1. Open a command terminal
Run terminal and then first, issue an update command

sudo apt update
sudo apt-get install build-essential

2. Install Git on Ubuntu 20.04
For setting up LinuxBrew on Ubuntu, we need to install GIT on our system, here is the command for that…

sudo apt install git -y

3. Run Homebrew installation script
The official website of Brew offers a pre-build script to install download and install Homebrew using the command line on any available Linux such as CentOS, RHEL, OpenSUSE, Linux Mint, Kali, MX Linux, POP!OS and others.
Here is the command, just run it:

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

4. Add Homebrew to your PATH
To run the brew command after installation, we need to add it to our system path…

eval "$(/home/linuxbrew/.linuxbrew/bin/brew shellenv)"

5. Check Brew is working fine
To ensure everything is working correctly to use brew, we can run its command-

brew doctor
# In case it complains about the linked directory
 mkdir -p /home/linuxbrew/.linuxbrew/var/homebrew/linked
 chown -R $(whoami) /home/linuxbrew/.linuxbrew/var/homebrew/linked

It may give the warning to install GCC and to remove that simply install it using brew-

brew install gcc