Out of Date Installation docs

[dansiegel]

Description

In the ReadMe installation docs 2.1 Dependencies for Ruby the following packages are listed for install.

sudo apt-get install git-core curl zlib1g-dev build-essential libssl-dev libreadline-dev libyaml-dev libsqlite3-dev sqlite3 libxml2-dev libxslt1-dev libcurl4-openssl-dev python-software-properties libffi-dev libncurses5-dev automake libtool bison libffi-dev imagemagick libmagickcore-dev libmagickwand-dev libicu-dev

This fails due to the python-software-properties

Reading package lists... Done
Building dependency tree       
Reading state information... Done
Package python-software-properties is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
However the following packages replace it:
  software-properties-common

E: Package 'python-software-properties' has no installation candidate

I have run the suggested:

sudo add-apt-repository ppa:ondrej/php

and I still get the same result.

Also worth nothing that the following instruction in 2.2 Ruby using RVM does not work either.

curl -L https://get.rvm.io | bash -s stable

source ~/.rvm/scripts/rvm

rvm install 2.7.1

rvm use 2.7.1 --default

After running the curl command there is an archives and src directory but no scripts directory which will cause the following command to fail as no such file or directory exists.

[aristosv]

same issue here

[coreyclip]

when I ran the first curl command it was suggested that I run this:
gpg --keyserver hkp://pool.sks-keyservers.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB
and then I was able to run the curl command to get rvm