How to Install Pyenv on Ubuntu 18.04

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What is Pyenv?

Pyenv is a fantastic tool for installing and managing multiple Python versions. It enables a developer to quickly gain access to newer versions of Python and keeps the system clean and free of unnecessary package bloat. It also offers the ability to quickly switch from one version of Python to another, as well as specify the version of Python a given project uses and can automatically switch to that version. This tutorial covers how to install pyenv on Ubuntu 18.04.

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How to Install Chocolatey on Windows

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What is Chocolatey?

Chocolatey or Choco as it is sometimes referred to, is a free, open-source package manager for Windows that is very similar to Apt or DNF in the Linux realm. In other words, this is a program used for installing software via the Windows command line. It downloads a program, installs it, then it will check for updates, and installs those updates automatically if needed. Those who use Linux are quite familiar with the package management systems like this.

Some ask, “Why should we choose to use a program like this, since we can simply download the .exe or .msi software and install the program ourselves?

That is an excellent question. Here are several solid answers.

  • When we install a new operating system and want to use numerous programs, we must look for each program installer, download it, install it, and then regularly check for updates. The Chocolatey package manager this all by itself, when using automatic mode.
  • Instead of searching for an executable installer, we can install the program using the Chocolatey package manager and complete everything using the command line. It is much more convenient and faster.
  • We can conveniently and more comfortably control the application versions we need. Most often, when we go to download an executable for the application, it downloads the latest version for us, and we do not always need the latest version.
  • Chocolatey provides clear, simple commands which are almost identically used in all package management systems.

Prerequisites

  • Windows 7 or later / Windows Server 2003 or later
  • PowerShell v2 or later
  • .NET Framework 4 or later

(As an aside, the installation will attempt to install .NET 4.0 if you do not have it already installed.)

Installation

Let’s move on to the installation. There are two options for installing Chocolatey. We can install Chocolatey via the command line or through PowerShell. The option to use cmd is most often used for Windows, and PowerShell for running scripts. In this case, we can run both cmd and PowerShell, but as an administrator, for this installation.

Note:
Please inspect the Chocolatey installation script before running it to ensure safety. Chocolatey already knows it’s scripts are safe, but by default, you should verify the security and contents of any script you are not familiar with, before downloading and running it from the internet. This installation downloads a remote PowerShell script and execute it on your machine. We take security very seriously.

Install Using Powershell

When installing the software via PowerShell, we must ensure the local
Get-ExecutionPolicy
is not set to restricted. Chocolatey suggests using
Bypass
to bypass the policy to get things installed or
AllSigned
for increased security.

First, we need to run.
Get-ExecutionPolicy
If it returns
Restricted

Then we need to run
Set-ExecutionPolicy AllSigned
or
Set-ExecutionPolicy Bypass -Scope Process.

Now run the following command in the Windows shell.
Set-ExecutionPolicy Bypass -Scope Process -Force; [System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072; iex ((New-Object System.Net.WebClient).DownloadString('https://chocolatey.org/install.ps1'))

If there are no errors, Chocolatey will be installed. We can verify the installation using one of the following commands.
choco
or
choco -?

Install Using Windows Cmd Shell

First, we need ensure that we are using an administrative shell.
Next, copy the following command to our cmd.exe shell.

@"%SystemRoot%\System32\WindowsPowerShell\v1.0\powershell.exe" -NoProfile -InputFormat None -ExecutionPolicy Bypass -Command " [System.Net.ServicePointManager]::SecurityProtocol = 3072; iex ((New-Object System.Net.WebClient).DownloadString('https://chocolatey.org/install.ps1'))" && SET "PATH=%PATH%;%ALLUSERSPROFILE%\chocolatey\bin"

And then press enter. 

The installation should look something like this.

Microsoft Windows [Version 10.0.18363.900]
(c) 2019 Microsoft Corporation. All rights reserved.
C:\WINDOWS\system32>@"%SystemRoot%\System32\WindowsPowerShell\v1.0\powershell.exe" -NoProfile -InputFormat None -ExecutionPolicy Bypass -Command " [System.Net.ServicePointManager]::SecurityProtocol = 3072; iex ((New-Object System.Net.WebClient).DownloadString('https://chocolatey.org/install.ps1'))" && SET "PATH=%PATH%;%ALLUSERSPROFILE%\chocolatey\bin"
Getting latest version of the Chocolatey package for download.
Getting Chocolatey from https://chocolatey.org/api/v2/package/chocolatey/0.10.15.
Extracting C:\Users\user\AppData\Local\Temp\chocolatey\chocInstall\chocolatey.zip to C:\Users\user\AppData\Local\Temp\chocolatey\chocInstall...
Installing chocolatey on this machine
Creating ChocolateyInstall as an environment variable (targeting 'Machine')
Setting ChocolateyInstall to 'C:\ProgramData\chocolatey'
WARNING: It's very likely you will need to close and reopen your shell
before you can use choco.
Restricting write permissions to Administrators
We are setting up the Chocolatey package repository.
The packages themselves go to 'C:\ProgramData\chocolatey\lib'
(i.e. C:\ProgramData\chocolatey\lib\yourPackageName).
A shim file for the command line goes to 'C:\ProgramData\chocolatey\bin'
and points to an executable in 'C:\ProgramData\chocolatey\lib\yourPackageName'.
Creating Chocolatey folders if they do not already exist.
WARNING: You can safely ignore errors related to missing log files when
upgrading from a version of Chocolatey less than 0.9.9.
'Batch file could not be found' is also safe to ignore.
'The system cannot find the file specified' - also safe.
WARNING: Not setting tab completion: Profile file does not exist at
'C:\Users\user\Documents\WindowsPowerShell\Microsoft.PowerShell_profile.ps1'.
Chocolatey (choco.exe) is now ready.
You can call choco from anywhere, command line or powershell by typing choco.
Run choco /? for a list of functions.
You may need to shut down and restart powershell and/or consoles
first prior to using choco.
Ensuring chocolatey commands are on the path
Ensuring chocolatey.nupkg is in the lib folder
C:\WINDOWS\system32>

Verify Installation

To verify that Chocolatey is installed, we will use the choco command.

C:\WINDOWS\system32>choco
Chocolatey v0.10.15
Please run 'choco -?' or 'choco -?' for help menu.

C:\WINDOWS\system32>

Excellent! Chocolatey is installed!

Basic Chocolatey Commands

Now let’s review some of the basic commands for using Choco. Choco commands can be used in both the Windows cmd shell and in PowerShell.

Install Program

To install a specific program, use the following command.
choco install <pkg|packages.config> [ ] []</pkg|packages.config>

For example:
choco install chrome

For a complete listing of install options, visit the Choco install page or run the following command.
choco install -h

Update Program

To update a program, we will use the following command.
choco upgrade <pkg|all> [ ] []</pkg|all>
For example:
сhoco upgrade chrome

Update All Programs

To update all programs, we need to use the following command.
cup <pkg|all> [ ] []</pkg|all>
or
choco upgrade all

If you noticed, the cup command is an alternative to using the choco upgrade command.

Search For a Program

To find a needed program for downloading and installation, we can enter the following command.
choco search chrome

See Installed Programs

Using the following command, you can see which programs are already installed using Choco.
choco list --local-only
Chocolatey v0.10.15
chocolatey 0.10.15
chocolatey-core.extension 1.3.3
kubernetes-cli 1.18.2
Minikube 1.10.1
vscodium 1.38.0
5 packages installed.

C:\WINDOWS\system32>

Update Chocolatey

We can update the Choco program itself using this command.
choco upgrade chocolatey

It is important to do this periodically because in previous versions, errors may be detected, and they need to be fixed so that there are no vulnerabilities.

Install the Chocolatey GUI

If someone is not comfortable using the command line, we can install the graphical user interface of Chocolatey using this command.
choco install chocolateygui

Conclusion

That’s it! As you can see, using Chocolatey is very simple. Overall, we have found that Chocolatey is an excellent tool in our local systems administration toolbox. It is reliable, definitive, and consistently updated. Overall, it is an exceptional product.

How to Uninstall Software in Ubuntu 18.04

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Introduction

In this tutorial, we will demonstrate how to quickly and easily uninstall software from Ubuntu. Uninstalling software can be done using several techniques. In this article, we will show you how to uninstall software using these various methods.

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How to Install OBS on Linux, Windows and MacOS

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What is OBS?

obs_icon_small

OBS (Open Broadcaster Software) is a free and open-source video recording and livestreaming software program that is written in C, C ++, and Qt and developed by the OBS project and a community of independent developers. It is mainly used for streaming and recording videos. It supports a wide range of plugins to extend the functionality of the program.

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How to Install and Correct Dependencies Issues in Ubuntu

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What is a Dependency?

A dependency is defined as a file, component, or software package that a program needs to work correctly. Almost every software package we install depends on another piece of code or software to work as expected. Because the overall theme of Linux has always been to have a program do one specific thing, and do it well, many software titles utilize other pieces of software to run correctly.

Introduction

Let’s review what dependencies are and why they are required. We all have, at one point or another, most certainly seen a message from our system when we were installing software regarding “missing dependencies.” This error denotes that a required part of the software package is outdated, unavailable or missing. Let’s review how to address those issues when we come across them on Ubuntu.

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How to Add or Remove a PPA in Ubuntu 18.04

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What is a PPA?

A PPA (or Personal Package Archive) is a software repository provided by members of the Ubuntu Linux community. Software contained in a PPA can be downloaded and installed via apt, Ubuntu’s defacto package management system.

Typically, PPA’s will contain new or updated software to existing packages that may not be available from the official Ubuntu package repositories. This allows users to have more granular control over when specific software packages are updated on their systems. It is important to be discerning when utilizing PPA’s and to only add a PPA from a trusted source.

The best reason for adding software via a PPA, is the server will get automatic updates to the installed software when updates are run.

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How to Uninstall Software on Ubuntu

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In this article, we will be discussing the various methods and techniques used to locate and uninstall the software from a Ubuntu/Debian based server. We will primarily be using the apt and dpkg commands on the command line.

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How To Create A Software Install List

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Purpose

The purpose of this article is to describe and explore ways to copy or backup your currently existing installed software titles into a single file for later use. We can then use this file to reinstall the software onto another system or clone the existing software across multiple Linux systems on or across a network. This method also prevents the need to install software titles one by one.

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What is Single Tenant vs Multi-Tenant Software?

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Evaluating Single-Tenant vs. Multi-Tenant Software

tenant splash

Today, we will be discussing the differences between Single Tenant and Multi-Tenant hosted software. In the overall scheme of SaaS delivery models, the meaning of “Tenant” is specifically utilized to denote a “customer”. So, in essence, when we say Single Tenant or Multi-Tenant, we are stating Single customer, or Multi-customer SaaS hosted software. 

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Installing Linux Software Via The Commandline

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Installing Linux software from the command line can save you time, money, and make life easy – if you know what you’re doing! This article is a brief overview of how the command line operates on a RedHat or CentOS based Linux distribution, or even within a server cluster.

Once we have learned how the command line works, we will move on to installing, removing, and updating our software packages via the command line with yum. To get started, let’s begin by making sure we understand what the command line does.

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