• in Linux
  • 2 min read

Getting the HP USB-C/A Universal Dock G2 working with Fedora 41

I have a HP Elitebook 840 G7 that I use along with a HP USB-C/A Universal Dock G2. Now, this has been working fine in Windows, but when I changed to Fedora, not so much. I had to plug in my HDMI cable directly to the laptop, and not the docking station. It just wasn't working. This is what I did to fix the issue.

  • in Snippets
  • 1 min read

while read

More than once I find myself opening a file with vim, pasting the contents, saving the file, and then going back to bash to do some magic with it. With this line, you simply run the command, paste in the contents that you want, and end with EOF to end the loop. In this case, I paste in a list of URLs, but only want to grab those that contain the string 'https':

  • in Snippets
  • 1 min read

Retain X amount of files

I encountered an issue today where someone requested that we keep the 10 newest backup files, while the rest of them (the oldest) were deleted. So I made this little script:

#!/bin/bash

FILE_DIR="/home/jorge/backup/"
NUMBER_OF_FILES="$(ls -t $FILE_DIR | wc -l)"
RETAIN=10

if [ "$NUMBER_OF_FILES" -ge "$RETAIN" ]; then
    cd $FILE_DIR
    ls -t | sed -e "1,$RETAIN d" | xargs rm -f
fi

This can be modified to match with any type of file or filename.

  • in Linux
  • 6 min read

Introduction to tmux

I have been working with Linux for years, and I've always used screen when working in the terminal. I even wrote a small introduction to screen over 10 years ago.

So you can imagine my surprise when I at a very late point found out about tmux. It has completely changed the way I work, and boy do I love it.

  • in Snippets
  • 1 min read

Delete files between two dates

To delete all files in a directory, between two dates, use the find command:

find /path/to/dir/ -type f -newermt 2022-01-01 \! -newermt 2023-01-01 -exec rm -fv '{}' +
  • in Snippets
  • 1 min read

Scan for newly added disks

To scan for newly added/modified disks, run the following command as root:

for f in /sys/class/scsci_host/*; do echo "---" > $f/scan; done
  • in Linux
  • 8 min read

Ansible EX294 practice exam and solutions

I am hopefully going to take the second half of my RHCE exam this year, which is EX294. I have taken inspiration from and , and have decided to provide my own answers and explanations as I myself prepare for the exam.

I’ve also only used 4 VM’s in total, 1 controller and 3 nodes, and not 4 nodes as the practice exam suggests.

Here are the tips that I’ve found helpful so far: