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Top Forums Shell Programming and Scripting Remove duplicate lines, sort it and save it as file itself Post 302941024 by RudiC on Saturday 11th of April 2015 06:29:42 AM
Old 04-11-2015
We would know the failure reasons even less than you do as we don't see your results as you see them. Why shouldn't head and tail work for you? Did you run them individually, trying to figure out how they work and how they cooperate to give the results you need?

man sort would show you the -u option to keep only unique key values, although it is not guaranteed that those will be the respective first line that occurred. You'd need a compound statement with awk and sort to get what you want.
 

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AXI-CACHE(1)							   User Commands						      AXI-CACHE(1)

NAME
axi-cache - query the Apt Xapian Index SYNOPSIS
axi-cache [options] command [args] DESCRIPTION
Query the Apt Xapian index. Commands: search commands: axi-cache again [query] repeat the last search, possibly adding query terms axi-cache help show a summary of commands axi-cache info print information about the apt-xapian-index environment axi-cache last [count] show the last results again axi-cache more [count] show more terms from the last search axi-cache rdetails pkgname[s] show details of reverse relationships for the given packages axi-cache search [terms] start a new search apt-cache front-ends: axi-cache depends pkgname[s] run apt-cache depends pkgname[s] axi-cache madison pkgname[s] run apt-cache madison pkgname[s] axi-cache policy pkgname[s] run apt-cache policy pkgname[s] axi-cache rdepends pkgname[s] run apt-cache rdepends pkgname[s] axi-cache show pkgname[s] run apt-cache show pkgname[s] axi-cache showpkg pkgname[s] run apt-cache showpkg pkgname[s] axi-cache showsrc pkgname[s] run apt-cache showsrc pkgname[s] OPTIONS
--version show program's version number and exit -h, --help show this help message and exit -s SORT, --sort=SORT sort by the given value, as listed in /var/lib/apt-xapian-index/values. Add a '-' to reverse sort order --tags show matching tags, rather than packages --tabcomplete=TYPE suggest words for tab completion of the current command line (type is 'plain' or 'partial') --last use 'show --last' to limit tab completion to only the packages from the last search results --all disable pagination and always show all results. Note that search results are normally sorted by relevance, so you may find meaning- less results at the end of the output axi-cache 0.45 December 2011 AXI-CACHE(1)
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