Annotation of src/usr.bin/last/last.1, Revision 1.3
1.3 ! jdm 1: .\" $OpenBSD: last.1,v 1.2 1996/06/26 05:34:51 deraadt Exp $
1.1 deraadt 2: .\" $NetBSD: last.1,v 1.3 1994/12/21 22:41:23 jtc Exp $
3: .\"
4: .\" Copyright (c) 1980, 1990, 1993
5: .\" The Regents of the University of California. All rights reserved.
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8: .\" modification, are permitted provided that the following conditions
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10: .\" 1. Redistributions of source code must retain the above copyright
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12: .\" 2. Redistributions in binary form must reproduce the above copyright
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15: .\" 3. All advertising materials mentioning features or use of this software
16: .\" must display the following acknowledgement:
17: .\" This product includes software developed by the University of
18: .\" California, Berkeley and its contributors.
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20: .\" may be used to endorse or promote products derived from this software
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35: .\" @(#)last.1 8.1 (Berkeley) 6/6/93
36: .\"
37: .Dd June 6, 1993
38: .Dt LAST 1
39: .Os BSD 4
40: .Sh NAME
41: .Nm last
42: .Nd indicate last logins of users and ttys
43: .Sh SYNOPSIS
44: .Nm last
45: .Op Fl Ns Ar n
46: .Op Fl f Ar file
47: .Op Fl h Ar host
48: .Op Fl t Ar tty
1.3 ! jdm 49: .Op Fl d Ar [[CC]YY][MMDD]hhmm[.SS]
1.1 deraadt 50: .Op user ...
51: .Sh DESCRIPTION
52: .Nm Last
1.3 ! jdm 53: will either (1) list the sessions of specified
1.1 deraadt 54: .Ar users ,
55: .Ar ttys ,
56: and
1.3 ! jdm 57: .Ar hosts ,
! 58: in reverse time order,
! 59: or (2) list the users logged in at a specified snapshot date & time
1.1 deraadt 60: in reverse time order. Each line of output contains
61: the user name, the tty from which the session was conducted, any
62: hostname, the start and stop times for the session, and the duration
63: of the session. If the session is still continuing or was cut short by
64: a crash or shutdown,
65: .Nm last
66: will so indicate.
67: .Pp
68: .Bl -tag -width indent-two
69: .It Fl f Ar file
70: .Nm Last
71: reads the file
72: .Ar file
73: instead of the default,
74: .Pa /var/log/wtmp .
75: .It Fl Ar n
76: Limits the report to
77: .Ar n
78: lines.
79: .It Fl t Ar tty
80: Specify the
81: .Ar tty .
82: Tty names may be given fully or abbreviated, for example,
83: .Dq Li "last -t 03"
84: is
85: equivalent to
86: .Dq Li "last -t tty03" .
87: .It Fl h Ar host
88: .Ar Host
89: names may be names or internet numbers.
1.3 ! jdm 90: .It Fl d Ar date
! 91: Specify the snapshot date & time.
! 92: All users logged in at the snapshot date & time will
! 93: be reported.
! 94: This may be used with the
! 95: .Ar -f file
! 96: option to derive the results from stored wtmp files.
! 97: When this argument is provided, all other options except for
! 98: .Ar -f file
! 99: and
! 100: .Ar -n
! 101: are ignored.
! 102: The argument should be in the form
! 103: .Dq [[CC]YY][MMDD]hhmm[.SS]
! 104: where each pair of letters represents the following:
! 105: .Pp
! 106: .Bl -tag -width Ds -compact -offset indent
! 107: .It Ar CC
! 108: The first two digits of the year (the century).
! 109: .It Ar YY
! 110: The second two digits of the year.
! 111: If
! 112: .Dq YY
! 113: is specified, but
! 114: .Dq CC
! 115: is not, a value for
! 116: .Dq YY
! 117: between 69 and 99 results in a
! 118: .Dq YY
! 119: value of 19.
! 120: Otherwise, a
! 121: .Dq YY
! 122: value of 20 is used.
! 123: .It Ar MM
! 124: The month of the year, from 1 to 12.
! 125: .It Ar DD
! 126: the day of the month, from 1 to 31.
! 127: .It Ar hh
! 128: The hour of the day, from 0 to 23.
! 129: .It Ar mm
! 130: The minute of the hour, from 0 to 59.
! 131: .It Ar SS
! 132: The second of the minute, from 0 to 61.
! 133: .El
! 134: .Pp
! 135: If the
! 136: .Dq CC
! 137: and
! 138: .Dq YY
! 139: letter pairs are not specified, the values default to the current
! 140: year.
! 141: If the
! 142: .Dq SS
! 143: letter pair is not specified, the value defaults to 0.
1.1 deraadt 144: .El
145: .Pp
146: If
1.3 ! jdm 147: multiple arguments are given, and a snapshot time is not specified, the
! 148: information which applies to any of the
1.1 deraadt 149: arguments is printed, e.g.,
150: .Dq Li "last root -t console"
151: would list all of
152: .Dq Li root Ns 's
153: sessions as well as all sessions on the console terminal. If no
154: users, hostnames or terminals are specified,
155: .Nm last
156: prints a record of
157: all logins and logouts.
158: .Pp
159: The pseudo-user
160: .Ar reboot
161: logs in at reboots of the system, thus
162: .Dq Li last reboot
163: will give an indication of mean time between reboot.
164: .Pp
165: If
166: .Nm last
167: is interrupted, it indicates to what date the search has
168: progressed. If interrupted with a quit signal
169: .Nm last
170: indicates how
171: far the search has progressed and then continues.
172: .Sh FILES
173: .Bl -tag -width /var/log/wtmp -compact
174: .It Pa /var/log/wtmp
175: login data base
176: .El
177: .Sh SEE ALSO
178: .Xr lastcomm 1 ,
179: .Xr utmp 5 ,
180: .Xr ac 8
181: .Sh HISTORY
182: .Nm Last
183: appeared in
184: .Bx 3.0 .
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