I will Install Gitlab on Ubuntu 20.04

gitlab.sh

# If you need to install GitLab: The DevOps tool on your ubuntu then contact with me:

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# Step 1: Update System
sudo apt update
sudo apt -y full-upgrade
sudo apt install build-essential checkinstall
sudo apt install ubuntu-restricted-extras
sudo apt install software-properties-common
sudo apt install software-properties-common
sudo apt upgrade -o APT::Get::Show-Upgraded=true
sudo apt-show-versions | grep upgradeable
sudo apt install apt-show-versions
sudo apt update -y
sudo apt-get upgrade -y 
sudo reboot

## Step 2 - Configuring the Firewall
sudo ufw enable
# Run the following ufw commands to open these ports:
sudo ufw allow 80/tcp
sudo ufw allow 443/tcp

sudo apt-get install gitlab-cc