acountry: add page (#8611)

pages/linux/acountry.md

@@ -0,0 +1,16 @@
+# acountry
+
+> Print the country where an IPv4 address or hostname is located.
+> More information: <https://manned.org/acountry>.
+
+- Print the country where an IPv4 address or host is located:
+
+`acountry {{example.com}}`
+
+- Print extra [d]ebugging output:
+
+`acountry -d {{example.com}}`
+
+- Print more [v]erbose information:
+
+`acountry -v {{example.com}}`