# How to enable Expanded Security Maintenance for Infrastructure (`esm-infra`)

For Ubuntu LTS releases, `esm-infra` will be automatically enabled after attaching
the Ubuntu Pro Client to your account. After ubuntu-advantage-tools is installed and your machine is
attached, `esm-infra` should be enabled. If `esm-infra` is not enabled, you can enable it
with the following command:

```console
$ sudo pro enable esm-infra
```

With the `esm-infra` repository enabled, specially on Ubuntu 14.04 and 16.04, you may see
a number of additional package updates available that were not available previously.
Even if your system had indicated that it was up to date before installing the
ubuntu-advantage-tools and attaching, make sure to check for new package updates after
`esm-infra` is enabled using `apt upgrade`. If you have cron jobs set to install updates, or other
unattended upgrades configured, be aware that this will likely result in a number of package updates
with the `esm-infra` content.

Running apt upgrade will now apply all of package updates available, including the ones in `esm-infra`.

```console
$ sudo apt upgrade
```

More information: https://ubuntu.com/security/esm
