There's probably a GRUB-specific mailing list or forum, but I thought I would try here first ... GRUB has a DSL ( https://en.wikipedia.org/wiki/Domain-specific_language ) that looks a lot like shell scripting. Most people never see it as it's used to generate the menus we use at boot-time and they see only the menus, but it can do some interesting things - particularly when you're dealing with multi-boot USB sticks. Here's a simple but slightly useful example: function cpuinfo { # only able to determine: 32/64 bit, and is it PAE echo "GRUB's ability to analyse processors is limited, we can only tell you:" if cpuid -p; then pae_assessment="PAE" else pae_assessment="NO PAE" fi if cpuid -l; then echo "64-bit processor, $pae_assessment" else echo "32-bit processor, $pae_assessment" fi } But it has some nasty limitations that are frustrating me: - no pipes - no command substitution - no file globbing That last in particular is really getting on my nerves. I want to source all the files in one folder, but I can't say 'for file in folder/* ; do' because the '*' is a literal character, no special meaning. Likewise, I can't say 'for file in `ls folder/` ; do' because there's no command substitution. I was wondering if anyone knows of a solution to this problem. Or even if you have ideas from long-gone old shells with similar limitations for which someone worked out a nasty work-around ... What I've been doing is 'for file in name1 name2 name3 ... ; do', but of course this only works if you remember to add new filenames to the list. I've googled quite a bit, but most people only modify GRUB through /etc/default/grub or, if they're really adventurous, through /etc/grub.d/40_custom or similar. What I'm looking for is (mostly) at a lower level than that, and examples are surprisingly hard to come by. And search results are occasionally polluted by GRUB4DOS results ... GRUB4DOS _does_ seem to support file globbing. All very confusing. Thanks. -- Giles https://www.gilesorr.com/ gilesorr@gmail.com