M README → README

@@ -305,6 +305,17 @@ 
                   BONUS SECTION! :3 :3 <3 :3
           common config management patterns in zoa
 
+### define a reusable function
+in zoa, this is easy - just define a shell
+function:
+die() {
+  printf "%s.\n" "$1"
+  exit 1
+}
+
+every sub-script that is called will automatically
+have access to it. env vars work the same way.
+
 ### install a package
 
 (this is distro dependent)
@@ -317,7 +328,7 @@ if [ "$OS_RELEASE_ID" = "debian" ]; then
   apt install -y cowsay
 fi
   
-### place sshd_config, and reload ssh when it changes
+### place sshd_config, set permissions, and reload ssh when it changes
 
 zoa-file sshd /etc/ssh/sshd_config systemctl restart sshd
 chown root:root /etc/ssh/sshd_config