解决Can't open /usr/lib/grub/update-grub_lib

运行命令

cat <<\EOF | sudo tee /usr/lib/grub/update-grub_lib
prefix="/usr"
exec_prefix="${prefix}"
datarootdir="${prefix}/share"
. "${datarootdir}/grub/grub-mkconfig_lib"
grub_warn "update-grub_lib is deprecated, use grub-mkconfig_lib instead"
EOF

sudo chmod +x /usr/lib/grub/update-grub_lib