Update cheatsheets

linux/rpm-ostree

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# rpm-ostree
+
+> A hybrid image/package system.
+> Manage ostree deployments, package layers, filesystem overlays, and boot configuration.
+> More information: <https://coreos.github.io/rpm-ostree/administrator-handbook/>.
+
+- Show rpm-ostree deployments in the order they will appear in the bootloader:
+
+`rpm-ostree status`
+
+- Show packages which are outdated and can be updated:
+
+`rpm-ostree upgrade --preview`
+
+- Prepare a new ostree deployment with upgraded packages and reboot into it:
+
+`rpm-ostree upgrade --reboot`
+
+- Reboot into the previous ostree deployment:
+
+`rpm-ostree rollback --reboot`
+
+- Install a package into a new ostree deployment and reboot into it:
+
+`rpm-ostree install {{package}} --reboot`