From charlesreid1

opkg is the package manager for OpenWrt (runs on Widy and Dropbear)

ipk files

To install software with opkg, it must be bundled in an ipk file

Info in this SO thread on how to create a package (e.g., a bundle of Python scripts): https://stackoverflow.com/questions/17369127/extracting-and-creating-ipk-files

bundling

opkg can also do more complicated things like bundling packages and source code and configurations together.

PirateBox is a good example of this: https://www.disk91.com/2012/technology/systems/installation-of-a-piratebox-on-t-link-mr3040/

In the end you'll execute commands to download your ipk and then install it with opkg, like this:

wget http://piratebox.aod-rpg.de/piratebox_0.5.1_all.ipk
opkg update && opkg install piratebox*

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