add dvi optimization

profile/airootfs/root/post_install.sh

@@ -33,7 +33,7 @@ log "installing virtualbox guest additions"
     echo "
         cd /mnt/cdrom
         echo yes | sudo ./VBoxLinuxAdditions.run
-    " | arch-chroot -u user "$ROOT"
+    " | arch-chroot -u user "$ROOT" || true # will fail to reload modules since running in a chroot, but installation still successful
 
 
 log "installing paru"
@@ -94,3 +94,10 @@ log "configuring home"
         do code --install-extension $ext
         done
     ' | arch-chroot -u user "$ROOT"
+
+
+log "optimizing drive"
+    umount "$ROOT/mnt/crdom"
+    umount "$ROOT/boot"
+    umount "$ROOT"
+    zerofree -v /dev/sda2 # note : sda2 is the 20Gb drive, sda1 is the boot partition