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Full Discussion: comparing output of who command
Top Forums Shell Programming and Scripting comparing output of who command Post 302495906 by joeyg on Friday 11th of February 2011 02:40:33 PM
Old 02-11-2011
Something like...
I copied the output of your who command to a sample file. So in place of cat sample7.txt you would substitute your who command.

Code:
$ cat sample7.txt
tander01    pts/113     Feb 11 09:21     (10.25.1.23)
tbanks      pts/81      Feb 11 08:19     (10.2.1.20)
tbucy       pts/28      Feb 11 07:11     (10.14.1.11)
tchhuom     pts/100     Feb 11 08:45     (10.10.1.16)
tchhuom     pts/101     Feb 11 08:45     (10.10.1.16)
tchhuom     pts/182     Feb 11 13:55     (10.10.1.30)
tcowan      pts/109     Feb 11 09:01     (10.201.33.1)
tdavis04    pts/128     Feb 11 13:07     (10.10.1.47)

$ grep `cat sample7.txt | cut -d" " -f1 | sort | uniq -d` sample7.txt
tchhuom     pts/100     Feb 11 08:45     (10.10.1.16)
tchhuom     pts/101     Feb 11 08:45     (10.10.1.16)
tchhuom     pts/182     Feb 11 13:55     (10.10.1.30)


$ cat sample7.txt | grep `cat sample7.txt | cut -d" " -f1 | sort | uniq -d`
tchhuom     pts/100     Feb 11 08:45     (10.10.1.16)
tchhuom     pts/101     Feb 11 08:45     (10.10.1.16)
tchhuom     pts/182     Feb 11 13:55     (10.10.1.30)

This User Gave Thanks to joeyg For This Post:
mshilling
 

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LEARN ABOUT BSD

pts_source

PTS_SOURCE(1)						       AFS Command Reference						     PTS_SOURCE(1)

NAME

       pts_source - Read pts commands from a file

SYNOPSIS

       pts source [-file] <file name> [-cell] <cell name>
	  [-noauth] [-localauth] [-force]

       pts so [-f] <file name> [-c] <cell name>
	  [-n] [-l] [-f]

DESCRIPTION

       The pts source runs commands from a file as if they were typed in pts interactive mode. The command can be run from the command line or
       interactively.

CAUTIONS

       Prior to OpenAFS 1.4.5 and OpenAFS 1.5.23, the pts source command was only available on Unix or Linux and when OpenAFS was compiled with
       the supergroups option (disabled by default).  As of OpenAFS 1.4.5 and 1.5.23, it is always available.

OPTIONS

       pts source takes the following options:

       -cell <cell name>
	   Names the cell in which to run the command. For more details, see pts(1).

       -force
	   Enables the command to continue executing as far as possible when errors or other problems occur, rather than halting execution at the
	   first error.

       -help
	   Prints the online help for this command. All other valid options are ignored.

       -localauth
	   Constructs a server ticket using a key from the local /etc/openafs/server/KeyFile file. Do not combine this flag with the -cell or
	   -noauth options. For more details, see pts(1).

       -noauth
	   Assigns the unprivileged identity anonymous to the issuer. For more details, see pts(1).

OUTPUT

       This command shows the output of each command in the file as if it were run normally.

EXAMPLES

       Here is an example of using pts source in a pts interactive session:

	  % echo examine admin > /tmp/commands.txt
	  % pts interactive
	  pts> source /tmp/commands.txt
	  Name: admin, id: 1, owner: system:administrators, creator: anonymous,
	    membership: 2, flags: S----, group quota: 20.
	  pts> quit
	  %

SEE ALSO

       pts(1), pts_interactive(1), pts_quit(1), pts_sleep(1)

COPYRIGHT

       Copyright 2007 Jason Edgecombe <jason@rampaginggeek.com>

       This documentation is covered by the BSD License as written in the doc/LICENSE file. This man page was written by Jason Edgecombe for
       OpenAFS.

OpenAFS 							    2014-04-08							     PTS_SOURCE(1)
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