$ date Thu May 9 09:47:03 MDT 2019 $ TZ=Z date -d '2 hours ago' +%FT%TZ 2019-05-09T13:47:04Z
Thursday, May 9. 2019
Linux 'date'
Sunday, May 5. 2019
eBPF Basics
I saw a pre-release of "Linux Observability with BPF" by David Calavera and Lorenzo Fontana. Well, I'd say it is a release prior to pre-release. Some good information it has, but teases the details.
This post is about what it takes to get the first example functional: the things I saw, didn't see, and kludges I put in place. With the understanding and first step in place, it can be cleaned up and additional progress can be now proceed.
I have a mixed Debian Buster/Testing/Sid workstation installation. A messy system due to the vagaries of getting Linux Stretch/Buster installed onto a new Intel NUC nuc8i7hvk01 when firmware and display drivers were just getting rolled out. Kernel updates have made progress. Given the inclination, a nice simple clean Buster rebuild will probably work this time around.
But enough of that. Here is what I needed to do for building a simple eBPF program, building a simple installer, and getting it to install, pass the verifier, and achieve a successful conclusion. Continue reading "eBPF Basics" »
Saturday, May 4. 2019
Firefox Intermediate Certificate Issues
It seems that in the last day or so, Mozilla forgot to renew an intermediate certificate in their FireFox browser. The result is that the browser has mass-disabled add-ons.
One temporary solution someone mentioned (which may only work on a Dev version, and/or Linux version):
Simple temporary fix is to browse to "about:config" and change the value for "xpinstall.signatures.required" to false. Well, that worked for me, anyway. When Mozilla fixes whatever the issue is, I'll set it back to true.
The 'studies based' alternate solution:
You can turn on the Studies option under Privacy & Security for a little while, then check about:studies and you should see one or two in there regarding the xpi verification/signing. Once you have those two studies, you can disable Studies again.
Mozilla has an Update Regarding Add-ons in Firefox, but does not apply to Firefox ESR (my Debian Linux install) or FireFox for Android.
Another link about resolution: Certificate issue causing add-ons to be disabled or fail to install