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Annotation of researchv10dc/man/adm/man1/who.1, revision 1.1.1.1

1.1       root        1: .TH WHO 1
                      2: .CT 1 comm_users sa_mortals
                      3: .SH NAME
                      4: who, whois, last \- who is or was on the system
                      5: .SH SYNOPSIS
                      6: .B who
                      7: [
                      8: .B -i
                      9: ]
                     10: [
                     11: .I who-file
                     12: ]
                     13: .PP
                     14: .B who am i
                     15: .PP
                     16: .B whois
                     17: .I username
                     18: .PP
                     19: .B last
                     20: [
                     21: .B -f
                     22: .I who-file
                     23: ]
                     24: [
                     25: .I userid ...
                     26: ]
                     27: [
                     28: .I terminal
                     29: ]
                     30: .SH DESCRIPTION
                     31: .I Who,
                     32: without an argument,
                     33: lists the login name, terminal name, and login time
                     34: for each current user.
                     35: With the
                     36: .B -i
                     37: option, the report includes the number of minutes
                     38: that the user's terminal has been idle.
                     39: .PP
                     40: With two arguments,
                     41: as in
                     42: .LR "who am i" ,
                     43: .I who
                     44: tells who you are logged in as.
                     45: .PP
                     46: Without an argument,
                     47: .I who
                     48: examines the
                     49: .F /etc/utmp
                     50: file to obtain its information.
                     51: If a file is given, that file is examined.
                     52: Typically the given file will be
                     53: .FR /usr/adm/wtmp ,
                     54: which contains a record of all the logins since it
                     55: was created.
                     56: Then
                     57: .I who
                     58: lists
                     59: logins, logouts, and crashes since the creation of
                     60: the wtmp file.
                     61: Each login is listed with user name,
                     62: terminal name (with
                     63: .L /dev/
                     64: suppressed),
                     65: and date and time.
                     66: When an argument is given, logouts produce a similar line without a user name.
                     67: Reboots produce a line with 
                     68: .L x
                     69: in the place of the device name,
                     70: and a fossil time indicative of when the system went down.
                     71: .PP
                     72: .I Whois
                     73: consults administrative files to identify the
                     74: .I username.
                     75: (Actually,
                     76: .I whois
                     77: uses
                     78: .IR grep
                     79: and can locate information by any useful key, such
                     80: as real name or telephone number.)
                     81: .PP
                     82: .I Last
                     83: reports logins and logouts in reverse chronological order.
                     84: Optional arguments restrict attention to selected userids or
                     85: terminals.
                     86: Terminals
                     87: .BR tty0 ", " tty1 ", ..."
                     88: may be abbreviated
                     89: .BR 0 ", " 1 ", ..."
                     90: .PP
                     91: By default,
                     92: .I last
                     93: examines the list of logins and logouts in
                     94: .FR /usr/adm/wtmp ;
                     95: option
                     96: .B -f
                     97: specifies a different file.
                     98: .PP
                     99: .I Last
                    100: reports userid, terminal,
                    101: time on, and time off for all users, or for selected
                    102: .IR userids.
                    103: A pseudo-user,
                    104: .LR reboot ,
                    105: is logged in at reboots of the system.
                    106: .PP
                    107: Upon interrupt,
                    108: .I last
                    109: tells how far back it has looked;
                    110: upon quit 
                    111: .RB (control- \e )
                    112: it tells how far and keeps on looking.
                    113: .SH EXAMPLES
                    114: .TP
                    115: .B last reboot
                    116: Report recent system outages.
                    117: .SH FILES
                    118: .F /etc/utmp
                    119: .br
                    120: .F /usr/adm/wtmp
                    121: .br
                    122: .F /usr/adm/usrlist
                    123: .br
                    124: .F /etc/passwd
                    125: .SH "SEE ALSO"
                    126: .IR getuid (1), 
                    127: .IR getuid (2), 
                    128: .IR utmp (5), 
                    129: .IR ac (8),
                    130: .IR tty (1),
                    131: .IR vwhois
                    132: in
                    133: .IR vismon (9.1)

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