The -d @ command option accepts any resolvable file path, as long as the path actually exists. So you could use:
- a path relative to the current directory
- a fully qualified path
- a path with soft-links in it
- and so on
To wit, just the same as hundreds of other *Nix style commands. One quick note, the -d option will attempt to url encode your data, which from what you describe isn’t actually what you want. You should use the --data-binary option instead. Something like this:
curl -XPOST
-H 'Content-Type:application/json'
-H 'Accept: application/json'
--data-binary @/full/path/to/test.json
http://localhost:8080/easy/eservices/echo -v -s