Command lnd not found even after installing lnd

I tried installing lnd using the commands shown in the installation guide. I used these commands:

git clone https://github.com/lightningnetwork/lnd cd lnd make install 

but when I try running the lnd command, I get this:

Command 'lnd' not found 

I have go1.18.1 installed. I did execute these commands, but nothing changed:

export GOPATH=~/go export PATH=$PATH:$GOPATH/bin 

Here are the $GOPATH and $PATH variables:

echo $GOPATH  /usr/local/go 

echo $PATH /home/ayoub/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/home/ayoub/.dotnet/tools:/usr/local/go/bin:/usr/local/go/bin 

How can I solve this issue? I am running Ubuntu 20.04.

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