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Taking what you already have:


$ ls *.dat.old | sed 'p;s/.dat.old/_N.dat/' | xargs -n2 mv

for file in *.dat.old
do
mv "$file" "${file%.dat.old}_N.dat"
done

Hi,

Test this solution. The last character is '*', witch selects all files in the directory where you run the script.

$ perl -e 'while (@ARGV) { ($param = $ARGV[0]) =~ s/(.*)\..*/\1/ ; print...