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Full Discussion: who - uniq output
Top Forums Shell Programming and Scripting who - uniq output Post 302250979 by joeyg on Friday 24th of October 2008 04:45:02 PM
Old 10-24-2008
Tools

Excluding root

Code:
> cat uniq_names
#! /usr/bin/bash

who | awk '$1!~"root" {line[$1] = $1
     sum[$1]++}
    END{
     for(i in sum)
     if (sum[i]>0)
       print line[i]
}'

 

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SUM(1)								   User Commands							    SUM(1)

NAME
sum - checksum and count the blocks in a file SYNOPSIS
sum [OPTION]... [FILE]... DESCRIPTION
Print checksum and block counts for each FILE. -r use BSD sum algorithm, use 1K blocks -s, --sysv use System V sum algorithm, use 512 bytes blocks --help display this help and exit --version output version information and exit With no FILE, or when FILE is -, read standard input. AUTHOR
Written by Kayvan Aghaiepour and David MacKenzie. REPORTING BUGS
Report sum bugs to bug-coreutils@gnu.org GNU coreutils home page: <http://www.gnu.org/software/coreutils/> General help using GNU software: <http://www.gnu.org/gethelp/> Report sum translation bugs to <http://translationproject.org/team/> COPYRIGHT
Copyright (C) 2010 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. SEE ALSO
The full documentation for sum is maintained as a Texinfo manual. If the info and sum programs are properly installed at your site, the command info coreutils 'sum invocation' should give you access to the complete manual. GNU coreutils 8.5 February 2011 SUM(1)
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