Knowledge:Operating Systems: Unix-like (Linux, BSD, QNX).Programming languages: C, Perl, Python, PHP, Shell (sh, sed, awk).Databases: PostgreSQL, MySQL, NoSQL (BDB, MongoDB).Web: HTML, CSS, Javascript, AJAX.Networks: IP Addressing, NAT, Firewalls.SpecialtiesAnalysis, design and programming of systems on Unix-like (POSIX).Embedded systems with Linux.