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# Standard devices

Incus provides each instance with the basic devices that are required for a standard POSIX system to work. These devices aren’t visible in the instance or profile configuration, and they may not be overridden.

The standard devices are:

Device | Type of device
--- | ---
`/dev/null` | Character device
`/dev/zero` | Character device
`/dev/full` | Character device
`/dev/console` | Character device
`/dev/tty` | Character device
`/dev/random` | Character device
`/dev/urandom` | Character device
`/dev/net/tun` | Character device
`/dev/fuse` | Character device
`lo` | Network interface

Any other devices must be defined in the instance configuration or in one of the profiles used by the instance. The default profile typically contains a network interface that becomes `eth0` in the instance.