dpkg -L initramfs-tools | grep etc
/etc
/etc/initramfs-tools
/etc/initramfs-tools/scripts
/etc/initramfs-tools/scripts/init-bottom
/etc/initramfs-tools/scripts/init-premount
/etc/initramfs-tools/scripts/init-top
/etc/initramfs-tools/scripts/local-bottom
/etc/initramfs-tools/scripts/local-premount
/etc/initramfs-tools/scripts/local-top
/etc/initramfs-tools/scripts/nfs-bottom
/etc/initramfs-tools/scripts/nfs-premount
/etc/initramfs-tools/scripts/nfs-top
/etc/initramfs-tools/hooks
/etc/initramfs-tools/conf.d
/etc/initramfs-tools/initramfs.conf