## Have a look into an .ipk file (used by the ipkg or opkg manager)

An .ipk file is basically just a .tar.gz file. So you can unpack it using the tar command:

tar xvfz some-package.ipk
# or with newer tar versions:
tar -xf some-package.ipk


Some .ipk files may also be of a different archive format so that you need the following command to unpack:

ar...

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