There is a project, for its development has been paid. When discussing the scope of work with the developer, a scandal occurred. The developer shits a little on the server: for example, stops the web server (apache2) and users "do not see" the site. I changed the root password and the root password from mysql. But the developer used git to work with the code on the server. And these git-folders, files remained. Can he through them
a) Find out the current contents of files with code on the server (for example, a configuration file with database parameters)
b) Upload changes to the server without access to root or another account?
c) How else to damage the project?
And how to fix if the answers are yes.
Thank!
gitbut you do not mention that he has access to the server? - username