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Top Forums Shell Programming and Scripting Find duplicate values in specific column and delete all the duplicate values Post 302985863 by sajmar on Wednesday 16th of November 2016 11:38:04 AM
Old 11-16-2016
Find duplicate values in specific column and delete all the duplicate values

Dear folks

I have a map file of around 54K lines and some of the values in the second column have the same value and I want to find them and delete all of the same values. I looked over duplicate commands but my case is not to keep one of the duplicate values. I want to remove all of the same values in the specific column.

Say part of my input data is like this example:
Code:
M1 1 2345
M3 1 2345
M4 1 3456
M5 2 456
M6 2 5678
M7 2 5678
M8 2 7889

my desire output is:
Code:
M4 1 3456
M5 2 456
M8 2 7889

Thanks in advance

Sajmar
 

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CYR_EXPIRE(8)						      System Manager's Manual						     CYR_EXPIRE(8)

 *

NAME
cyr_expire - expire messages and duplicate delivery database entries SYNOPSIS
cyr_expire [ -C config-file ] [ -D delete-days ] -E expire-duration [ -X expunge-days ] [ -p mailbox-prefix ] [ -v ] DESCRIPTION
Cyr_expire is used to expire messages and duplicate delivery database entries. Cyr_expire also cleanses mailboxes of partially expunged messages (when using the "delayed" expunge mode). The expiration of messages is controlled by the /vendor/cmu/cyrus-imapd/expire mailbox annotation which specifies the age (in days) of messages in the given mailbox that should be deleted. Any duplicate delivery database entries which correspond to the mailbox are also deleted at the same frequency. The value of the /vendor/cmu/cyrus-imapd/expire annotation is inherited by all children of the given mailbox, so an entire mailbox tree can be expired by seting a single annotation on the root of that tree. If a mailbox does not have a /vendor/cmu/cyrus-imapd/expire annotation set on it (or does not inherit one), then no messages are expired from the mailbox. Cyr_expire reads its configuration options out of the imapd.conf(5) file unless specified otherwise by -C. OPTIONS
-C config-file Read configuration options from config-file. -D delete-duration Remove previously deleted mailboxes older than delete-duration (when using the "delayed" delete mode). The value can be a floating point number, and may have a suffix to specify the unit of time. If no suffix, the value is number of days. Valid suffixes are d (days), h (hours), m (minutes) and s (seconds). -E expire-duration Prune the duplicate database of entries older than expire-duration. This value is only used for entries which do not have a corre- sponding /vendor/cmu/cyrus-imapd/expire mailbox annotation. Format is the same as delete-duration. -X expunge-duration Expunge previously deleted messages older than expunge-duration (when using the "delayed" expunge mode). Format is the same as delete-duration. -x Do not expunge messages even if using delayed expunge mode (reduces the IO hit considerably, allowing you to run cyr_expire fre- quently to clean up the duplicate database without overloading your server) -p mailbox-prefix Only find mailboxes starting with this prefix. e.g. "user.justgotspammedlots" -v Enable verbose output. -a Skip the annotation lookup, so all /vendor/cmu/cyrus-imapd/expire annotations are ignored entirely. It behaves as if they were not set, so only expire-days is considered for all mailboxes. FILES
/etc/imapd.conf SEE ALSO
imapd.conf(5), cyrmaster(8) CMU
Project Cyrus CYR_EXPIRE(8)
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