www.delorie.com/gnu/docs/textutils/coreutils_131.html   search  
 
Buy GNU books!


GNU Core-utils

[ < ] [ > ]   [ << ] [ Up ] [ >> ]         [Top] [Contents] [Index] [ ? ]

20.6 who: Print who is currently logged in

who prints information about users who are currently logged on. Synopsis:

 
who [option] [file] [am i]

If given no non-option arguments, who prints the following information for each user currently logged on: login name, terminal line, login time, and remote hostname or X display.

If given one non-option argument, who uses that instead of `/etc/utmp' as the name of the file containing the record of users logged on. `/etc/wtmp' is commonly given as an argument to who to look at who has previously logged on.

If given two non-option arguments, who prints only the entry for the user running it (determined from its standard input), preceded by the hostname. Traditionally, the two arguments given are `am i', as in `who am i'.

The program accepts the following options. Also see 2. Common options.

`-m'
Same as `who am i'.

`-q'
`--count'
Print only the login names and the number of users logged on. Overrides all other options.

`-s'
Ignored; for compatibility with other versions of who.

`-i'
`-u'
`--idle'
After the login time, print the number of hours and minutes that the user has been idle. `.' means the user was active in last minute. `old' means the user was idle for more than 24 hours.

`-l'
`--lookup'
Attempt to canonicalize hostnames found in utmp through a DNS lookup. This is not the default because it can cause significant delays on systems with automatic dial-up internet access.

`-H'
`--heading'
Print a line of column headings.

`-w'
`-T'
`--mesg'
`--message'
`--writable'
After each login name print a character indicating the user's message status:

 
`+' allowing write messages
`-' disallowing write messages
`?' cannot find terminal device


[ < ] [ > ]   [ << ] [ Up ] [ >> ]         [Top] [Contents] [Index] [ ? ]

  webmaster     delorie software   privacy  
  Copyright 2003   by The Free Software Foundation     Updated Jun 2003