Without further ado, the following was found: Issue: (missing) markup for command names "A recursive login, as used to be possible in the good old days, no longer " "works; for most purposes B<su>(1) is a satisfactory substitute. Indeed, for " "security reasons, B<login> does a B<vhangup>(2) system call to remove any " "possible listening processes on the tty. This is to avoid password sniffing. " "If one uses the command B<login>, then the surrounding shell gets killed by " "B<vhangup>(2) because it\\(cqs no longer the true owner of the tty. This can " "be avoided by using B<exec login> in a top-level shell or xterm."
