How to remove lines from a vcf file

Question

[Khaleesi95]

Hi guys, I'm really new to bash. I have a vcf file, and these are the first 37 rows of the file:

##fileformat=VCFv4.2
##FILTER=<ID=PASS,Description="All filters passed">
##fileDate=20230109
##source=PLINKv1.90
##contig=<ID=1,length=248916898>
##contig=<ID=2,length=242078573>
##contig=<ID=3,length=198053357>
##contig=<ID=4,length=189951624>
##contig=<ID=5,length=181263937>
##contig=<ID=6,length=170599915>
##contig=<ID=7,length=159278281>
##contig=<ID=8,length=145067296>
##contig=<ID=9,length=138123972>
##contig=<ID=10,length=133620800>
##contig=<ID=11,length=135031155>
##contig=<ID=12,length=133185624>
##contig=<ID=13,length=114325599>
##contig=<ID=14,length=106879457>
##contig=<ID=15,length=101857170>
##contig=<ID=16,length=90103688>
##contig=<ID=17,length=83089846>
##contig=<ID=18,length=80257298>
##contig=<ID=19,length=58572940>
##contig=<ID=20,length=64281111>
##contig=<ID=21,length=46664836>
##contig=<ID=22,length=50772965>
##INFO=<ID=PR,Number=0,Type=Flag,Description="Provisional reference allele, may not be based on real reference genome">
##INFO=<ID=AC,Number=A,Type=Integer,Description="Allele count in genotypes">
##INFO=<ID=AN,Number=1,Type=Integer,Description="Total number of alleles in called genotypes">
##bcftools_viewVersion=1.15.1+htslib-1.15.1
##bcftools_viewCommand=view -S /data/....
#CHROM  POS     ID      REF     ALT     QUAL    FILTER  INFO
1       843942  1_843942        A       G       .       .       PR;AC=4832;AN=36398
1       864627  1_864627        C       T       .       .       PR;AC=407;AN=36418
1       874496  1_874496        A       G       .       .       PR;AC=4169;AN=36388
1       900119  1_900119        A       G       .       .       PR;AC=8481;AN=36354
1       903352  1_903352        G       A       .       .       PR;AC=1110;AN=36380 

Is it possible to remove the first 31 rows of the files, to get only this:

#CHROM  POS     ID      REF     ALT     QUAL    FILTER  INFO
    1       843942  1_843942        A       G       .       .       PR;AC=4832;AN=36398
    1       864627  1_864627        C       T       .       .       PR;AC=407;AN=36418
    1       874496  1_874496        A       G       .       .       PR;AC=4169;AN=36388
    1       900119  1_900119        A       G       .       .       PR;AC=8481;AN=36354
    1       903352  1_903352        G       A       .       .       PR;AC=1110;AN=36380 

Probably the awk command may work, but I'm really know to the bash language and I'm not sure how to built the command line correctly. Thank you!

Answer 1

[Sej Modha]

If you want to use command-line tools then you could use simple grep:

grep -v '^##' my_file.vcf

[GenoMax]

Resulting file is no longer in VCF format (make a note OP).