diff --git a/docs/index.md b/docs/index.md
index 9fc1029..31d25fe 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -90,7 +90,7 @@ board but they should at least provide these guarantees.
 [Raspberry Pi OS] (formerly "Raspian Buster") is the current latest recommended
 version of the standard Raspberry Pi operating system. [Etcher] is a useful and
 simple tool for flashing the operating system onto the SD card which you will
-plug into your Raspberry Pi. You can also use the ["dd" command].
+plug into your Raspberry Pi. You can also use the [`dd` command].
 
 Here is the `dd` command we use:
 
@@ -104,7 +104,7 @@ $ sudo dd bs=4M if=2020-08-20-raspios-buster-armhf-lite.img of=<YOUR-DEVICE-HERE
 [raspberry pi 3 b+]: https://www.raspberrypi.org/products/raspberry-pi-3-model-b/
 [raspberry pi os]: https://www.raspberrypi.org/documentation/raspbian/
 [etcher]: https://www.balena.io/etcher/
-["dd" command]: https://www.raspberrypi.org/documentation/installation/installing-images/linux.md
+[`dd` command]: https://www.raspberrypi.org/documentation/installation/installing-images/linux.md
 
 ## Pre-installation
 
@@ -432,10 +432,15 @@ all the system adminstration work.
 
 Download
 [bibliotecha.img](https://manual.bibliotecha.info/files/bibliotecha.img). It is
-32 GBs in size, so it could take some time!
+32 GBs in size, so it could take some time! Then unzip the file with the following command.
+
+```bash
+$ tar cvzf bibliotecha.tar
+```
 
 Plug in your own SD-card into your laptop. Run the `lsblk` command and take
-note of the path available for the card (e.g. `/dev/mmcblk0`).
+note of the path available for the card (e.g. `/dev/mmcblk0`). See the [`dd`
+documentation] for more help.
 
 Start copying the image onto your SD-card with the `dd` command.
 
@@ -457,6 +462,8 @@ You can now follow the [post-installation] steps but please note, you will
 **not** be required to configure the Calibre-web installation because it is
 already done!
 
+[`dd` documentation]: https://www.raspberrypi.org/documentation/installation/installing-images/linux.md
+
 ## Manual installation
 
 It is possible to install Bibliotecha manually. This can be useful and fun if