/usr/share/initramfs-tools/scripts/init-premount/ is in brltty 5.5-4ubuntu2.
This file is owned by root:root, with mode 0o755.
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    /usr/share/initramfs-tools/scripts/init-premount/brltty
    
        
    
 | text/x-shellscript | root:root | 0o755 | 254 bytes |