while also on linux platform: mtxrun --script font --list --spec --filter="fontname=ibm*" mtxrun --script font --list --spec --filter="fontname=ple*" give correct result (as in listing the available installed ibmplex fonts) mtxrun --script font --list --spec --filter="fontname=*" mtxrun --script font --list --spec --filter="fontname=p*" mtxrun --script font --list --spec --filter="fontname=pl*" lua error : function call: /home/vm/context/tex/texmf-linux-64/bin/mtxrun.lua:10080: bad argument #9 to 'format' (number expected, got string) apparently you need at least three characters in the the filter template. $ mtxrun --script font --list --spec --filter="fontname=ple" table: 0x3bc80550ac0 table: 0x3bc80550b00 [01:32] vm @ vmz: ~ $ mtxrun --script font --list --spec --filter="fontname=ibm" table: 0x51012550ac0 table: 0x51012550b00