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cat awk '{print}'cat -s awk '{blank = NF == 0 ? ++blank : 0; if (blank <= 1) print;}'tac awk '{t[NR] = $0;}END{for (i = NR; i >= 1; i--) print t[i];}'grep patten awk '/patten/{print}'grep -v patten awk '! /patten/{print}'head awk 'NR <= 10 {print}' 24.shhead -1 awk '{print; exit; }' 24.shtail awk '{t[n++ % 10] = $0}END{for (i = 0; i < 10; i++) print t[n++ % 10];}'tail -1 awk '{t = $0}END{print t}'cut -c 10 awk '{print substr($0, 10, 1)}'cut -d: -f4 awk -F: '{if (NF > 1) print $4; else print;}'tr A-Z a-z awk '{print tolower($0);}' se.shtr a-z A-Z awk '{print toupper($0);}' se.shtr -s ' ' awk '{print gensub(" +", " ", "g")}'tr -d '/012' awk '{printf "%s", $0}'wc -l awk 'END{printf "% 7d/n", NR-1}'uniq awk '{if (NR == 1 || ln != $0) print; ln = $0;}'rev awk '{l = ""; for (i = length($0); i > 0; i--) printf "%c", substr($0, i, 1); print "";}'basename awk -F'/' '{print $NF}'dirname awk -F'/' '{if (NF <= 1) printf "."; else {OFS="/"; $NF=""; printf "%s", substr($0, 1, length($0) - 1);}}'xargs awk '{printf "%s ", $0}END{print}'paste -sd: awk 'NR > 1{printf ":%s", $0}'cat -n awk '{printf "% 6d %s/n", NR, $0}'grep -n awk '/ss/{print NR":"$0}'cp orig new awk '{print > "new"}' orig
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