github.com/containers/podman/v5@v5.1.0-rc1/docs/source/markdown/options/env.md (about)

     1  ####> This option file is used in:
     2  ####>   podman create, exec, run
     3  ####> If file is edited, make sure the changes
     4  ####> are applicable to all of those.
     5  #### **--env**, **-e**=*env*
     6  
     7  Set environment variables.
     8  
     9  This option allows arbitrary environment variables that are available for the process to be launched inside of the container. If an environment variable is specified without a value, Podman checks the host environment for a value and set the variable only if it is set on the host. As a special case, if an environment variable ending in __*__ is specified without a value, Podman searches the host environment for variables starting with the prefix and adds those variables to the container.