install ruby on linux fedira code example

Example 1: ruby install on fedora

sudo -i
dnf install gcc-c++ patch readline readline-devel zlib zlib-devel \
    libyaml-devel libffi-devel openssl-devel make \
    bzip2 autoconf automake libtool bison sqlite-devel

Example 2: ruby install on fedora

rvm list

   ruby-2.4.4 [ x86_64 ]
 * ruby-2.5.1 [ x86_64 ]
=> ruby-2.7.0 [ x86_64 ]

# => - current
# =* - current && default
#  * - default