Linux for mobile devices, sometimes referred to as mobile Linux, is the usage of Linux-based operating systems on portable devices, whose primary or only Human interface device (HID) is a touchscreen. It mainly comprises smartphones and tablet computers, but also some mobile phones, personal digital assistants (PDAs) portable media players that come with a touchscreen separately.
Mobile Linux is a relatively recent addition to the Linux range of use, with Google's Android operating system pioneering the concept. While UBPorts tried to follow suit with Ubuntu Touch, a wider development of free Linux operating systems specifically for mobile devices was only really spurred in the latter 2010s, when various smaller companies started projects to develop open source phones.
This is a list of Linux distros directly targeted towards use with mobile phones, being offered preconfigured with the mobile-oriented software listed below. There are both phone producers who develop their own operating systems and independent developments by community projects. Outside of these, several traditional distros have versions compiled for ARM architecture, which could be configured to use these components. This is done, for example, with Manjaro by the PinePhone.
See also: Comparison of open-source mobile phones
Phones with Linux preinstalled: