How do I mount, edit and repack an .img file?

Question

I have downloaded a .img file to use on my Android device.

I have to edit a file in the image in order to use it.

How can I mount the file so I can edit the text file and then re-pack the .img?

Solution

Did you try the standard o loop mount?

mount -o loop file.img /mnt/img

then edit and unmount normally

umount /mnt/img/

Comments

[Johan Larsson]

I have now, and I get 'mount: you must specify the filesystem type ' in return.

[enzotib]

@Rasmus: it is a partition or disk image? In the second case you need to use an appropriate offset in -o loop,offset=NUMBER.

[Csabi Vidó]

@Rasmus Since your question seems to be about Android images, it may be a bit more difficult, you you would probably need to unpack and repack the whole image again. askubuntu.com/a/129388/40581

[Suuuehgi]

If your image contains multiple partitions, you have to set an offset-value as explained here.