diff --git a/os/unix/network/dns/detect-dns-server.txt b/os/unix/network/dns/detect-dns-server.txt
new file mode 100644
index 000000000..898ed0320
--- /dev/null
+++ b/os/unix/network/dns/detect-dns-server.txt
@@ -0,0 +1,2 @@
+https://www.siteground.com/kb/flush-dns-cache-in-linux/
+    sudo lsof -i :53 -S
diff --git a/os/unix/network/dns/flush-caches.txt b/os/unix/network/dns/flush-caches.txt
new file mode 100644
index 000000000..f1f92614c
--- /dev/null
+++ b/os/unix/network/dns/flush-caches.txt
@@ -0,0 +1,6 @@
+https://www.siteground.com/kb/flush-dns-cache-in-linux/
+    sudo resolvectl statistics
+    sudo resolvectl flush-caches
+
+    sudo systemd-resolve --statistics
+    sudo systemd-resolve --flush-caches