Category: Linux

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Enable SSH on Target Host

Refer: https://gist.github.com/slowkow/8798394

The hostname of your remote server.

host=myserver.com

Create this folder if it does not exist: ~/.ssh

mkdir ~/.ssh

Set the correct permissions (required)

chmod 700 ~/.ssh

Generate an RSA key pair for identification with the remote server

ssh-keygen -t rsa

Copy your public key to the remote server

cat ~/.ssh/id_rsa.pub | ssh $host 'cat >> ~/.ssh/authorized_keys'

ssh is very strict about correct permissions, let's not change home folder persmissions

chmod 700 ~/.ssh
chmod 600 ~/.ssh/authorized_keys

At this point, you can connect to your server without typing a password:

ssh username@myserver.com
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Install Numix Theme

Refer: https://itsfoss.com/install-numix-ubuntu/
Refer: https://www.gnome-look.org/p/1170667/

$ sudo add-apt-repository ppa:numix/ppa
$ sudo apt-get update
$ sudo apt-get install numix-gtk-theme numix-icon-theme-circle

The wallpapers no longer exist
$ sudo apt-get install numix-wallpaper-*

Original Defults

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Make a Window Transparent in Ubuntu 18.04

Refer: http://tipsonubuntu.com/2018/11/12/make-app-window-transparent-ubuntu-18-04-18-10/

Open terminal either via Ctrl+Alt+T or from software launcher.

When terminal opens, paste following the command and hit enter:
sh -c 'xprop -f _NET_WM_WINDOW_OPACITY 32c -set _NET_WM_WINDOW_OPACITY $(printf 0x%x $((0xffffffff * 80 / 100)))'

Your mouse cursor will become cross-shaped, simply click on any window and it become 80% opacity.
In the command, you can change 80 to number range from 1 ~ 99 for other window opacity.

To reset the window opacity, run command:
sh -c 'xprop -f _NET_WM_WINDOW_OPACITY 32c -set _NET_WM_WINDOW_OPACITY $(printf 0x%x $((0xffffffff * 100 / 100)))'

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Installing Pop Theme

Refer: https://itsfoss.com/install-themes-ubuntu/

$ sudo add-apt-repository ppa:system76/pop
$ sudo apt-get update
$ sudo apt-get install pop-theme
$ sudo apt install gnome-shell-extensions

 

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Install Wine on Ubuntu 18.04 with PlayOnLinux

Refer: http://tipsonubuntu.com/2019/02/01/install-wine-4-0-ubuntu-18-10-16-04-14-04/

The official wine repository offers Ubuntu packages for all current Ubuntu releases, so you can easily install it via following steps:

1. Open terminal from application menu, then run command to enable 32 bit architecture:

sudo dpkg --add-architecture i386

Type user password (no visual feedback) when it prompts and hit Enter.

2. Run command to download and add the repository key:

wget -nc https://dl.winehq.org/wine-builds/winehq.key

sudo apt-key add winehq.key

3. For Ubuntu 18.04, Linux Mint 19.x, run command to add the repository:

sudo apt-add-repository 'deb https://dl.winehq.org/wine-builds/ubuntu/ bionic main'

For other releases, replace bionic in the code with:

cosmic for Ubuntu 18.10.
xenial for Ubuntu 16.04, and Linux Mint 18.x.
trusty for Ubuntu 14.04.

4. Finally check system package cache and install Wine 4.0:

sudo apt-get update

sudo apt-get install --install-recommends winehq-stable

For Ubuntu 18.04 and higher, you can skip apt-get update as it’s done after adding PPA.

How to Use Wine in Ubuntu:

Once installed, you need to generate configuration file by running command:

winecfg

It prompts you to install some libraries and finally launches the configuration dialog.

To run a .exe file, right-click on file, select “Open with Other Application”, and choose “Wine Windows Program Loader”.

Uninstall:

To remove Wine repository, go to Software & Updates -> Other Software, highlight the repository line and remove it.

Now you can install PlayOnLinux with the software store...

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24 Python Libraries

Refer: https://www.infoworld.com/article/3008915/24-python-libraries-for-every-python-developer.html

Another web browser like flask, called bottle
Refer: http://bottlepy.org/docs/dev/
$ sudo pip install bottle

Run Linux sh command inside python
# Refer: http://amoffat.github.io/sh/
$ sudo pip install sh

Abstracts Selenium and can run Chrome and headless Chrome
Refer: https://splinter.readthedocs.io/en/latest/drivers/chrome.html
$ sudo pip install splinter

 

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Parallels Resize Issue

Refer: https://askubuntu.com/questions/1073568/preventing-window-resizing-after-resume

There's an issue when resuming from suspend, the screen warps and it needs resized.  This fix does not work completely but it downsizes the window, so you just need to double-click to get it working again.  This is NOT a perfect solution for Parallels and it is wonky when suspending in full screen too.

If this returns a value of uint32 0, then it means you have automatic scaling turned on. I found that setting this to a specific value (in my case 1) fixed the issue, which you can do using the following:

gsettings get org.gnome.desktop.interface scaling-factor
gsettings set org.gnome.desktop.interface scaling-factor 1

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Lubuntu Synapse – Program Search

Refer:  http://lubuntuhowto.blogspot.com/2017/03/using-synapse-on-lubuntu.html

sudo apt-get install synapse

After you install it, you have to launch it for your current session, and then it will be active when you hit [Ctrl] + [Space]

It's found in Start, Accessories, Synapse