Linux how to copy but not overwrite? [closed]

Answer 1

Alpine linux: Below answer is only for case of single file: in alpine cp -n not working (and false | cp -i ... too) so solution working in my case that I found is:

if [ ! -f env.js ]; then cp env.example.js env.js; fi 

In above example if env.js file not exists then we copy env.example.js to env.js.