Mado Tech Tips

28/05/2020

Filtering in Linux top command

sudo top -c -p $(pgrep -d',' -f plex)

21/05/2020

dd: TEST Disk WRITE Speed
Run the following command to test the WRITE speed of a disk:

Example:
$ sync; dd if=/dev/zero of=tempfile bs=1M count=1024; sync
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB) copied, 3.28696 s, 327 MB/s

dd: TEST Read/Write Speed of an External Drive

Example:
$ sync; dd if=/dev/zero of=/media/user/MyUSB/tempfile bs=1M count=1024; sync

27/01/2020

Elementary OS
vs code suddenly become the default file manager eg when clicking "open in folder" in chrome.

Check
xdg-mime query default inode/directory

Change
xdg-mime default io.elementary.files.desktop inode/directory

21/01/2020

Enable double click instead of single click in Elementary OS Files

Open dconf-editor
under io.elementary.files.preferences
change as per screenshot

21/01/2020

Install and use system76-power in elementary os

Add Repo :
sudo apt-add-repository -y ppa:system76-dev/stable
*if command not found do a "sudo apt-get install software-properties-common"
sudo apt update

Install :
sudo apt install system76-power

Change card :
sudo system76-power graphics nvidia
OR
sudo system76-power graphics intel
*and check which one you're using with command
system76-power graphics

set a power profile:
sudo system76-power profile battery

battery - CPU: 25% - 50%,
balanced (default) - CPU: 25% - 100% or
performance - CPU: 50% - 100%

18/01/2020

Create a Bootable USB Stick from the Ubuntu Terminal

1. Unmount the USB if it is mounted
Use df command to check USB that is mounted
Use sudo umount /path/where/mounted to unmount USB

2. create bootable USB
sudo dd bs=4M if=/path/to/ISOfile of=/dev/sdx status=progress oflag=sync

27/12/2019

Linux : How to scale text in elementaryos at 125%

Source :

I installed elementary OS on my laptop(14-inch,1080p). and the icon and text are just too small, smaller than Win10. Textsize in the settings only effects on the preinstalled applications. I've...

21/12/2019

Python : Converting ipynb and py files

Install
conda install -c defaults -c conda-forge ipynb-py-convert

Example
ipynb-py-convert examples/plot.py examples/plot.ipynb
or
ipynb-py-convert examples/plot.ipynb examples/plot.py

Source :

Convert .py files runnable in VSCode/Python or Atom/Hydrogen to jupyter .ipynb notebooks and vice versa

21/12/2019

Github
Steps to clear out the history of a git/github repository
https://gist.github.com/stephenhardy/5470814

Adding an existing project to GitHub using the command line
https://help.github.com/en/github/importing-your-projects-to-github/adding-an-existing-project-to-github-using-the-command-line

Your first time with git and github
https://kbroman.org/github_tutorial/pages/first_time.html

Github Guides : Hello World
https://guides.github.com/activities/hello-world/

21/12/2019

Installing Chrome Browser in Pixel Slate Crostini

1. Open Terminal (Crostini)
2. Download Chrome for debian. Can use wget or directly from browser in Chrome OS. Link : https://dl.google.com/linux/direct/google-chrome-stable_current_amd64.deb
3. sudo apt --fix-broken install ./google-chrome-stable_current_amd64.deb

Actually I just knew about using apt to install deb. Usually I use dpkg -i command. using --fix-broken option it also download the dependencies for google chrome.

19/12/2019

Crostini on Pixel Slate : LXD

Here is some reading on Using LXD on Chromebook Crostini

Introduction On supported Chromebook, starting with Chrome OS 69, a new feature called Linux Apps was introduced. This allows Chrome OS users, on supported to install normal Linux applications from the Debian repository and have them integrate with the underlying Chrome OS desktop. The feature has e...

19/12/2019

Crostini on Pixel Slate : Setting up miniconda and jupyter notebook on Crostini

sudo bash Miniconda3-latest-Linux-xs86_64.sh
*note : where to install Miniconda - /opt/miniconda3

sudo chown -R williamsvincent /opt/miniconda3
* note : williamsvincent is the sample username here, change it with yours

source /opt/miniconda3/bin/activate

conda install -c conda-forge jupyterlab

jupyter-notebook

source :
https://installpython3.com/chromebook/
https://jupyter.org/install