How to Install SFDX-CLI on Ubuntu 20.04 with Autocomplete using NVM

install-sfdx-script.sh

# How to Install SFDX-CLI on Ubuntu 20.04 with Autocomplete using NVM
#
# By: Vernon Keenan, vern@vernonkeenan.com, https://salesforcedevops.net, https://github.com/vkeenan
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# Install the following for a full SFDX-CLI installation:
#
#  * Zsh shell
#  * Oh My Zsh shell enhancement
#  * NVM NodeJS verison manager
#  * Lastest LTS versions of NodeJS and NVM
#  * SFDX-CLI autocompletion database from @wadewegner
#
# Paste these lines one-at-time in user context on a fresh Ubuntu 20.04 installation
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# Install Zsh
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sudo apt install zsh -y
chsh -s $(which zsh)
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# Logout and log back in
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logout
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# Upon login, answer the Zsh question with "0"
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# Install Oh My Zsh
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sh -c "$(curl -fsSL https://raw.githubusercontent.com/ohmyzsh/ohmyzsh/master/tools/install.sh)"
exit
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# reload Zsh configuration
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source ~/.zshrc
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# configure Oh My Zsh
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sed -i 's/robbyrussell/agnoster/' ~/.zshrc
sed -i 's/plugins=(git)/plugins=(git salesforce-cli-zsh-completion)/' ~/.zshrc
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# update SFDX-CLI autocomplete database
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git clone git@github.com:wadewegner/salesforce-cli-zsh-completion.git ~/.oh-my-zsh/custom/plugins/salesforce-cli-zsh-completion
source ~/.zshrc
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# install nvm
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curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.38.0/install.sh | zsh
source ~/.zshrc
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# install NodeJS v14 and NPM v6
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nvm install --lts
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# install SFDX-CLI with minimal security issues
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npm install sfdx-cli -g
source ~/.zshrc
#
# test basic SFDX-CLI installation
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sfdx