/Shell/Bash/Bash add chr to beginning of vcf

Bash add chr to beginning of vcf

# Example usage:
awk '{if($0 !~ /^#/) print "chr"$0; else print $0}' input.vcf
# This converts a vcf file with numeric genome coordinates to one with 
# chr in front of the chromosome number. 

# Note, this command does the opposite operation, if needed:
awk '{gsub(/^chr/,""); print}' input.vcf

Source: biostars.org

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