How to install zsh on Debian, Ubuntu or Linux Mint

Zsh is a shell designed for interactive use, although it is also a powerful scripting language.

To install Zsh on Debian, Ubuntu or Linux Mint use command:

sudo apt install zsh

Next install “Oh My Zsh” – delightful, open source, community-driven framework for managing your Zsh configuration. Use command:

sh -c "$(curl -fsSL"

If you want to change zsh theme go to:

In order to enable a theme, set ZSH_THEME to the name of the theme in your ~/.zshrc

nano ~/.zshrc

Some themes need custom fonts, install it from git:

git clone --depth=1
cd fonts

KDE change application launcher

1. Download new application launcher from site:

2. Run command:

plasmapkg2 --install LauncherName.tar.gz

If you want to upgrade launcher to new version use command:

plasmapkg2 --upgrade LauncherName.tar.gz

3. Right click on Start Menu icon > Show alternatives > Select LauncherName

If you want to uninstall launcher use command:

plasmapkg2 --remove LauncherName.tar.gz

Setup Proxmox cluster

1. First download official ISO image from Proxmox website:

2. Write ISO image to USB flash drive using program Etcher:

3. Boot PC from USB drive and install Proxmox. If you have two hard drives you can use ZFS file system to create RAID array.

Now log in to Proxmox admin panel using Web-browser: https://server-ip-address:8006

After installation we need to upgrade our system. Proxmox based on Debian GNU Linus and it use Debian repositories but in free version of Proxmox we will have an error when we try to upgrade. We need to disable enterprise Proxmox repositories. Open file /etc/apt/sources.list.d/pve-enterprise.list and comment with symbol # first line with enterprise Proxmox repository.

nano /etc/apt/sources.list.d/pve-enterprise.list

Then we can update packages list and upgrade our system:

apt update
apt upgrade

After installation let’s configure Local storage.

In admin panel go to Datacenter -> Storage, select local-lvm storage and click Remove

After that go to your Node -> Shell and write next commands:

lvremove /dev/pve/data
lvresize -l +100%FREE /dev/pve/root

And the last command to resize our local storage to 100% is:

resize2fs /dev/mapper/pve-root

Done, now we can use 100% of local storage, installed in our server. If you click on local storage you can see entire size of hard drive.

To remove the “You do not have a valid subscription for this server” popup message while logging in, run the command bellow:

sed -Ezi.bak "s/(\(\{\s+title: gettext\('No valid sub)/void\(\{ \/\/\1/g" /usr/share/javascript/proxmox-widget-toolkit/proxmoxlib.js && systemctl restart pveproxy.service

Restore MySQL database from files

If you have MySQL database files and you want to restore database on new server do next steps:

1. Stop MySQL server:

systemctl stop mysql

2. Copy all files of database to /var/lib/mysql directory;

3. Also copy files:


4. Change user and group of all files in directory /var/lib/mysql to mysql:mysql:

chown -R mysql:mysql .

5. Change permission of files in directory /var/lib/mysql to 660

find . -type f -print0 | xargs -0 chmod 660

6. Start MySQL server:

systemctl start mysql

To restore database from SQL dump use command:

mysql -u [user] -p [database_name] < [filename].sql

How to fix Nextcloud 4047 InnoDB refuses to write tables with ROW_FORMAT=COMPRESSED or KEY_BLOCK_SIZE

If you have an error like:

InnoDB refuses to write tables with ROW_FORMAT=COMPRESSED or KEY_BLOCK_SIZE

All you need – to edit mysql configuration file: /etc/mysql/my.cfg

sudo nano /etc/mysql/my.cfg

Add this command:


Save changes and restart mysql server:

sudo systemctl restart mysql

LibreWolf web browser

LibreWolf is a fork of Firefox, focused on privacy, security and freedom. This browser provides such features:

  • No Telemetry;
  • Private Search;
  • Ad Block Included;
  • Enhanced Security;
  • Fast Updates;
  • Open Source;

Download this program You can on the official Web-site of LibreWolf browser:

The source code of LibreWolf You can get here:


Touchégg is an app that runs in the background and transform the gestures you make on your touchpad or touchscreen into visible actions in your desktop.

For example, you can swipe up with 3 fingers to maximize a window or swipe left with 4 finger to switch to the next desktop.

Many more actions and gestures are available and everything is easily configurable.

Download and install program you can on official Git repository:

How to add directory to PATH in Linux

The $PATH environment variable is a list of directories that tells the shell which directories to search for executable files.

To check what directories are in your $PATH list use command:

echo $PATH

To add new directory ~/.local/bin/ to $PATH use command:

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

But this change is only temporary and valid only in the current shell session.

To make the change permanent, you need to define the $PATH variable in the shell configuration files. In most Linux distributions when you start a new session, environment variables are read from the following files:

  • Global shell specific configuration files such as /etc/environment and /etc/profile. Use this file if you want the new directory to be added to all system users $PATH.
  • Per-user shell specific configuration files. For example, if you are using Bash, you can set the $PATH variable in the ~/.bashrc file. If you are using Zsh the file name is ~/.zshrc.

In this example, we’ll set the variable in the ~/.bashrc file. Open the file with your text editor and add the following line at the end of it:

nano ~/.bashrc

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

Save the file and load the new $PATH into the current shell session using the source command:

source ~/.bashrc

To confirm that the directory was successfully added, print the value of your $PATH by typing:

echo $PATH

Yt-dlp: youtube-dl alternative

yt-dlp is a youtube-dl fork based on the now inactive youtube-dlc. The main focus of this project is adding new features and patches while also keeping up to date with the original project.

Official GitHub repository:


sudo wget -O /usr/local/bin/yt-dlp
sudo chmod a+rx /usr/local/bin/yt-dlp

Yt-dlp usage similar as a youtube-dl. To show all supported video formats use command:

yt-dlp -F

To download video use command with flag yt-dlp -f <firmat-id> <video-url>

yt-dlp -f 22