http://qs321.pair.com?node_id=1213122


in reply to Re^4: Splitting a large file into smaller files according to indexes
in thread Splitting a large file into smaller files according to indexes

Many links out there, e.g. Evade the macOS 'Too Many Open Files' Error by Pushing the Limits

perl -le'print map{pack c,($-++?1:13)+ord}split//,ESEL'