how to change the gene header names in a fasta file?

Question

[rj.rezwan]

Hi, I want to replace the gene_ids with new ids of some selected genes in a large fasta file. How can I do this?

old  new
gene_1 sg1.1
gene_10 sg10.6
gene_20 sg20.8

[GenoMax]

See seqkit solution : Renaming fasta headers according to a matching name list