Update einfracz-cloud.md

docs.it4i/cloud/einfracz-cloud.md

@@ -19,6 +19,29 @@ To create your first VM instance, follow the [e-INFRA CZ guide][4].
 Note that the guide is similar for clouds in Brno and Ostrava,
 so make sure that you follow steps for Ostrava cloud where applicable.
 
+### Prerequsities
+
+To run your instance, you need:
+
+* Terraform
+  * Linux/Mac/WSL terminal BASH shell
+  * installed Terraform and sshuttle
+  * [downloaded application credentials][7] from OpenStack Horizon dashboard and saved as a `project_openrc.sh.inc` text file
+  * follow the guide [https://gitlab.ics.muni.cz/cloud/g2/openstack-infrastructure-as-code-automation/-/tree/master/clouds/g2/ostrava/general/terraform][8]
+* OpenStack
+  * Linux/Mac/WSL terminal BASH shell
+  * installed [OpenStack client][9]
+
+Run commands:
+
+```console
+source project_openrc.sh.inc
+```
+
+```console
+./cmdline-demo.sh basic-infrastructure-1
+```
+
 ## Technical Reference
 
 For the list of deployed OpenStack services, see the [list of components][1].
@@ -33,6 +56,8 @@ More information can be found on the [e-INFRA CZ website][2].
 [4]: https://docs.e-infra.cz/compute/openstack/getting-started/creating-first-infrastructure/
 [5]: https://docs.e-infra.cz/compute/openstack/technical-reference/ostrava-site/quota-limits/
 [6]: https://ostrava.openstack.cloud.e-infra.cz/
+[7]: https://docs.fuga.cloud/how-to-use-the-openstack-cli-tools-on-linux
+[8]: https://gitlab.ics.muni.cz/cloud/g2/openstack-infrastructure-as-code-automation/-/tree/master/clouds/g2/ostrava/general/terraform
 
 [a]: ../karolina/introduction.md
 [b]: ../general/access/project-access.md