Dumb Things to Remember

This repository list all the dumb things that I encoutered and must be noted on a notepad (this is actually the notepad)

This must be removed

Docker

DNS

I installed on my server a DNS resolver. The docker engine parameter must be updated to add the ip of the dns server. In the /etc/docker/daemon.json file.

{
  "dns": ["192.168.1.34", "8.8.8.8"]
}

Store the docker images on another partition

Just override the data-root parameter in /etc/docker/daemon.json

{
  "data-root": "/mnt/data/docker_images"
}

Bash

Time your scripts

You can use the time command to easily get the execution time of a script.
For instance you want to know how long it takes to execute this command ls -l simply write:

time ls -l

The result will be something like:

real	0m0.038s
user	0m0.000s
sys 	0m0.000s

More obvious one will be the command sleep 1, the result will be:

real    0m1,003s
user    0m0,001s
sys     0m0,002s

Time your python scripts

Python scripts can also be timed with the command time. For instance, if you want to know how long it takes to execute this command python3 -c "import time; time.sleep(1)" simply write:

time python3 -c "import time; time.sleep(1)"

The result will be something like:

real	0m1.003s
user	0m0.001s
sys 	0m0.002s

Make fun of executing a script

mpv audio_file.wav & <script>

You can also make a sound based on the success of failure of the script as is...

You can also show an animation when the script successeed

function elevator {
    pid=$!
    mpv ~/elevator.mp3 --loop &> /dev/null &
    while [ 1 ]
    do
        ps -p $pid > /dev/null
        if [[ $? -ne 0 ]]; then
            pkill -9 mpv
            break
        fi
        sleep 1
    done
}

function elevatorNwarnme {
    elevator
    mpv ~/success-sound-effect.mp3 &> /dev/null
}

Check the port opened in the current public ip

https://dnschecker.org/port-scanner.php?query=82.65.214.10