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$ /usr/bin/zip -D test1.zip /usr/local/lib/perl5/5.10.1/*.p[ml] adding: ... ... $ md5sum test1.zip test2.zip # just in case cmp is wrong :) aa105cb65d74b31e4da18b2bd1a027d6 test1.zip aa105cb65d74b31e4da18b2bd1a027d6 test2.zip