update docs

hong539 · Aug 12, 2024 · 1337c81 · 1337c81
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diff --git a/docs/cloud/AWS.md b/docs/cloud/AWS.md
@@ -2,4 +2,6 @@
 
 ## Guides/Tips
 
-* [Tutorial for adding a new Prometheus scrape target: Redis on Amazon EKS and Kubernetes clusters](https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/ContainerInsights-Prometheus-Setup-redis-eks.html)
+* [Tutorial for adding a new Prometheus scrape target: Redis on Amazon EKS and Kubernetes clusters](https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/ContainerInsights-Prometheus-Setup-redis-eks.html)
+* [VPC/subnet-sizing-ipv4](https://docs.aws.amazon.com/vpc/latest/userguide/subnet-sizing.html#subnet-sizing-ipv4)
+* [VPC/Amazon DNS server](https://docs.aws.amazon.com/vpc/latest/userguide/AmazonDNS-concepts.html#AmazonDNS)
diff --git a/docs/network/dns/dns.md b/docs/network/dns/dns.md
@@ -5,4 +5,18 @@
 * [Building a DNS server in Rust](https://github.com/EmilHernvall/dnsguide)
 * DNS sinkhole
     * [AdGuardHome](https://github.com/AdguardTeam/AdGuardHome)
-    * [pi-hole](https://github.com/pi-hole)
+    * [pi-hole](https://github.com/pi-hole)
+
+## DNS CLI tools
+
+```
+nslookup google.com
+
+dig +short NS @resolver
+
+dig +nssearch google.com
+
+cat /etc/resolv.conf
+
+systemd-resolve --status | grep "DNS Servers"
+```