Recruiter contact me via LinkedIn , He was super nice . The interviewer was not professional. The interview was about system administrator and scripting . He foucesd on one subject . So That was bad because if you don't have experience in this subject you will fail. Overall: the recruiter was great , he really cared about me succeeding in the interview. Done his job right. The interviewer was not professional and was not responsive did not give hints. First phase questions specific about kernel : He expected from me to know about kernel in depth which is not possible if you are not working in that field . Btw i have interview with the team leader of this role before this interview to ask him questions about the role he did not mention anything about kernel .. So ..? Second phase scripting : he expected that i remember linux commands with their flags which is not possible to do without using man guides. Or at least terminal. The interview went on using google docs which maybe works for coding but not for linux that's for sure.