See also
*References
{{reflist, refs= {{citation , first=Archna , last=Verma , year=2006 , title=Unix and Shell Programming , page=84 , publisher=Laxmi Publications , isbn=81-7008-958-1 , url=https://books.google.com/books?id=JhS-TkW0tOYC&pg=PA84 {{citation , first1=Kenneth H. , last1=Rosen , first2=Douglas A. , last2=Host , first3=Rachel , last3=Klee , page=514 , title=UNIX: the complete reference , year=2006 , series=Complete Reference Series , edition=2nd , publisher=McGraw-Hill Professional , isbn=0-07-226336-9 , url=https://books.google.com/books?id=2Et--84HIkwC&pg=PA514 {{citation , first1=W. Richard , last1=Stevens , first2=Bill , last2=Fenner , first3=Andrew M. , last3=Rudoff , page=372 , title=UNIX Network Programming: The sockets networking API , series=Addison-Wesley professional computing series , edition=3rd , publisher=Addison-Wesley Professional , year=2004 , isbn=0-13-141155-1 , url=https://books.google.com/books?id=ptSC4LpwGA0C&pg=PA372 Unix Unix daemons