Install ruby on Ubuntu

rvm_ruby.sh

#https://deanpcmad.com/2024/installing-older-ruby-versions-on-ubuntu-24-04-and-22-04/

rvm get head

wget https://www.openssl.org/source/openssl-1.1.1g.tar.gz
tar zxvf openssl-1.1.1g.tar.gz

cd openssl-1.1.1g
./config --prefix=$HOME/.openssl/openssl-1.1.1g --openssldir=$HOME/.openssl/openssl-1.1.1g

make
make test
make install

rm -rf ~/.openssl/openssl-1.1.1g/certs
ln -s /etc/ssl/certs ~/.openssl/openssl-1.1.1g/certs

Install any ruby version with --with-openssl-dir option.
I installed ruby-2.6.5 like this:

rvm reinstall ruby-2.6.5 --with-openssl-dir=$HOME/.openssl/openssl-1.1.1g