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Category: GNU/Linux

GNU/Linux

Mint, Software, Terminal

[Mint] Install PyWal on Linux Mint 19.2 Cinnamon

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“Pywal is a tool that generates a color palette from the dominant colors in an image. It then applies the colors system-wide and on-the-fly in all of your favourite programs.”
For the installation look at Github. In my case I had to run the following command:

sudo apt purge python3-pip && sudo apt install --install-recommends python3-pip && pip3 install pywal

To get an overview of your PyWal installation run:

pip3 show pywal

Test it with:

wal -v

If it returns “zsh: command not found: pywal” you have to add the PIP install directory to your path

export PATH="${PATH}:${HOME}/.local/bin/"

To use PyWal, just run it with wal -i and the path to an image.

wal -i /path/to/image.jpg
Mint, Software

[Mint] Install Polybar on Linux Mint 19.2 Cinnamon

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Install dependencies:

sudo apt-get install cmake cmake-data libcairo2-dev libxcb1-dev libxcb-ewmh-dev libxcb-icccm4-dev libxcb-image0-dev libxcb-randr0-dev libxcb-util0-dev libxcb-xkb-dev pkg-config python-xcbgen xcb-proto libxcb-xrm-dev i3-wm libasound2-dev libmpdclient-dev libiw-dev libcurl4-openssl-dev libpulse-dev

Clone Polybar repo:

git clone https://github.com/jaagr/polybar.git

Build Polybar:

cd polybar && ./build.sh

During the installtion choose “install example configuration” and you will find it here:

$HOME/.config/polybar/config

Testrun the example configuration with the following command (the bar in this config is called “example”):

polybar example

Further configuration options can be found on their Github page.

Terminal

[Shell] Zsh + Oh My Zsh + Powerlevel10k

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Install Zsh (Shell)
https://github.com/robbyrussell/oh-my-zsh/wiki/Installing-ZSH

sudo apt install zsh
chsh -s $(which zsh)

Logout and login back again to use your new default shell.

echo $SHELL

Expected result: /bin/zsh

Install Oh My Zsh (Zsh framework with tools and themes)
https://github.com/robbyrussell/oh-my-zsh

sh -c "$(curl -fsSL https://raw.githubusercontent.com/robbyrussell/oh-my-zsh/master/tools/install.sh)"

In addition I installed the Powerline Fonts:

apt-get install fonts-powerline

Restart your terminal to launch the Oh My Zsh configuration.
After the installation and configuration I usually add “neofetch | lolcat” at the end of my zsh config: ~/.zshrc

Install Powerlevel10K (Powerlevel10k is a theme for ZSH)
https://github.com/romkatv/powerlevel10k#oh-my-zsh

git clone --depth=1 https://github.com/romkatv/powerlevel10k.git ${ZSH_CUSTOM:-$HOME/.oh-my-zsh/custom}/themes/powerlevel10k

Set ZSH_THEME=powerlevel10k/powerlevel10k in your ~/.zshrc.

I also installed the patched Meslo Nerd Font and set it as terminal font. Else some icons will not be displayed in Powerlevel10k.
Restart your terminal and go through the configuration steps. The result will look similar to this:

Or like this:

Next you could install a Zsh plugin like: https://nocin.eu/shell-zsh-autosuggestions/

Or check the OMZ Cheatsheet: https://github.com/ohmyzsh/ohmyzsh/wiki/Cheatsheet

Software

[Firefox] ShadowFox + Add-Ons

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Since the Dark Theme in Firefox 68.0.2 still has a flashing white page when opening a new tab, it’s no useable dark theme in my opinion.
That’s why I prefer ShadowFox (Github) instead of the native dark theme. Easy to install and many ways to do further customizing.

Firefox Add-ons I use:

Also, I like bookmarks in the toolbar centralized. Just append the following lines to the userChrome.css.
The file is placed in your Firefox Profile: ~/.mozilla/firefox/profile_name/chrome/userChrome.css

#PersonalToolbar {
  display: flex !important;
  justify-content: center !important;
}

Terminal

[Terminal] Neofetch + lolcat

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1. Install neofetch.

sudo apt install neofetch

2. Install lolcat.

# When installing with "apt install lolcat", you will get version: lolcat 42.0.99
# To get the current version use:
sudo apt remove lolcat -y
wget https://github.com/busyloop/lolcat/archive/master.zip
unzip master.zip
rm master.zip
cd lolcat-master/bin
sudo gem install lolcat

3. Append the following line at the end of your ~/.bashrc (or at the beginning, if you are using zsh: ~/.zshrc) file, to get the neofetch output on every terminal run.

neofetch | lolcat

If you want to change the config of neofetch, you’ll find it here:

~/.config/neofetch/config.conf
Terminal

[Shell] Replace pattern

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How to replace a specific pattern in a file or folder name. In my case I needed to correct the season on each file of a series from “S08” to “S09”:

for f in *; do mv "$f" "$(echo "$f" | sed s/S08/S09/)"; done

If you want to replace a pattern recursive, use the command “find”:

find . -name '*' -exec bash -c 'echo mv $0 ${0/S08/S09}' {} \;    // with echo for testrun

Terminal

[Terminal] Command Line Audio Visualizer

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Look at Github cli-visualizer for installation instructions.

Path to config file: ~/.config/vis/config
I’ve decommented these two lines:

audio.sources=pulse
colors.scheme=rainbow

Run with “vis”.
Use the following controls when running:

KeyDescription
spaceSwitch visualizers
q or CTRL-CQuit
rReload config
cNext color scheme
sToggle Mono/Stereo Mode
+Increase scaling by 10%
–Decrease scaling by 10%
Terminal

[Terminal] Simple man page

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If you are using the man command, e.g.:

man find

You will often get a very long manual.
But there is a much easier to read man page called tldr, with examples how to use the command.

apt install tldr
tldr find

Terminal

[Terminal] Terminal cat grep

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Most users are using cat and grep for searching for a string in a file:

cat filename | grep search_string

But you can use grep completely without cat:

grep search_string filename