemonic because not applicable

Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>

Co-authored-by: CleanMachine1 <78213164+CleanMachine1@users.noreply.github.com>
Co-authored-by: Reinhart Previano Koentjoro <reinhart_previano@yahoo.com>
Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>

pages/linux/dnstracer.md

@@ -0,0 +1,28 @@
+# dnstracer
+
+> The dnstracer command determines where a DNS gets its information from.
+> More information: <https://manned.org/dnstracer>.
+
+- Find out where your local DNS got the information on www.example.com:
+
+`dnstracer {{www.example.com}}`
+
+- Start with a [s]pecific DNS that you already know:
+
+`dnstracer -s {{dns.example.org}} {{www.example.com}}`
+
+- Only query IPv4 servers:
+
+`dnstracer -4 {{www.example.com}}`
+
+- Retry each request 5 times on failure:
+
+`dnstracer -r {{5}} {{www.example.com}}`
+
+- Display all steps during execution:
+
+`dnstracer -v {{www.example.com}}`
+
+- Display an [o]verview of all received answers after execution:
+
+`dnstracer -o {{www.example.com}}`