diff --git a/README.md b/README.md
index bcecc8b..42a629a 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,4 @@
-# distribugit
-Tool for performing operations on many git repositories at once.
+# DistribuGit
+Tool for performing operations on many git repositories at once. It works by cloning a set of repositories, and applying an action to each repository.
+
+The easiest way to use this toolset for automating git operations is to include it as a maven dependency.
diff --git a/src/main/java/nl/andrewl/distribugit/DistribuGit.java b/src/main/java/nl/andrewl/distribugit/DistribuGit.java
index c7ac9c7..0fd668c 100644
--- a/src/main/java/nl/andrewl/distribugit/DistribuGit.java
+++ b/src/main/java/nl/andrewl/distribugit/DistribuGit.java
@@ -166,13 +166,14 @@ public class DistribuGit {
 	}
 
 	public static void main(String[] args) throws IOException {
-		new Builder()
+		new DistribuGit.Builder()
 				.selector(RepositorySelector.from(
 						"https://github.com/andrewlalis/RandomHotbar.git",
 						"https://github.com/andrewlalis/CoyoteCredit.git",
 						"https://github.com/andrewlalis/SignalsAndSystems2021.git"
 				))
-				.action(git -> System.out.println("Cloned!"))
+				.credentials(GitCredentials.ofUsernamePassword("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", ""))
+				.action(RepositoryAction.ofCommand("/bin/bash", "../../test.sh"))
 				.statusListener(new StatusListener() {
 					@Override
 					public void progressUpdated(float percentage) {
@@ -184,8 +185,8 @@ public class DistribuGit {
 						System.out.println("Message: " + message);
 					}
 				})
-				.strictFail(true)
-				.cleanup(true)
+				.strictFail(false)
+				.cleanup(false)
 				.build().doActions();
 	}
 }
diff --git a/src/main/java/nl/andrewl/distribugit/RepositoryAction.java b/src/main/java/nl/andrewl/distribugit/RepositoryAction.java
index 93c4f0d..43b4fe9 100644
--- a/src/main/java/nl/andrewl/distribugit/RepositoryAction.java
+++ b/src/main/java/nl/andrewl/distribugit/RepositoryAction.java
@@ -5,5 +5,21 @@ import org.eclipse.jgit.api.Git;
 public interface RepositoryAction {
 	void doAction(Git git) throws Exception;
 
-
+	/**
+	 * An action which executes a system command, as handled by
+	 * {@link ProcessBuilder}. Note that the working directory of the command
+	 * is set to the directory of the repository.
+	 * @param command The command to run.
+	 * @return The command action.
+	 */
+	static RepositoryAction ofCommand(String... command) {
+		return git -> {
+			ProcessBuilder pb = new ProcessBuilder(command);
+			pb.directory(git.getRepository().getWorkTree());
+			pb.inheritIO();
+			Process p = pb.start();
+			int result = p.waitFor();
+			if (result != 0) throw new IllegalStateException("Non-zero exit code from script.");
+		};
+	}
 }