Hi all, i want to listing the file group by file extenstion (type) i have 4 .csh and 2 .txt and 3 csv file in my current dirm i want to know only the type of file extenstion like this csh txt csv i tired one command but its listing all file type. not listing uniq records $ ls -rtl | awk '{ print $8 }' | awk -F"." '{print $NF}' | uniq -u pls help on this.

I think you have your field count wrong and you probably do not want the -u flag on uniq: ls -rtl | awk '{ print $9 }' | awk -F"." '{print $NF}' | uniq But I don't see why you need to do a long listing: ls -rt1 | awk -F"." '{print $NF}' | uniq Above, that is a "1" - not an "l"

Nail, the above command is working but it returning duplicate values also Let me take my example: my folder has totally 38 files, in that 28 perl files and 10 txt file are there If i execute your command its returning pl txt pl txt pl txt But i want the output like this pl txt Thanks

Thanks Nails, i tried your command with sort command its working, see the below command and output $ ls -rt1 | awk -F"." '{print $NF}' | sort | uniq output: pl txt Thanks

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