I do not completely agree, couple of my lab-mates (doing PhD in CS/ECE) still stuck at windows, they know what an OS is but they do not seem to care that "doing

I do not completely agree, couple of my lab-mates (doing PhD in CS/ECE) still stuck at windows, they know what an OS is but they do not seem to care that "doing ssh to connect to one of the school servers is a basic human right" -- they search the web to download a software to do that, very sad. Moreover, I know one postdoc (CS major) who uses a mac but never did "ps -u <username>" on a terminal.