Как я могу поделиться ссылками на альбом в музыкальном магазине U1?

Как насчет этого?

$ awk -F'[ .]' 'NR==FNR{a[$0]; next}/^>/{p=$2 in a}p' file1 file2
> AAX50250.1 cds:annotated chromosome:ASM1212v1:Chromosome:1:1770:1 gene:CTA_0001.1 gene_biotype:protein_coding transcript_biotype:protein_coding description:hypothetical protein
ATGAGCATCAGGGGAGTAGGAGGCAACGGGAATAGTCGAATCCCTTCTCATAATGGGGAT
GGATCGAATCGCAGAAGTCAAAATACGAAGAATAAAGTTGAAGATCGAGTTCGTTCTCTA
TATTCATCTCGTAGTAACGAAAATAGAGAATCTCCTTATGCAGTAGTAGACGTCAGCTCT
> AAX50251.1 cds:annotated chromosome:ASM1212v1:Chromosome:1915:2187:-1 gene:CTA_0002.1 gene_biotype:protein_coding transcript_biotype:protein_coding description:hypothetical membrane associated protein
ATGCTTTGTAAAGTTTGTAGAGGATTATCTTCTCTTATTGTTGTTCTCGGAGCTATAAAC
ACTGGAATTTTAGGAGTAACAGGGTATAAGGTAAACCTACTTACTCACCTGCTTGGTGAA
GGAACCATGTGGACACAAGCAGCTTATGTAGTAACGGGAATCGCTGGGGTTATGGTCTGC
> AAX50252.1 cds:annotated chromosome:ASM1212v1:Chromosome:2388:2690:1 gene:CTA_0003.1 gene_biotype:protein_coding transcript_biotype:protein_coding gene_symbol:gatC description:glutamyl-tRNA(Gln) amidotransferase subunit C
ATGACAGAGTCATATGTAAACAAAGAAGAAATCATCTCTTTAGCAAAGAATGCTGCATTG
GAGTTGGAAGATGCCCACGTGGAAGAGTTCGTAACATCTATGAATGACGTCATTGCTTTA
ATGCAGGAAGTAATCGCGATAGATATTTCGGATATCATTCTTGAAGCTACAGTGCATCAT
TTCGTTGGTCCAGAGGATCTTAGAGAAGACATGGTGACTTCGGATTTTACTCAAGAAGAA
TAG

Сценарий выше можно развернуть до:

awk -F'[ .]' '       # set the field separator to space or dot
        NR == FNR {  # for the lines of the first file
            a[$0]    # Store the line in an array
            next     # And skip to the next record
        }
        /^>/{        # For lines of the second file starting with `>`
            p = $2 in a # Set flag to true if index is present in array
        }
        p            # print line if flag is set
      ' file1 file2