
Originally Posted by
Flika
I just installed KL on my USB drive with persistence. However, I used an old version ISO I had on my laptop, because the hard drive on that laptop is incredibly slow and I didn't want to spend an hour and a half downloading the latest ISO. So I used the old one, version 2017.3, thinking I could just update it when I got it up and running. I get on and try to use the apt-get update commands, and get the following output:
Code:
Get:1 http://archive.linux.duke.edu/kalilinux/kali kali-rolling InRelease [30.5 kB]
Err:1 http://archive.linux.duke.edu/kalilinux/kali kali-rolling InRelease
The following signatures were invalid: EXPKEYSIG ED444FF07D8D0BF6 Kali Linux Repository <[email protected]>
Fetched 30.5 kB in 0s (44.8 kB/s)
Reading package lists... Done
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://archive.linux.duke.edu/kalilinux/kali kali-rolling InRelease: The following signatures were invalid: EXPKEYSIG ED444FF07D8D0BF6 Kali Linux Repository <[email protected]>
W: Failed to fetch http://http.kali.org/kali/dists/kali-rolling/InRelease The following signatures were invalid: EXPKEYSIG ED444FF07D8D0BF6 Kali Linux Repository <[email protected]>
W: Some index files failed to download. They have been ignored, or old ones used instead.
I updated the sources.list file with the "regular repositories" link on the official site:
https://docs.kali.org/general-use/ka...t-repositories But still got the error. I don't know what is causing it, and need some help getting it resolved. Thanks!

I think what your looking for gos like this
apt-key adv --keyserver hkp://keys.gnupg.net --recv-keys 7D8D0BF6
If it still not work
apt-key list
Then try all the expired ones, sometimes the order you try to update them is essential.
easy to start; hard to finish