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* grub-core/commands/lsmmap.c: Likewise. * grub-core/commands/minicmd.c: Likewise. * grub-core/commands/mips/loongson/lsspd.c: Likewise. * grub-core/commands/regexp.c: Likewise. * grub-core/gdb/gdb.c: Likewise. * grub-core/term/gfxterm.c: Likewise. * util/grub-mkconfig.in: Likewise. * util/grub-mkfont.c: Likewise. * util/grub-mklayout.c: Likewise. * util/grub-mknetdir.in: Likewise. * util/grub-mkrescue.in: Likewise. * util/grub.d/30_os-prober.in: Likewise.
All executable files in this directory are processed in shell expansion order. 00_*: Reserved for 00_header. 10_*: Native boot entries. 20_*: Third party apps (e.g. memtest86+). The number namespace in-between is configurable by system installer and/or administrator. For example, you can add an entry to boot another OS as 01_otheros, 11_otheros, etc, depending on the position you want it to occupy in the menu; and then adjust the default setting via /etc/default/grub.