proot 5.3.0 Unprivileged chroot, bind mount, and binfmt_misc
PRoot is a user-space implementation of
mount --bind, and
binfmt_misc. This means that users don't need any privileges or setup to do things like using an arbitrary directory as the new root file system, making files accessible somewhere else in the file system hierarchy, or executing programs built for another CPU architecture transparently through QEMU user-mode. Also, developers can use PRoot as a generic process instrumentation engine thanks to its extension mechanism. Technically PRoot relies on
ptrace, an unprivileged system-call available in the kernel Linux.