diff --git a/linux/linux_general.txt b/linux/linux_general.txt
index abc9043..e059c0a 100755
--- a/linux/linux_general.txt
+++ b/linux/linux_general.txt
@@ -1,2 +1,6 @@
 wifi:
 https://raspberrypi.stackexchange.com/questions/109425/ubuntu-server-18-wifi-hotspot-setup
+
+permissions filter:
+directory - find ./ -type d -exec chmod 775 {} \;
+file - find ./ -type f -exec chmod 755 {} \;