Incidentally after years of resisting last time I updated my resume I removed every reference to UNIX and almost everything else non-Linux. I realize there are still jobs out there where it's a in-demand skillset but it just sounded dated, braggy, fabricated to mention my past experience with HP-UX, AIX, and Solaris in a world where it won't be relevant for 99% of the jobs I'm applying for. Also it's been so long since I worked with them I'm not even sure I can confidently claim them as legitimate skills anymore even if an employer felt they were valuable.