Remove Whitespace Perl

Remove all whitespace from file

perl -lape ‘s/\s+//sg’ INPUT.TXT > OUTPUT.TXT

Remove whitespace more than one space

perl -wlpe ‘~ s/ +/ /g’ INPUT.TXT > OUTPUT.TXT

Remove whitespace more than one space and replace with ‘_’ character

perl -wlpe ‘~ s/ +/_/g’ INPUT.TXT > OUTPUT.TXT

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