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When “Pre-Installed OpenWrt” Isn’t Plug-and-Play

  Lessons Learned After Finally Configuring a Raspberry Pi CM4 Mini Router (Bought in 2022) Product Mini Router built with Raspberry Pi Compute Module 4 Dual Gigabit Ethernet NICs 4GB RAM / 32GB eMMC Pre-installed OpenWrt Compact form factor, fanless, low power Background: A Device That Waited Its Turn I bought this device back in 2022 . At the time, it looked like the perfect small router: Raspberry Pi Compute Module 4 Dual Ethernet ports OpenWrt already installed No SD card required thanks to eMMC But like many homelab projects, it ended up sitting on a shelf . Fast forward to today — with more networking experience, a clearer home network plan, and a real need for a flexible router — I finally decided to configure it properly. That’s when the real journey started. What I Expected (Even in 2025) Even knowing this wasn’t a consumer router, I still expected: Plug WAN into my upstream router Plug LAN into my laptop Access 192.168.1.1 Hav...

Problem solve thanks to askubuntu.com My Sql Update Problem after Update

Hi
Long time ago I haven't write in my blog.
The reason of this post is the fallowing. Last one I update mysql package. Mysteriously is stop working and getting a very nice error.

My sql stop working. ProblemType: Package DistroRelease: Ubuntu 12.04 Package: mysql-server-5.5 5.5.24-0ubuntu0.12.04.1 ProcVersionSignature: Ubuntu 3.2.0-27.43-generic 3.2.21 Uname: Linux 3.2.0-27-generic x86_64 ApportVersion: 2.0.1-0ubuntu12 AptOrdering: mysql-server-5.5: Install mysql-server-5.5: Configure Architecture: amd64 Date: Sun Aug 12 23:44:04 2012 ErrorMessage: el subproceso instalado el script post-installation devolvió el código de salida de error 1

I report it as a bug. When I check the status, I saw it was a duplicate bug, and still no answer. So I decide to use askubuntu.com.  I have never use askubuntu.com, only staroverflow, but just for searching never asking a question and never answering one question.

So at the end, I got my answer.
The solution goes the fallowing way

sudo apt-get purge mysql-server mysql-client mysql-common mysql-client-5.5 mysql-server-5.5
sudo apt-get autoremove
sudo apt-get autoclean

sudo rm -rf /etc/mysql

sudo apt-get install mysql-server mysql-common mysql-client


It was import to to the autoremove and autoclean, because I was having trouble with mysql package.
Want to read the complete answer.

Probably you will wonder, who cares if you solve a problem in askubuntu.com? Well I am just sharing how useful is the ubuntu community. And how they can help you. Many people prefer to stop using an application after one problem, instead of asking for help. If you are like that, you can give a chance to all the help ubuntu provides.


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