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.
... them, 62.2% are married couples living together, 17.0% have a female householder with no husband present, and 15.9% are non-families. 13.0% of all households are made up ...