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-rw-r--r--docs/podman-run.1.md8
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diff --git a/docs/podman-run.1.md b/docs/podman-run.1.md
index edd7ed681..c1183e910 100644
--- a/docs/podman-run.1.md
+++ b/docs/podman-run.1.md
@@ -21,6 +21,14 @@ If the IMAGE is not already loaded then **podman run** will pull the IMAGE, and
all image dependencies, from the repository in the same way running **podman
pull** IMAGE, before it starts the container from that image.
+Several files will be automatically created within the container when it is run.
+These include `/etc/hosts`, `/etc/hostname`, and `/etc/resolv.conf` to manage
+networking. These will be based on the host's version of the files, though they
+can be customized with options (for example, **--dns** will override the host's
+DNS servers in the created `resolv.conf`). Additionally, an empty file is
+created in each container to indicate to programs they are running in a
+container. This file is located at `/run/.containerenv`.
+
## OPTIONS
**--add-host**=[]
Add a custom host-to-IP mapping (host:ip)