This one was tricky, I was reading the ‘official’ Docker docs on how to install Docker on Debian 13 and it didn’t work for me. After many tries I decided to take a walk and see some Halloween decorations in NYC. When I came back I started doing some more research about installing how to …
Author Archives: rgm
Connect to Exchange Online using PowerShell
This one was a new experience for me. After brewing a good cup of Caturra variety coffee at home, a friend contacted me wanting to connect to Exchange online using PowerShell. This was due to some strange email activity with one of her users. Connecting to Exchange Online using PowerShell allows administrators to manage Exchange …
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sss_cache sysdb_domain_cache_connect: DB version too old
I got this error sss_cache when trying to add a new user to one of my clients Linux (RedHat 8.10) box. I have never encounter this issue before at any Linux distro I have touched. After brewing a good cup of Caturra coffee variety from my friend’s coffee farm in Chiriqui, Panama I found the …
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What Are Bash Special Parameters?
What are Bash special parameters is a topic I have been running away from for a while. Not anymore! I finally started getting more into bash scripting basics. Special parameters are predefined variables that Bash automatically creates. You don’t assign values to them. This was something new to me. So, after brewing a good cup …
What Are The CTRL Commands In Linux
I recently discover more about the CTRL commands options in Linux. I have to admit, this is something I should have learnt many years ago. I have been using some of these CTRL commands for a while without noticing what they really meant. So, I decided to create this short Linux terminal tutorial for future …
Best Cafes in NYC for Remote Work During World Cup 2026
If you’re coming to New York City for the FIFA World Cup 2026 and still need to get work done, you’re not alone. I’ve worked remotely across this city for years, and I know exactly what you need. You want great coffee, reliable WiFi, enough space to focus, and easy subway access so you don’t …
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Edit DNS Settings Using macOS Terminal
I was surprised how easy is to edit DNS Settings using the macOS Terminal. I also noticed using the GUI in the mac sometimes doesn’t ‘keep’ the settings for some reason. After I visited one of my favorite local beer breweries in Brooklyn one of my clients contacted me. The issue was setting up a …
How to remove snap and snap packages in Ubuntu
I needed to find how to remove snap and all those packages from my vintage Ubuntu laptop. It all started after trying to boot up and getting the ‘frozen’ Ubuntu logo at boot time. After brewing a nice Catimor coffee at home I discovered there was little storage space left. Why!?? My laptop was turned …
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Using the xargs command in Linux
I have been reviewing some useful commands in Linux during the holidays. Using the xargs command in Linux is one of them. Here are some sysadmin-style examples, simple and useful. Before, writing this I brewed coffee at home using my french press. Coffee inspires me. The xargs command receives input from another command. In simple …
sed command regex s/ option
The sed command is one of those commands I have never put enough attention in Linux. A mistake! The sed command (Stream Editor) is a very powerful one to know. It is used to find and replace text patterns. Sed command standard sysntax To replace all instances of Paco with Timo in a file.txt: s/ …