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  1. or download this
    # Choose first N FASTA records
perl -ne 'BEGIN {$/=">";$o=0}{chomp;$o<N?(/^$/?next:print">$_"):last;$
+o++}' EXAMPLE.fa
  2. or download this
     perl -ne 'BEGIN{$/=">";$o=0}{chomp;$o<22?(/^$/?next:print">$_"):last;
+$o++}' b4x_est100.fa # print the first 22 records