awk 'BEGIN {n_seq=0; } /^>/ {if(n_seq%10000==0) { file=sprintf("File_%d.fa, n_seq/10000); } print >> file; n_seq++; next; } {print >> file;}' < /bioinf/projects/megx/UNKNOWNS/CLUSTERS/TARA_OSD_GOS.orf.aa.pfam27.nohit.90.80.60.30