Upload logo from admin panel from given below path (for magento 2.1.0 version):-

Content -> Design -> Configuration -> applied-theme -> Header

And you can upload your logo image here.

• save and clear cache.

Upload logo from admin panel from given below path (for magento 2.1.0 version):-

Content -> Design -> Configuration -> applied-theme -> Header - > Logo Image

And you can upload your logo image here jpg/png/gif format.

• save and clear cache.

php bin/magento c:f

Upload logo from admin panel from given below path:-

Content -> Design -> Configuration -> applied-theme -> Header

And you can upload your logo image here.

• save and clear cache.

Upload logo from admin panel from given below path (for magento 2.1.0 version):-

Content -> Design -> Configuration -> applied-theme -> Header

And you can upload your logo image here.

• save and clear cache.