Index: scripts/wifi_set_dns.sh
===================================================================
diff -u -r2e794456217865088c5eefc8ee470b68a1877921 -r0629dfe6bcc3e85047319284fa4c534efbf58594
--- scripts/wifi_set_dns.sh	(.../wifi_set_dns.sh)	(revision 2e794456217865088c5eefc8ee470b68a1877921)
+++ scripts/wifi_set_dns.sh	(.../wifi_set_dns.sh)	(revision 0629dfe6bcc3e85047319284fa4c534efbf58594)
@@ -1,8 +1,10 @@
 #!/bin/sh
 
-dns=8.8.8.8
-if [ $# -eq 1 ]; then
-    dns=$1
+if [ $# -eq 0 ]; then
+    currentFile=$(basename "$0")
+    echo "Usage: ./$currentFile <dns_ip>"
+    exit 0
 fi
 
+dns=$1
 echo "nameserver $dns" >> /etc/resolv.conf