Update 'README.md'

README.md

@@ -19,4 +19,15 @@ My cheat sheet for commands I have trouble remembering.
 ```gs -dNOPAUSE -sDEVICE=pdfwrite -sOUTPUTFILE=mergedfile.pdf -dBATCH file1.pdf file2.pdf```
 
 #### ImageMagick
-```convert file1.pdf[0-1] file2.pdf mergedfile.pdf```
+```convert file1.pdf[0-1] file2.pdf mergedfile.pdf```
+
+## UFW
+### Examples
+
+```
+ufw status numbered
+ufw delete 2
+ufw allow from 192.168.1.10 to any port 22 proto tcp
+ufw allow in on tailscal0 to interfaceip port 22 from otherdeviceip
+ufw reset
+```