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

     1  ####> This option file is used in:
     2  ####>   podman create, pod clone, pod create, run
     3  ####> If file is edited, make sure the changes
     4  ####> are applicable to all of those.
     5  #### **--subuidname**=*name*
     6  
     7  Run the container in a new user namespace using the map with _name_ in the _/etc/subuid_ file.
     8  If running rootless, the user needs to have the right to use the mapping. See **subuid**(5).
     9  This flag conflicts with **--userns** and **--uidmap**.