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Linux Related Knowledge

In this Gist Sebastian Monta shares various solutions and use-cases he experienced while working with Linux.

  1. Some useful Linux apps
  2. System information
  3. Managing Linux services
  4. OS level tweaks
  5. File Permissions & Ownership
  6. Web browsers related
  7. Supportive tools & services
  8. CLI Tweaks

   

Some useful Linux apps

Dconf Editor Dconf Editor

Viewer and editor of applications internal settings

Some Dock config pathes

If Dash to Panel extension used, ignore following

Action when double-click on a running app

/org/gnome/shell/extensions/dash-to-dock/middle-click-action

Suggested: 'quit' | default: 'launch'

Action when click on a running app

/org/gnome/shell/extensions/dash-to-dock/click-action

Suggested: 'minimize' | default: 'focus-or-previews'

Action when shift+clicking on a running app

/org/gnome/shell/extensions/dash-to-dock/shift-click-action

Suggested: 'previews' | default: 'launch'

Action when scrolling a dock

/org/gnome/shell/extensions/dash-to-dock/scroll-action

Suggested: 'do-nothing' | default: 'switch-workspace'

   

Visual Studio Code Visual Studio Code

Code editing. Redefined. Free. Built on open source. Runs everywhere.

Installation steps for Linux

Download custom configuration by Sebastian Monta: settings.json

   

Brave Brave

Web browser. Browse privately. Search privately.

Installation steps for Linux (Debian, Ubuntu and Mint)

   

Docker Docker

Develop faster. Run anywhere.

Installations steps:

  1. Install Docker Engine on Ubuntu
  2. Docker Engine post-installation steps

   

Lando Lando

Coding at lightspeed.

Install Lando - /bin/bash -c "$(curl -fsSL https://get.lando.dev/setup-lando.sh)"

Lando config

Set channel + Make the "unsupported docker" warning less obtrusive:

Open ~/.lando/config.yml & add / modify:

channel: none dockerSupportedVersions: engine: satisfies: '>22' tested: '>22'

Original config: https://github.com/lando/core/blob/main/config.yml

   

Sublime Text Sublime Text

Sophisticated text editor for code, markup and prose.

Instruction how to install & activate theme

GitHub themes for Sublime Text

   

Metadata Cleaner Metadata Cleaner

App to view and clean metadata in files.

Sometimes files downloaded from internet contains a lot of dirty metadata.

   

DeaDBeeF DeaDBeeF

Music player. Super lightweigth (written in C). Actively maintained.

   

System information

ipinfo.io ipinfo.io

The trusted source for IP address data

Allows to get ip, provider hostname & org, region, country, location, limezone in CLI

Ensure we really get JSON, and not the IPinfo homepage HTML:

curl ipinfo.io/json

curl -H "Accept: application/json" ipinfo.io

   

dmidecode

Get System Hardware Information

sudo dmidecode --type

sudo dmidecode -s

Other examples / approach of usage

sudo dmidecode --type memory

sudo dmidecode --string baseboard-product-name

   

Iwconfig

Wireless tools for Linux

iwconfig

   

Inxi

A Powerful Feature-Rich Command-line System Information Tool for Linux

Install:

sudo apt install inxi

inxi -Fxz

   

xrandr

Command line interface to configure monitor (View info, Resize, Rotate and more)

Get Display sizes (x & y axis in mm):

xrandr --query | grep -w 'connected'

   

Managing Linux services

Remove Snap Packages in Ubuntu Linux

A tutorial on how to remove Snap from Ubuntu Linux and getting a snap-free system.

Tutorial inculde Firefox installation (without snap).

   

Disable bluetooth permanently

Set stronger disablement for bluetooth service, uninstall bluetooth app.

Basically following 3 commands:

sudo service bluetooth stop
sudo systemctl disable --now bluetooth.service
sudo systemctl mask --now bluetooth.service

   

Restart a Network in Linux

Restart a network without needing to restart the PC.

Two valid commands (excerpts from an article):

sudo systemctl restart NetworkManager.service

sudo nmcli networking off && sudo nmcli networking on

   

OS level tweaks

Enable Quick Preview

Click on the file and hit Space to preview it.

sudo apt install gnome-sushi

Fix Long Shutdown Time

Change shutdown default timeout.

Quick fix:

sudo xdg-open /etc/systemd/system.conf

Change #DefaultTimeoutStopSec=90s to DefaultTimeoutStopSec=5s

   

Grub bootloader’s options

Tutorial will instruct how to modify & overwrite:

hiddenmenu: Option that hide / show GRUB’s boot menu

timeout: GRUB’s timeout option (in seconds)

default: GRUB’s default option - specify default boot (OS)

Edit GRUB file

sudo gedit /etc/default/grub

If you change this file, run sudo update-grub afterwards to update

   

Gnome Extensions Gnome Extensions

1st - Install Gnome shell & extension itself:

sudo apt install chrome-gnome-shell gnome-shell-extension-prefs

2nd - Add GNOME Shell integration extension to Firefox

Explore via extensions-next    

Dash to Panel Dash to Panel

This extension moves the dash into the gnome main panel so that the application launchers and system tray are combined into a single panel.

Dash to Panel preview

Download & import following dash_to_panel.config file into Dash to Panel extension

   

Keyboard Backlight Slider Keyboard Backlight Slider

Allow setting the keyboard backlight brightness with a slider in the main menu

Keyboard Backlight Slider preview

   

Light/Dark Theme Switcher Light/Dark Theme Switcher

Button in panel: switch between global dark and light themes.

Warning: Not maintained anymore

   

Desktop Icons NG (DING) Desktop Icons NG (DING)

Adds icons to the desktop. Fork of the original Desktop Icons extension, with several enhancements.

   

Bedtime Mode Bedtime Mode

Converts to grayscale the entire Gnome workspace by using a smooth transition. Suggest to use during evening/night.

   

TLP - Optimise Battery Life (option)

Command line utility for saving laptop battery power without the need to delve deeper into technical details.

Article Quickly Increase & Optimise Linux Laptop Battery Life ( Practical usage of TLP Battery Management Tool in Linux)

Note: Sebastian Monta is not using TLP [right now], he trusts Ubuntu

   

File Permissions & Ownership

chmod

Change the access permissions and the special mode flags of file system objects

Example

sudo chmod -R 753 /some path

Numbers explained

1st Number 7 - Read, write, and execute for the user

2dn Number 5 - Read and execute for the group

3rd Number 3 - Write and execute for others

   

Info table about numbers
Number Description ls Binary
0 No permissions at all --- 000
1 Only execute --x 001
2 Only write -w- 010
3 Write and execute -wx 011
4 Only read r-- 100
5 Read and execute r-x 101
6 Read and write rw- 110
7 Read, write, and execute rwx 111

   

chown

Change the owner of file system files, directories

sudo chown -R $USER /some_path

   

Web browsers related

Search engines for Firefox

Setting up different search engines for Firefox browser.

Just open Search engines link and follow instructions to add search engine You prefer.

   

Supportive tools & services

Microsoft fonts for Linux

Installer for Microsoft TrueType core fonts (Arial, Courier New, Georgia, Times New Roman, Trebuchet, Verdana, etc) to be available in other apps.

Install:

sudo apt-get install ttf-mscorefonts-installer

   

CLI Tweaks

Download .zshrc by Sebastian Monta to configure shell scripts (zsh). Place it in Your $HOME directory.

Follow further steps for setting up neat CLI interface.

   

Konsole Konsole

A powerful and customizable terminal emulator

install:

sudo apt install konsole

Konsole Themes & user Profiles install path

~/.local/share/konsole

Download Materia Light KDE theme directly - Materia.colorscheme

Download pre-configured user profile for Konsole: ValtersZana.profile

Fira Code - Monospaced font that render ligatures (character sequences). Ubuntu installation: sudo apt install fonts-firacode

   

Oh My ZSH! Oh My ZSH!

Framework for managing your zsh configuration.

Prerequisite (zsh, curl / wget, git):

sudo apt install zsh curl wget git ruby

Ruby will fix some scm breeze alias further.

Basic Installation:

  1. sh -c "$(curl -fsSL https://raw.githubusercontent.com/ohmyzsh/ohmyzsh/master/tools/install.sh)"

Updates: By default, you will be prompted to check for updates every 2 weeks.

   

Spaceship Prompt Spaceship Prompt

Minimalistic, powerful and extremely customizable ZSH prompt.

Spaceship Prompt Used in CLI (terminals / command-line tools).

Basic Installation & update steps:

  1. git clone https://github.com/spaceship-prompt/spaceship-prompt.git "$ZSH_CUSTOM/themes/spaceship-prompt" --depth=1

  2. ln -s "$ZSH_CUSTOM/themes/spaceship-prompt/spaceship.zsh-theme" "$ZSH_CUSTOM/themes/spaceship.zsh-theme"

   

SCM Breeze SCM Breeze

Set of shell scripts (for bash and zsh) that enhance your interaction with git.

Basic Installation steps:

  1. git clone https://github.com/scmbreeze/scm_breeze.git ~/.scm_breeze

  2. source ~/.zshrc

  3. [ -s "$HOME/.scm_breeze/scm_breeze.sh" ] && source "$HOME/.scm_breeze/scm_breeze.sh"

Update SCM Breeze: update_scm_breeze

Git global config

git config --global push.autoSetupRemote true

git config --global push.default current

git config --global core.editor "subl --wait"

git config --global user.email "may@domain.com"

git config --global user.name "Firstname Lastname"