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df -k | perl -ne '/(\d{1,3})%/; print "$1\n"'
perl -0pe'$_=()=/\.at/g' filename
perl -pi.bak -e 's/-lapreq//' Request/Makefile.PL Cookie/Makefile.PL
tasklist | perl -ne "if (/notepad/i) {@a=split(' ', $_); system('taskkill /PID '.$a[1])}"
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