ramboot rpi # ls bin/bash -lh
-rwxr-xr-x 1 root root 795K Jan 11  2013 bin/bash
ramboot rpi # strace chroot . bin/bash
execve("/usr/bin/chroot", ["chroot", ".", "bin/bash"], [/* 49 vars */]) = 0
...
chroot(".")                             = 0
chdir("/")                              = 0
execve("bin/bash", ["bin/bash"], [/* 49 vars */]) = -1 ENOENT (No such file or directory)
open("/usr/lib/charset.alias", O_RDONLY|O_LARGEFILE|O_NOFOLLOW) = -1 ENOENT (No such file or directory)
write(2, "chroot: ", 8chroot: )                 = 8
write(2, "failed to run command \342\200\230bin/bas"..., 36failed to run command ‘bin/bash’) = 36
...