Up
linux[3.13.0-29-generic]
system[GNU C Library (GNU libc) stable release version 2.21, by Roland McGrath et al.]
/nix/store/fxisrpncjn4cxxwnq2lvilriqx63s9k9-fs_test
Totalext4_loop[mke2fs 1.42.9 (4-Feb-2014)]
mkdir 511