How to grep scaffold from the vcf file

Question

[Kumar]

Hi, I have a list of 50 scaffold ids (file1.txt) and another merged file of 90 vcfs (1.4GB) (file2.vcf). I am looking to fetch the scaffolds from the file2.vcf based on the scaffolds id from the file1.txt. Please suggest a script, I am new in writing the python script. I tried the grep command "grep -A 1 -wFf file1.txt file2.vcf > output.vcf", however, I am uncertain that it is correct.

Example:::
file 1:
Scaffold_90832
Scaffold_192565
Scaffold_345678

file 2: a  merged vcf file

Answer 1

[Pierre Lindenbaum]

bcftools view --regions-file file1.txt input.vcf