The Linux Network Administrator's Guide (NAG) is a book on setting up and running Unixnetworks. NAG is freely available in electronic form. It was produced by Olaf Kirch[?] and others as part of the Linux Documentation Project with help from O'Reilly and Associates[?]. The second edition was last updated March 2000.
... householder with no husband present, and 24.0% are non-families. 19.0% of all households are made up of individuals and 7.0% have someone living alone who is 65 years ...