rbenv install 2.2.10 fails in Ubuntu 20.04 - Need OpenSSL 1.0.0, how to have multiple openssl versions?

[cratag]

According to docs:

When building Ruby 2.3 or older, you must ensure that OpenSSL 1.0 is available somewhere on the system and point to it via the --with-openssl-dir configure flag. At the moment, most Linux distributions that come with OpenSSL 1.1 have a separate package for OpenSSL 1.0.

openssl version -v returns OpenSSL 1.1.1f 31 Mar 2020
I've installed 1.0.2 following this, but then I only had OpenSSL 1.0.2l 25 May 2017 which interferes with another 3.0.0 Ruby App I have.

Ubuntu has no 'brew'. I installed brew following their docs.

Then this command
RUBY_CONFIGURE_OPTS="--with-openssl-dir=$(brew --prefix [email protected])" rbenv install 2.2.10
returns

Error: No available formula with the name "[email protected]".

so I followed this link
and ran:
brew tap rbenv/tap
brew install rbenv/tap/[email protected]

and then
RUBY_CONFIGURE_OPTS="--with-openssl-dir=$(brew --prefix [email protected])" rbenv install 2.2.10

result:
BUILD FAILED (Ubuntu 20.04 using ruby-build 20210309)

Inspect or clean up the working tree at /tmp/ruby-build.20210322123729.48434.WmdkHX
Results logged to /tmp/ruby-build.20210322123729.48434.log

Last 10 log lines:
make[1]: *** Waiting for unfinished jobs....
linking shared-object psych.so
installing default psych libraries
make[2]: Leaving directory '/tmp/ruby-build.20210322123729.48434.WmdkHX/ruby-2.2.10/ext/psych'
linking shared-object pathname.so
make[2]: Leaving directory '/tmp/ruby-build.20210322123729.48434.WmdkHX/ruby-2.2.10/ext/pathname'
linking shared-object nkf.so
make[2]: Leaving directory '/tmp/ruby-build.20210322123729.48434.WmdkHX/ruby-2.2.10/ext/nkf'
make[1]: Leaving directory '/tmp/ruby-build.20210322123729.48434.WmdkHX/ruby-2.2.10'
make: *** [uncommon.mk:189: build-ext] Error 2

Maybe there's an easier command without brew for linux?

[cratag]

This was the solution I found, and with a small tweak it worked.
Thanks to EliKazap
Edit /etc/apt/sources.list and add this at the end of the file: deb http://security.ubuntu.com/ubuntu bionic-security main

then

Run sudo apt-get update && apt-cache policy libssl1.0-dev

Run sudo apt-get install libssl1.0-dev

check if the version is correct with ./usr/local/ssl/bin/openssl version

and then

RUBY_CONFIGURE_OPTS="--with-openssl-dir='/usr/local/ssl/bin'" rbenv install 2.2.10

[ibariens]

Thanks @cratag for also taking the time to post your solution. That helped me a lot.
In case it helps anyone, I used your solution but I built the package instead of adding an item to sources.list

1. Ensure you have 'curl' and 'make' packages installed
2. Download and unzip openssl
   - curl https://www.openssl.org/source/openssl-1.0.2l.tar.gz | tar xz && cd openssl-1.0.2l
3. install openssl to directory /old-openssl-version-1.0.2

- ./config --prefix=/old-openssl-version-1.0.2 --openssldir=/old-openssl-version-1.0.2
- sudo make
- sudo make install

4. use the 1.0 openssl version for building ruby
   RUBY_CONFIGURE_OPTS="--with-openssl-dir='/old-openssl-version-1.0.2/bin'" rbenv install 2.2.10
5. Optional, install older version of bundler
   gem install bundler -v '~>1'

[ctrlcctrlv]

Just a note for other Googlers:

In Bash, this won't work—

RUBY_CONFIGURE_OPTS="--with-openssl-dir='/usr/local/ssl/bin'" rbenv install 2.2.10

The single quotes are taken literally.

You need:

export RUBY_CONFIGURE_OPTS="--with-openssl-dir=/usr/local/ssl/bin"

Or if following good recommended instructions at #1940 (comment):

export RUBY_CONFIGURE_OPTS="--with-openssl-dir=/opt/openssl-1.1.1o"