Author: Jay Forrest

The warning “EFI stub: WARNING: Failed to measure data for event 1: 0x800000000000000b” during Linux Mint boot is a Secure Boot / kernel‑measurement issue that has been appearing across Mint, Ubuntu, Kubuntu, and SuSE systems since 2023. The good news: your system is not damaged, and the boot continues normally. The warning indicates that the EFI stub attempted to measure boot data for TPM/Secure Boot logging and failed.

The most common and confirmed cause is having too many installed kernels.
Multiple independent reports show the warning disappears immediately after removing old kernels.

Then remove old ones using Update Manager → View → Linux kernels.

To fully and permanently disable the Jetpack AI features, you can add the following code snippet to your site using a plugin like Code Snippets:

add_filter( 'jetpack_ai_enabled', '__return_false' );

Once that’s in place, Jetpack AI will be completely disabled across your site.

Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/c/cifs-utils/cifs-utils_7.0-2ubuntu0.3_amd64.deb 404 Not Found [IP: 2606:4700:10::6814:1cf6 80]

How to fix

Update Your Repository List

Run the below command to clean cache and update the list of available packages:

sudo apt clean -y
sudo apt update -y

Then use the Update Manager, reresh it, and try installing again.

This fixed it for me.

In one of the first disappointments with Linux Mint, their new menu sucks. It doesn’t look good. It is functional, but ugly.

The Old Menu

The original was much better!

WordPress sites are under attack all the time. I have found three free plugins that help me protect my WordPress website. I add a fourth bonus plugin.

The first is “Wordfence Security.” It is an does basic monitoring, blocking, and anti-virus, Firewall and Malware Scan.
https://www.wordfence.com/

Second is “Hide My WP Ghost Lite.” This hides WP CMS, 7G/8G Firewall, Brute Force Protection, 2FA, GEO Security, Temporary Logins, Alerts & more.
https://hidemywpghost.com/.

Third is “IP2Location Country Blocker.” Block visitors from accessing your website or admin area by their country.
https://www.ip2location.com/

Fourth, is “JetPack.” In setting under the Security tab I enable Firewall and Brute force protection. I use the plugin for other reasons, so it is not essential for security.
https://jetpack.com/

Google search has gotten worse over the years. You are not imagining it, it’s true. So I have decided to switch to Brave Search.

But, since I am switching, I thought I would give the Brave Browser a spin. And I thought, maybe others would be interested as well. So here is how to install it on Linux Mint. Directions for other distros is provided on their page.

Debian, Ubuntu, Mint 

Copy and paste these lines in the terminal, one by one, hitting enter each time. Enter your password, do the next line. After you are done, you will find it in your Menu under Internet.

sudo apt install curl

sudo curl -fsSLo /usr/share/keyrings/brave-browser-archive-keyring.gpg https://brave-browser-apt-release.s3.brave.com/brave-browser-archive-keyring.gpg

echo "deb [signed-by=/usr/share/keyrings/brave-browser-archive-keyring.gpg] https://brave-browser-apt-release.s3.brave.com/ stable main"|sudo tee /etc/apt/sources.list.d/brave-browser-release.list

sudo apt update

sudo apt install brave-browser

To add Brave Search to Google Chrome:

https://search.brave.com/default

In Linux Mint 22 the Ubuntu font was updated to a thinner version. I don’t like it. So here is how to return to the wider and thicker classic Ubuntu font.

Install the fonts-Ubuntu-classic package.

You will need to reboot, all your lettering will be messed up. Open your menu after you install the font and you will understand.

Now you have to lock the font in Synaptic Package Manager.

Search for “font-ubuntu-classic”.
Highlight it
Click on Package from the above menu, and select “lock version”.
It will turn red once it is locked.

You are go to go.

Visual Link: https://www.youtube.com/watch?v=_qZI6i21jB4&t=1086s