unabled to config, how to install rootdev, cgpt, and make_dev_ssd.sh

[javenhmh]

@Penguin:/Downloads$ curl https://raw.githubusercontent.com/divx118/crouton-packages/master/change-kernel-flags -o change-kernel-flags
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 11879 100 11879 0 0 11433 0 0:00:01 0:00:01 --:--:-- 11433
@Penguin:/Downloads$
@Penguin:/Downloads$ sudo cp /Downloads/change-kernel-flags /usr/local/bin
@Penguin:/Downloads$ sudo chmod +x /usr/local/bin/change-kernel-flags
@Penguin:/Downloads$ sudo change-kernel-flags
/usr/local/bin/change-kernel-flags: 1: rootdev: not found
/usr/local/bin/change-kernel-flags: 1: cgpt: not found
/tmp/change-kernel-flags.SA1.
/usr/local/bin/change-kernel-flags: 248: /usr/share/vboot/bin/make_dev_ssd.sh: not found
make_dev_ssd.sh --save_config Failed