$ git clone https://github.com/asdf-vm/asdf.git
Cloning into 'asdf'...
remote: Enumerating objects: 8663, done.
remote: Counting objects: 100% (576/576), done.
remote: Compressing objects: 100% (316/316), done.
remote: Total 8663 (delta 288), reused 445 (delta 249), pack-reused 8087
Receiving objects: 100% (8663/8663), 2.87 MiB | 3.02 MiB/s, done.
Resolving deltas: 100% (5130/5130), done.

 vim ~/.bashrc

. $HOME/asdf/asdf.sh
. $HOME/asdf/completions/asdf.bash

source ~/.bashrc

$ asdf --version
v0.10.2-7e7a1faa 

 $ asdf
version: v0.10.2-7e7a1faa

MANAGE PLUGINS
asdf plugin add <name> [<git-url>]      Add a plugin from the plugin repo OR,
                                        add a Git repo as a plugin by
                                        specifying the name and repo url
asdf plugin list [--urls] [--refs]      List installed plugins. Optionally show
                                        git urls and git-ref
asdf plugin list all                    List plugins registered on asdf-plugins
                                        repository with URLs
asdf plugin remove <name>               Remove plugin and package versions
asdf plugin update <name> [<git-ref>]   Update a plugin to latest commit on
                                        default branch or a particular git-ref
asdf plugin update --all                Update all plugins to latest commit on
                                        default branch

……
……

RESOURCES
GitHub: https://github.com/asdf-vm/asdf
Docs:   https://asdf-vm.com

"Late but latest"
-- Rajinikanth