Topics related with administration
Usefull examples working on shell
Topics related to networking
Topics related to Embedded Linux (toolchains, build tools, flash and filesystems, etc.)
Questions about programming languages C, C++, Ruby, Python, Php, Bash etc.
Hardware installation, configuration and tunings
Topics related to specific Linux distributions
All about the services and daemons (web servers, proxy servers, samba, openldap, ssh, dns etc.)
Discussion about this site, its organization, how it works, and how we can improve it.
Questions and topics for Linux newbies
Installation types and problems
X configuration and topics about applications with Gui
Kernel compilation, tuning and debugging
Security topics and announcements
Database related issues (MySQL, PostgreSQL, MongoDB, Redis, etc.)