https://bioinformaticsonline.com/snippets/view/41986/perl-one-liner-to-print-only-non-uppercase-letters? https://bioinformaticsonline.com/snippets/view/41986/perl-one-liner-to-print-only-non-uppercase-letters Tue, 21 Jul 2020 21:25:33 -0500 https://bioinformaticsonline.com/snippets/view/41986/perl-one-liner-to-print-only-non-uppercase-letters #Go through file and only print words that do not have any uppercase letters. perl -ne 'print unless m/[A-Z]/' dna.fa > dnaOnlyLowercase.fa #To lowercase everything perl -pne 'tr/[A-Z]/[a-z]/' dnaUpperCase.fa >dnawithoutuppercase.fa;]]> BioStar