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for i inls -d *mcp; do tail -1 "$i" | awk '{ printf "%d %s %s %s\n",NR, $8, $9, $10}' >> ${Pout}${output} doneI get the following output:1 -0.242 125.104 35.0 1 -6.308 151.717 28.1 1 13.764 144.429 130.0 1 -56.022 -27.779 109.3 1 -9.461 156.412 4.0Instead of all ones in the first column I want 1,2,...n. Does that clear things up?ls.for i in `ls -d *mcp`isn’t just inefficient; it produces wrong results if filenames contain certain special characters. (2) Don’t post multi-line commands or output in comments. Clarifications to the question, to include things that you’ve tried, results that you’ve gotten, and results that you want, belong in the question — edit the question to put them there. (3) When you do use command substitution, use$(…)instead of`…`. (4) If you must display a`in code in a comment, type\`.