The following libraries help you when you target the Linux Platform.
- POSIX.5 binding. It will let you perform Linux system calls in the POSIX subset.
- text terminal library.
- ncurses-based library for the Linux console.
- GUI library (actually multiplatform).
Ada Reference Manual
-- does not apply --
- The Big Online Book of Linux Ada Programming
- Ada in Debian GNU/Linux, slides suitable for a 50minute presentation, by Ludovic Brenta.