I have a very simple use case, but somehow it's not working.
I have a user deploy who belongs to www-data group.
When I try to chmod 777 a file, which looks like below, I get a permission error.
www-data www-data 31 Jul 26 09:46 f1f839b7e0e635d46129a4c4073e76a9
How come I can't change permission when deploy belongs to the same group?
How can I allow deploy to chmod the file?