update readme

Readme.md

@@ -7,8 +7,54 @@ https://github.com/pyenv/pyenv
 Ideas for RPM packaging:
 https://github.com/niligulmohar/pyenv-rpm
 
-# Development
+# Usage
 
+Use pyenv:
+```bash
+# show installed versions
+pyenv versions
+# show current python version
+pyenv version
+# show possible python versions to install
+pyenv install --list
+# install a python version
+pyenv install <versions>
+
+# activate python version for current shell:
+pyenv shell <version>
+
+# uninstall python version
+pyenv uninstall <version>
+
+# create a python environment
+pyenv virtualenv <version> <name>
+
+# activate virtual environment in current shell
+pyenv shell <name>
+
+# remove virtualenv
+pyenv virtualenv-delete <name>
+```
+
+
+*INFO: Somehow `pyenv local` does not work (i.e. switching python version based on directory!)*
+
+Tutorial: https://realpython.com/intro-to-pyenv
+
+
+# Installation
+Install the rpm to get pyenv on the system. Afterwards you can bring/initialize pyenv into your shell via:
+
+```bash
+export PYENV_ROOT="$HOME/.pyenv"
+[[ -d $PYENV_ROOT/bin ]] && export PATH="$PYENV_ROOT/bin:$PATH"
+eval "$(pyenv init -)"
+```
+
+To initialize for all users you might want to add a bash profile file to `/etc/profile.d` like this one: [pyenv.sh](pyenv.sh)
+
+# Development
+# Manual Bild
 ```
 docker run --platform linux/amd64 -it --rm -v $(pwd):/data --workdir /data  gitea.psi.ch/images/rhel9-developer
 
@@ -16,7 +62,7 @@ rpmbuild -ba pyenv.spec
 ```
 
 
-# Installation
+# Manual Installation
 See: https://gitea.psi.ch/linux/issues/issues/327#issuecomment-22876
  and https://github.com/pyenv/pyenv
 
@@ -59,34 +105,4 @@ Installation virtualenv plugin (https://github.com/pyenv/pyenv-virtualenv):
 git clone https://github.com/pyenv/pyenv-virtualenv.git /opt/pyenv/plugins/pyenv-virtualenv
 ```
 
-Use pyenv:
-```bash
-# show installed versions
-pyenv versions
-# show current python version
-pyenv version
-# show possible python versions to install
-pyenv install --list
-# install a python version
-pyenv install <versions>
 
-# activate python version for current shell:
-pyenv shell <version>
-
-# uninstall python version
-pyenv uninstall <version>
-
-# create a python environment
-pyenv virtualenv <version> <name>
-
-# activate virtual environment in current shell
-pyenv shell <name>
-
-# remove virtualenv
-pyenv virtualenv-delete <name>
-```
-
-
-*INFO: Somehow `pyenv local` does not work (i.e. switching python version based on directory!)*
-
-Tutorial: https://realpython.com/intro-to-pyenv