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Shell Programming and Scripting
I need to extract last column of a file and compare the values
Post 302130262 by vukkusila on Saturday 4th of August 2007 08:28:34 AM
08-04-2007
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Dear Unix experts,
I have got a file where I would like to compare the values of second column if first column is same in such a way that the difference between the values is >50. If not, I would like to discard both values.
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Judi # cat File1
judi /export/home 76
judi /usr 83
judi #
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LEARN ABOUT OSX
unique
UNIQUE(8) System Manager's Manual UNIQUE(8) NAME
unique - removes duplicates from a wordlist SYNOPSIS
unique output-file DESCRIPTION
This manual page documents briefly the unique command, which is part of the john package. This manual page was written for the Debian GNU/Linux distribution because the original program does not have a manual page. john, better known as John the Ripper, is a tool to find weak passwords of users in a server. The unique tool finds and removes duplicate entries from a wordlist (read from stdin), without changing the order. This is important to increase the performance of john when using the wordlist method. SEE ALSO
john(8), mailer(8), unafs(8), unshadow(8). The programs are documented fully by John's documentation, which should be available in /usr/share/doc/john or other location, depending on your system. AUTHOR
This manual page was written by Jordi Mallach <jordi@debian.org>, for the Debian GNU/Linux system (but may be used by others). John the Ripper and mailer were written by Solar Designer <solar@openwall.com>. The complete list of contributors can be found in the CRED- ITS file in the documentation directory. john June 03, 2004 UNIQUE(8)