last Command
  
  
  Purpose
  
  Displays information about previous logins.
  
   Syntax
  
  last [  -f FileName ] [ -Number ] [ Name ... ] [ Terminal ... ]
  
  Description
  
  The last command displays, in reverse chronological order, all
  previous logins and logoffs still recorded in the /var/adm/wtmp
  file.  The /var/adm/wtmp file collects login and logout records
  as these events occur and holds  them  until the records are pro-
  cessed by the acctcon1 and acctcon2 commands as part of the daily
  reporting procedures.
  
  The list can be restricted to:
  
  *	The number of lines specified by the -Number parameter.
  
  *	Logins or logoffs by the users specified by the Name parameter.
  
  *	Logins or logoffs from the terminals specified by the Terminal
  parameter.
  
  A terminal can be named fully or abbreviated as a tty.  For exam-
  ple, you can specify either the tty0 terminal or the 0 terminal.
  
  If you specify both a Name and Terminal parameter, the last com-
  mand displays all logins and logoffs meeting either criterion.
  
  For each process, the last command displays the:
  
  *	Time the session began
  
  *	Duration
  
  *	Terminal (tty) used
  
  If applicable, the following information is included:
  
  *	Terminations due to rebooting
  
  *	Sessions that are still continuing
  
  If the last command is interrupted, it indicates how far the
  search has progressed in the /var/adm/wtmp file.  If interrupted
  with a quit signal, the command indicates how far the search has
  progressed and then continues the search.  The quit signal can be
  any one of the following:
  
  #define SIGQUIT 3 /* (*) quit, genertated from   terminal special char */
  
  #define SIGKILL 9 /* kill (cannot be caught or ignored) */
  
  #define SIGTERM 15 /* software termination signal */
  
  The kill command sends the default SIGTERM signal when it is in-
  voked without any option.  If you want to  send  the SIGQUIT sig-
  nal, enter the following:
  
  kill -3 (Process ID)
  
  See the  kill command for more information.
  
  Flags
  
  -f FileName	Specifies an alternate file from which to read logins
  and logoffs.
  
  Examples
  
  1.	To display all the recorded logins and logoffs by user root or
  from the console terminal, enter:
  
  last root console
  
  2.	To display the time between reboots of the system, enter:
  
  last reboot
  
  The reboot pseudo-user logs in when the system starts again.
  
  Implementation Specifics
  
  This command is part of Accounting Services in the Base Operating
  System Extensions 2 and is provided for compatibility with Berke-
  ley Software Distribution (BSD) systems.
  
  Files
  
  /usr/bin/last	Specifies the path to the last command.
  
   /var/adm/wtmp	Contains connect-time accounting data, including
  login, logoff, and shutdown records.
  
  Related Information
  
  The  acctcon1 and accton2 command,  lastlogin command.
  
  For more information about the Accounting System, the preparation
  of daily and monthly reports, and the accounting files, see the 
  Accounting Overview in AIX Version 3.2 System Management Guide:
  Operating System and Devices
  
   How to Set Up an Accounting System in AIX Version 3.2 System
  Management Guide: Operating System and Devices describes the
  steps you must take to establish an accounting system.