What is a full-stack PHP developer

[techlists at phpcoderusa.com]

Hi,

I have read that to be qualified as a full-stack developer, one must 
know how to troubleshoot the entire stack.

Where are the boundaries.  I assume this means being able to program in 
PHP, know enough Linux to troubleshoot the hosting and be able to 
identify and assess the associated logs, understand and be able to 
troubleshoot/fix/install Apache, Be able to install MySQL and write SQL 
and troubleshoot as may be necessary.  I'm thinking this includes log 
rotate and the ability to add/edit/remove users, and work with SSH users 
and permissions.  Included is file and directory permissions.  Add to 
this the skills to manage sudo users.

This does not include networking, understanding load, the ability to 
install and configure Linux (although I think it would be helpful).

I'm thinking LAMP/LEMP where Linux is limited to hosting.

Am I in the ball park?

Thank you for your feed back.