Hi. I create a ubuntu 16.04 server with ispconfig3 following the perfect server guide. Everyting is ok. Im working with dynamic ip, and i use dnsexit, i think is the best dynamic dns service. All is working well. I also setup a script to update ispconfig ip's ipupdater.sch.my Only problem i have is my /etc/hosts.. in here, my ip is local--> 192.168.1.2 and i need the external ip instead. I need to create a bash script and then setup a crontab -e to execute it every 3 minutes. If i execute something like this: dig +short myip.opendns.com @resolver1.opendns.com i get my external ip, but now i need to echo to --> /etc/hosts including my fqdn. If someone can help... Thanks and sorry my english.