# Customization

Using the shell (see shell), the installation process can be carefully customized, to fit exceptional use cases:

## Installing an alternative init system

&debian; uses systemd as its default init system. However, other init systems (such as sysvinit and OpenRC) are supported, and the easiest time to select an alternative init system is during the installation process. For detailed instructions on how to do so, please see the Init page on the Debian wiki.