# Environment variables

The variables presented in this section can be used with any sctool command.

sctool uses the following environment variables:

* SCYLLA_MANAGER_CLUSTER - if set, specifies the default value for the `-c, --cluster` flag, in commands that support it.
* SCYLLA_MANAGER_API_URL - if set, specifies the default value for the `--api-url` flag; it can be useful when using sctool with a remote ScyllaDB Manager server.

The environment variables may be saved in  your `~/.bashrc` file so that the variables are set after login.