diff --git a/README.md b/README.md
index 72bf859..cb62123 100644
--- a/README.md
+++ b/README.md
@@ -4,6 +4,10 @@
 
 * Set tab to 4 spaces: `set tabstop=8 softtabstop=0 expandtab shiftwidth=4 smarttab`
 
+## Shell
+
+* Find my public IP: `dig +short myip.opendns.com @resolver1.opendns.com`
+
 
 References
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