Unable to locate package php5-curl [duplicate]
In Ubuntu 16.04 default PHP version is 7.0, if you want to use different version then you need to install PHP package according to PHP version:
1-> PHP 7.0: sudo apt-get install php7.0-curl2-> PHP 7.1: sudo apt-get install php7.1-curl3-> PHP 7.2: sudo apt-get install php7.2-curl4-> PHP 5.5: sudo apt-get install php5.5-curl5-> PHP 5.6: sudo apt-get install php5.6-curl