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Top Forums Shell Programming and Scripting finding duplicates in columns and removing lines Post 302189018 by totus on Thursday 24th of April 2008 06:05:12 PM
Old 04-24-2008
Quote:
Originally Posted by aigles
Code:
awk -F, '! mail[$3]++' inputfile

Jean-Pierre.
Jean-Pierre,

This seemed to work but I noticed that there seem to be a few duplicated left behind. How does the array know what the delimiter? $3 is the field, but not clear on delimiter. Would the same work with tabs for delimiter?

Cheers!Smilie
 

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hostid(1)						      General Commands Manual							 hostid(1)

NAME
hostid - Sets or displays the identifier of the local host SYNOPSIS
/usr/sbin/hostid [hostname | hexadecimal_number | internet_address] DESCRIPTION
The hostid command displays the 32-bit identifier of the host as a hexadecimal number in host standard byte order. The identifier must be unique across all hosts and is commonly set to the Internet address of the specified host. The superuser can set the host ID by specifying a hostname, internet_address, or hexadecimal_number argument. The identifier is stored in network standard byte order. EXAMPLES
To display the identifier of the local host, enter: $ hostid 0xc009c803 The hostid command displays the identifier of the host as a hexadecimal number in host standard byte order. To set the identifier of the local host to the local Internet address, enter: $ hostid 555.5.55.555 The hostid command converts the Internet address to its hexadecimal equivalent, and then sets the local host to this address. Note that the sample Internet address in this example, 555.5.55.555, is not a valid Internet address and would cause hostid to return an error. SEE ALSO
Commands: hostname(1) Functions: gethostid(2), sethostid(2) hostid(1)
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