# UNIX-specific issues

This section discusses Derby issues specifically related to UNIX platforms.

- Configuring file descriptors
  Derby databases create one file per table or index. Some operating systems limit the number of files an application can open at one time.
- Scripts
  Your installation contains executable script files that simplify invoking the Derby tools. On UNIX systems, these files might need to have their default protections set to include execute privilege.

Parent topic: After installing
Related concepts
The installation directory
Derby libraries and classpath