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Top Forums UNIX for Dummies Questions & Answers Vi delete line with second occurence of pattern Post 302939562 by Don Cragun on Thursday 26th of March 2015 02:36:33 PM
Old 03-26-2015
If there is any chance that the duplicated lines won't be adjacent, awk may be a much better tool for this than vi.

In addition to the misspelling on the last input line; why shouldn't the header line appear in the output? Assuming you do want to keep the header, you could try something like:
Code:
awk 'f[$0]++ == 0' input_file > tmp.$$ && cp tmp.$$ input_file;rm tmp.$$

which, with your sample input, updates your input file to be:
Code:
Time--------FName---------LName
11:05-------John------------Doe
11:06-------Michael---------Lawrence
11:06-------Michale---------Lawrence

If you want to try this on a Solaris/SunOS system, change awk to /usr/xpg4/bin/awk or nawk.
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ucblinks(1B)					     SunOS/BSD Compatibility Package Commands					      ucblinks(1B)

NAME
ucblinks - adds /dev entries to give SunOS 4.x compatible names to SunOS 5.x devices SYNOPSIS
/usr/ucb/ucblinks [-e rulebase] [-r rootdir] DESCRIPTION
ucblinks creates symbolic links under the /dev directory for devices whose SunOS 5.x names differ from their SunOS 4.x names. Where possi- ble, these symbolic links point to the device's SunOS 5.x name rather than to the actual /devices entry. ucblinks does not remove unneeded compatibility links; these must be removed by hand. ucblinks should be called each time the system is reconfiguration-booted, after any new SunOS 5.x links that are needed have been created, since the reconfiguration may have resulted in more compatibility names being needed. In releases prior to SunOS 5.4, ucblinks used a nawk rule-base to construct the SunOS 4.x compatible names. ucblinks no longer uses nawk for the default operation, although nawk rule-bases can still be specifed with the -e option. The nawk rule-base equivalent to the SunOS 5.4 default operation can be found in /usr/ucblib/ucblinks.awk. OPTIONS
-e rulebase Specify rulebase as the file containing nawk(1) pattern-action statements. -r rootdir Specify rootdir as the directory under which dev and devices will be found, rather than the standard root directory /. FILES
/usr/ucblib/ucblinks.awk sample rule-base for compatibility links ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWscpu | +-----------------------------+-----------------------------+ SEE ALSO
devlinks(1M), disks(1M), ports(1M), tapes(1M), attributes(5) SunOS 5.10 13 Apr 1994 ucblinks(1B)
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