Is There A Command I Can Use To Sign My Modified Apk On The Command Line In Linux?

I have an apk file that I built using Adobe Phonegap Build. As described in this question, I have to modify the apk generated by Adobe Phonegap Build before uploading it to the Goo

Solution 1:

For this you use standard Java SE tools: jarsigner and keytool.

From Android documentation on signing:

jarsigner -verbose -sigalg SHA1withRSA -digestalg SHA1 -keystore my-release-key.keystore my_application.apk alias_name

Remember that you should first sign and then align.