Can I add maven repositories in the command line?

mvn install -Dmaven.repository=http://example.com/maven2

mvn package -Dmaven.repo.remote=http://www.ibiblio.org/maven/,http://myrepo
  -Dmaven.repo.local=c:testrepo

mvn deploy -P MyRepo2

mvn deploy -P MyRepo1

<?xml version="1.0" encoding="UTF-8"?>
    <project xmlns="http://maven.apache.org/POM/4.0.0"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    ...
    <repositories>
        	<repository>
        		<id>MavenCentral</id>
        		<name>Maven repository</name>
        		<url>http://repo1.maven.org/maven2</url>
        		<releases>
        			<enabled>true</enabled>
        		</releases>
        		<snapshots>
        			<enabled>false</enabled>
        		</snapshots>
        	</repository>
...
        	<repository>
        		<id>Codehaus Snapshots</id>
        		<url>http://snapshots.repository.codehaus.org/</url>
        		<snapshots>
        			<enabled>true</enabled>
        		</snapshots>
        		<releases>
        			<enabled>false</enabled>
        		</releases>
        	</repository>
        </repositories>

    ...

        <pluginRepositories>
        	<pluginRepository>
        		<id>apache.snapshots</id>
        		<name>Apache Snapshot Repository</name>
        		<url>
        			http://people.apache.org/repo/m2-snapshot-repository
        		</url>
        		<releases>
        			<enabled>false</enabled>
        		</releases>
        	</pluginRepository>
        	<pluginRepository>
        		<id>Codehaus Snapshots</id>
        		<url>http://snapshots.repository.codehaus.org/</url>
        		<snapshots>
        			<enabled>true</enabled>
        		</snapshots>
        		<releases>
        			<enabled>false</enabled>
        		</releases>
        	</pluginRepository>
        </pluginRepositories>

    ...

    </project>