Linux (as well as many other areas of information technology) is particularly well suited for studying at home because (1) no equipment is needed other than an ordinary personal computer and (2) there is a large amount of free or modestly priced study material that is available from bookstores, in …

In addition to the real uid, each process also has an effective uid, a saved uid, and a filesystem uid. The terminal in Linux is a wild card. Whereas sockets communicating over the Internet might use a hostname and port pair for identifying the target of communication, Unix domain sockets …