You have managed, after several tries, to install a backdoor shell 

(Locus7Shell) to <a href="ch008/" target="_blank">trytohack.gr<br /></a> <br /> The 

problem is that, in order to execute the majority of the commands  (on the machine running 

the backdoor) you must have super-user rights  (root).<br /> <br /> Your aim is to obtain 

root rights.