NAME

utmp − user information

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 typewriter name.  The next two words contain the user’s login time.  The last word is unused. 

FILES

/etc/utmp

SEE ALSO

init (VIII) and login (I), which maintain the file; who (I), which interprets it.