---
-title: The Container Interface
+title: Container Interface
category: Interfaces
layout: default
---
`container_ttys=pts/7 pts/8 pts/14` it will spawn three additional login
gettys on ptys 7, 8, and 14.
+4. To allow applications to detect the OS version and other metadata of the host
+ running the container manager, if this is considered desirable, please parse
+ the host's `/etc/os-release` and set a `$container_host_<key>=<VALUE>`
+ environment variable for the ID fields described by the [os-release
+ interface](https://www.freedesktop.org/software/systemd/man/os-release.html), eg:
+ `$container_host_id=debian`
+ `$container_host_build_id=2020-06-15`
+ `$container_host_variant_id=server`
+ `$container_host_version_id=10`
+
## Advanced Integration
1. Consider syncing `/etc/localtime` from the host file system into the