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Cake day: June 17th, 2023

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  • Lots of SaaS business models adopt this hyper revenue growth, but cash flow negative, unprofitable model. However this business model was only possible with a low interest rate environment of the past 15 years. It was relatively easy to get approved for loans and venture capital funding.

    Think of companies like Uber and AirBnB. Their mission is to undercut their competition and be unprofitable until they become a monopoly. Once they get monopoly market share, they will try to show pricing power and raise prices on their consumers once there is no competition.

    Compare that to Google or Facebook, who have always been profitable.

    Interest rates are higher now so it is becoming more difficult to get cheap loans and fundraising. It will be interesting to see how this unprofitable model will survive or not.










  • The Ubuntu based distros may have this phased update thing. That AskUbuntu link has a command to override APT package manager to install the held-back packages.

    Ubuntu tends to hold back system critical packages in case there are issues. Systems with certain install UUIDs will be ‘guinea pigs’ and install these packages before everyone else. You can override this behavior and disable phased updates on that particular computer.






  • That just means the TPM will not auto unlock the encrypted disk. You would have to unlock with whatever LUKS password (or key file) you set for that drive. There is optionally a TPM master key you can export that is similar to the Microsoft Bitlocker password (40 digit number iirc), that Lennart mentioned in his blog. If you deleted any other key slots and do not have that TPM master key, you will not be able to unlock the LUKS drive.

    If you look at that freedesktop manpage I linked, it states some of the PCR values and what each one measures. When you enroll a PCR, that value is stored in the TPM. If anything differs between the system and the TPM, the TPM will refuse to unlock that encrypted drive.

    For example, PCR 0 measures your motherboard UEFI firmware. If you update the firmware, the TPM will not unlock your LUKS drive until you re-enroll the drive once again. Is is a personal choice, but enrolling certain PCR into the TPM can be more inconvenient.