md5sum, sha256sum, sha512sum are defined but sha1sum is not. Is this by design?
Works for me: $ tar xf busybox-1.17.4.tar.bz2 $ cd busybox-1.17.4 $ make defconfig ... $ make ... $ ./busybox sha1sum <LICENSE c47a888f2be626e1197b6f651dee966ef882077d -