what is Termux? a Linux emulator for android
Termux is a terminal emulator application enhanced with a large set of command line utilities ported to Android OS. The main goal is to bring the Linux command line experience to users of mobile devices with no rooting or other special setup required. How does it work The terminal emulator is basically an application that launches the command line program by using system call execve and redirecting standard input, output and error streams onto the display. Most terminal applications available on Android OS work with a very limited set of utilities which are usually provided either by the operating system or other rooting tools such as Magisk. We have decided to go further and port common software usually available on GNU/Linux systems to Android OS. Termux is neither a virtual machine nor any other kind of emulated or simulated environment. All provided packages are cross-compiled with Android NDK and only have compatibility patches to get them working on Android. The ope