WHO(I)                       3/15/72                       WHO(I)


     who  -  who is on the system


     who [ who-file ] [ am I ]


     Who,  without  an  argument,  lists  the  name,   typewriter

     channel, and login time for each current UNIX user.

     Without an argument, who  examines  the  /etc/utmp  file  to

     obtain  its  information.   If a file is given, that file is

     examined.  Typically the given file will  be  /usr/adm/wtmp,

     which  contains  a  record  of  all  the logins since it was

     created.  Then who lists logins, logouts, and crashes  since

     the  creation  of  the wtmp file.  Each login is listed with

     user name, typewriter name (with  `/dev/'  suppressed),  and

     date and time.  When an argument is given, logouts produce a

     similar line without a user name.  Reboots  produce  a  line

     with  `x' in the place of the device name, and a fossil time

     indicative of when the system went down.

     With two arguments, who behaves as if it  had  no  arguments

     except  for  restricting  the  printout  to the line for the

     current typewriter.  Thus `who am  I'  (and  also  `who  are

     you') tells you who you are logged in as.




     login (I), init (VIII)