Using sort or uniq

[zqadora]

Hello,

I have file in which each line contains 8 fields. I need to get unique lines only if it unique in the last 3 fields. What is the command needed using uniq or sort.

Regards
ZQ

 

[zqadora]

One more note, the field are seperated by commas.

 

[stefanwagner]

Do you like to get only the last 3 fields, or the whole lines?

rev reverts lines, so you could use rev, sed, uniq:

rev file | sed 's/\([^,]*,[^,]*,[^,]*\).*/\1/g' | sort -u | rev

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[SamBones]

Try this...

sort -u -t , -k 6,8 oldfile.dat > newfile.dat

See the [tt]man[/tt] page for explanation and more info.

Hope this helps.