如下所示，os-prober 没有检测到 Fedora（即使我当前已启动到 Fedora！）
$ sudo os-prober
/dev/mapper/vgubuntu-Data:Ubuntu 22.10 (22.10):Ubuntu:linux
File descriptor 3 (/dev/pts/0) leaked on vgs invocation. Parent PID 22190: grub2-probe
File descriptor 9 (pipe:[188726]) leaked on vgs invocation. Parent PID 22190: grub2-probe
File descriptor 3 (/dev/pts/0) leaked on vgs invocation. Parent PID 22190: grub2-probe
File descriptor 9 (pipe:[188726]) leaked on vgs invocation. Parent PID 22190: grub2-probe
File descriptor 3 (/dev/pts/0) leaked on vgs invocation. Parent PID 22244: grub2-probe
File descriptor 9 (pipe:[188726]) leaked on vgs invocation. Parent PID 22244: grub2-probe
File descriptor 3 (/dev/pts/0) leaked on vgs invocation. Parent PID 22244: grub2-probe
File descriptor 9 (pipe:[188726]) leaked on vgs invocation. Parent PID 22244: grub2-probe
/dev/mapper/vgubuntu-UbuntuRoot:Ubuntu 23.04 (23.04):Ubuntu1:linux
[root@lamyer EFI]# sudo grub2-mkconfig -o "/boot/grub2/grub2-efi.cfg"
Generating grub configuration file ...
File descriptor 3 (pipe:[207085]) leaked on vgs invocation. Parent PID 27412: grub2-probe
File descriptor 9 (pipe:[205344]) leaked on vgs invocation. Parent PID 27412: grub2-probe
File descriptor 3 (pipe:[207085]) leaked on vgs invocation. Parent PID 27412: grub2-probe
File descriptor 9 (pipe:[205344]) leaked on vgs invocation. Parent PID 27412: grub2-probe
File descriptor 3 (pipe:[207085]) leaked on vgs invocation. Parent PID 27474: grub2-probe
File descriptor 9 (pipe:[205344]) leaked on vgs invocation. Parent PID 27474: grub2-probe
File descriptor 3 (pipe:[207085]) leaked on vgs invocation. Parent PID 27474: grub2-probe
File descriptor 9 (pipe:[205344]) leaked on vgs invocation. Parent PID 27474: grub2-probe
Found Ubuntu 22.10 (22.10) on /dev/mapper/vgubuntu-Data
Found Ubuntu 23.04 (23.04) on /dev/mapper/vgubuntu-UbuntuRoot
Adding boot menu entry for UEFI Firmware Settings ...
done