.th UTMP V 5/31/77 .sh NAME utmp \*- user information .sh DESCRIPTION This file allows one to discover information about who is currently using UNIX. The file is binary; each entry is 16(10) bytes long. The first eight bytes contain a user's login name or are null if the table slot is unused. The low order byte of the next word contains the last character of a terminal name. The next two words contain the user's login time. The last word is unused. .sh FILES /etc/utmp .sh "SEE ALSO" init(VIII) and login(I), which maintain the file; who(I), which interprets it.