英文原版Unix in a Nutshell 4th Edition

Asanopenoperatingsystem,Unixcanbeimprovedonbyanyoneandeveryone:individuals,companies,universities,andmore.Asaresult,theverynatureofUnixhasbeenalteredovertheyearsbynumerousextensionsformulatedinanassortmentofversions.Today,UnixencompasseseverythingfromSu