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finger - user information lookup program

 

NAME

      finger - user information lookup program
 

SYNOPSIS

      finger [-46glmpshoT] [user ...] [user@host ...]
 

DESCRIPTION

      The finger utility displays information about the system users.
 
      Options are:
 
      -4      Forces finger to use IPv4 addresses only.
 
      -6      Forces finger to use IPv6 addresses only.
 
      -s      Display the user’s login name, real name, terminal name and write
              status (as a ‘‘*’’ before the terminal name if write permission
              is denied), idle time, login time, and either office location and
              office phone number, or the remote host.  If -o is given, the
              office location and office phone number is printed (the default).
              If -h is given, the remote host is printed instead.
 
              Idle time is in minutes if it is a single integer, hours and min‐
              utes if a ‘‘:’’ is present, or days if a ‘‘d’’ is present.  If it
              is an “*”, the login time indicates the time of last login.
              Login time is displayed as the day name if less than 6 days, else
              month, day; hours and minutes, unless more than six months ago,
              in which case the year is displayed rather than the hours and
              minutes.
 
              Unknown devices as well as nonexistent idle and login times are
              displayed as single asterisks.
 
      -h      When used in conjunction with the -s option, the name of the
              remote host is displayed instead of the office location and
              office phone.
 
      -o      When used in conjunction with the -s option, the office location
              and office phone information is displayed instead of the name of
              the remote host.
 
      -g      This option restricts the gecos output to only the users’ real
              name. It also has the side-effect of restricting the output of
              the remote host when used in conjunction with the -h option.
 
      -l      Produce a multi-line format displaying all of the information
              described for the -s option as well as the user’s home directory,
              home phone number, login shell, mail status, and the contents of
              the files .forward, .plan, .project and .pubkey from the user’s
              home directory.
 
              If idle time is at least a minute and less than a day, it is pre‐
              sented in the form ‘‘hh:mm’’.  Idle times greater than a day are
              presented as ‘‘d day[s]hh:mm’’.
 
              Phone numbers specified as eleven digits are printed as ‘‘+N-NNN-
              NNN-NNNN’’.  Numbers specified as ten or seven digits are printed
              as the appropriate subset of that string.  Numbers specified as
              five digits are printed as ‘‘xN-NNNN’’.  Numbers specified as
              four digits are printed as ‘‘xNNNN’’.
 
              If write permission is denied to the device, the phrase ‘‘(mes‐
              sages off)’’ is appended to the line containing the device name.
              One entry per user is displayed with the -l option; if a user is
              logged on multiple times, terminal information is repeated once
              per login.
 
              Mail status is shown as ‘‘No Mail.’’ if there is no mail at all,
              ‘‘Mail last read DDD MMM ## HH:MM YYYY (TZ)’’ if the person has
              looked at their mailbox since new mail arriving, or ‘‘New mail
              received ...’’, ‘‘Unread since ...’’ if they have new mail.
 
      -p      Prevent the -l option of finger from displaying the contents of
              the .forward, .plan, .project and .pubkey files.
 
      -m      Prevent matching of user names.  User is usually a login name;
              however, matching will also be done on the users’ real names,
              unless the -m option is supplied.  All name matching performed by
              finger is case insensitive.
 
      -T      Disable the piggybacking of data on the initial connection
              request.  This option is needed to finger hosts with a broken TCP
              implementation.
 
      If no options are specified, finger defaults to the -l style output if
      operands are provided, otherwise to the -s style.  Note that some fields
      may be missing, in either format, if information is not available for
      them.
 
      If no arguments are specified, finger will print an entry for each user
      currently logged into the system.
 
      The finger utility may be used to look up users on a remote machine.  The
      format is to specify a user as “user@host”, or “@host”, where the default
      output format for the former is the -l style, and the default output for‐
      mat for the latter is the -s style.  The -l option is the only option
      that may be passed to a remote machine.
 
      If the file .nofinger exists in the user’s home directory, finger behaves
      as if the user in question does not exist.
 
      The optional finger.conf(5) configuration file can be used to specify
      aliases.  Since finger is invoked by fingerd(8), aliases will work for
      both local and network queries.
 

ENVIRONMENT

      The finger utility utilizes the following environment variable, if it
      exists:
 
      FINGER      This variable may be set with favored options to finger.
 

FILES

      /etc/finger.conf  alias definition data base
      /var/log/lastlog  last login data base
      chpass(1), w(1), who(1), finger.conf(5), fingerd(8)
 
      D. Zimmerman, The Finger User Information Protocol, RFC 1288, December,
      1991.
 

HISTORY

      The finger command appeared in 3.0BSD.
 

BUGS

      The current FINGER protocol RFC requires that the client keep the connec‐
      tion fully open until the server closes.  This prevents the use of the
      optimal three-packet T/TCP exchange.  (Servers which depend on this
      requirement are bogus but have nonetheless been observed in the Internet
      at large.)
 

Sections

Based on BSD UNIX
FreeBSD is an advanced operating system for x86 compatible (including Pentium and Athlon), amd64 compatible (including Opteron, Athlon64, and EM64T), UltraSPARC, IA-64, PC-98 and ARM architectures. It is derived from BSD, the version of UNIX developed at the University of California, Berkeley. It is developed and maintained by a large team of individuals. Additional platforms are in various stages of development.