$ dput ppa:~hikiko/lowgfx unity_7.5.0+16.10.20160606.1-0ubuntu4_source.changes 
Checking signature on .changes
gpg: WARNING: unsafe enclosing directory permissions on configuration file `/home/eleni/.gnupg/gpg.conf'
gpg: Signature made Παρ 17 Ιούν 2016 11:50:06 πμ EEST using RSA key ID 0097AB21
gpg: Good signature from "Eleni Maria Stea <elene.mst@gmail.com>"
Good signature on /data/canonical/staging/unity_7.5.0+16.10.20160606.1-0ubuntu4_source.changes.
Checking signature on .dsc
gpg: WARNING: unsafe enclosing directory permissions on configuration file `/home/eleni/.gnupg/gpg.conf'
gpg: Signature made Παρ 17 Ιούν 2016 11:50:01 πμ EEST using RSA key ID 0097AB21
gpg: Good signature from "Eleni Maria Stea <elene.mst@gmail.com>"
Good signature on /data/canonical/staging/unity_7.5.0+16.10.20160606.1-0ubuntu4.dsc.
Uploading to ppa (via ftp to ppa.launchpad.net):
  Uploading unity_7.5.0+16.10.20160606.1-0ubuntu4.dsc: done.
  Uploading unity_7.5.0+16.10.20160606.1-0ubuntu4.diff.gz: done.    
  Uploading unity_7.5.0+16.10.20160606.1-0ubuntu4_source.changes: done.
Successfully uploaded packages.