Rootbash is a no-password alternative to su.
... Yeah, don't actually use that unless you know what you're doing and no one else can touch your computer.
You need a temporary root access to use Rootbash. Look into single-user mode, if your distro allows it. If it doesn't and you have no other way to be root, too bad!
git clone https://github.com/Schlipak/rootbash
sudo makeIf you can't make as root, the ownership or sticky bits of the program won't be set properly and it won't do its job!
No make install for you, because this is a risky program, so put it in your $PATH yourself if you're really sure.
rootbash [SHELL_PATH]I am not responsible of the damage that you can cause to your system through the misuse of this program, please be carefull what you type in your terminal!