atual do projeto. Vale a pena executar cada um deles para ver o que acontece!1)Exibe as atualizacoes existentes para as dependencias do projeto.mvn versions:display-dependency-updatesResultado semelhante a: [INFO] The following dependencies in Dependencies have newer versions:[INFO] commons-io:commons-io ..................................... 2.1 -> 2.4[INFO] commons-logging:commons-logging ....................... 1.1.1 -> 1.1.32) Exibe as atualizacoes existentes para os plugins configurados no projeto.mvn versions:display-plugin-updates...[INFO] All plugins with a version specified are using the latest versions.[INFO][WARNING] The following plugins do not have their version specified:[WARNING] maven-clean-plugin .......................... (from super-pom) 2.5[WARNING] maven-compiler-plugin ....................... (from super-pom) 3.1[WARNING] maven-deploy-plugin ......................... (from super-pom) 2.7[WARNING] maven-install-plugin ........................ (from super-pom) 2.4[WARNING] maven-jar-plugin ............................ (from super-pom) 2.4[WARNING] maven-resources-plugin ...................... (from super-pom) 2.6[WARNING] maven-site-plugin ........................... (from super-pom) 3.3[WARNING] maven-surefire-plugin ...................... (from super-pom) 2.15[INFO][WARNING] Project does not define minimum Maven version, default is: 2.0[INFO] Plugins require minimum Maven version of: 2.2.1[INFO] Note: the super-pom from Maven 3.0.4 defines some of the plugin[INFO] versions and may be influencing the plugins required minimum Maven[INFO] version.[INFO][ERROR] Project does not define required minimum version of Maven.[ERROR] Update the pom.xml to contain[ERROR] [ERROR] 2.2.1[ERROR] [INFO][INFO] Require Maven 2.0.2 to use the following plugin updates:[INFO] maven-site-plugin ........................................ 2.0-beta-7[INFO][INFO] Require Maven 2.0.6 to use the following plugin updates:[INFO] maven-clean-plugin .............................................. 2.5[INFO] maven-deploy-plugin ............................................. 2.7[INFO] maven-install-plugin ............................................ 2.4[INFO] maven-jar-plugin ................................................ 2.4[INFO] maven-resources-plugin .......................................... 2.6[INFO] maven-site-plugin ............................................. 2.0.1[INFO] maven-surefire-plugin ......................................... 2.4.3[INFO][INFO] Require Maven 2.0.9 to use the following plugin updates:[INFO] maven-compiler-plugin ........................................... 3.1[INFO] maven-surefire-plugin .......................................... 2.15[INFO][INFO] Require Maven 2.1.0 to use the following plugin updates:[INFO] maven-site-plugin ............................................. 2.1.1[INFO][INFO] Require Maven 2.2.0 to use the following plugin updates:[INFO] maven-site-plugin ............................................... 3.0[INFO][INFO] Require Maven 2.2.1 to use the following plugin updates:[INFO] maven-site-plugin ............................................... 3.33) Exibe a arvore detalhada de dependenciasmvn dependency:tree -Ddetail...[INFO] br.com.maven3.tutorial:hot.commands:jar:0.0.1-SNAPSHOT[INFO] +- commons-logging:commons-logging:jar:1.1.1:compile[INFO] \- commons-io:commons-io:jar:2.1:compile4)Exibe a lista de dependencias do projetomvn dependency:list...[INFO] commons-io:commons-io:jar:2.1:compile[INFO] commons-logging:commons-logging:jar:1.1.1:compile5) Exibe a versao completa do pom.mvn help:effective-pom6) Exibe a configuracao do mavenmvn help:effective-settings7)Exibe as variaveis de ambiente e de sistemamvn help:system8)Exibe o classpath das dependencias do projetomvn dependency:build-classpath9)Exibe quais dependencias sao desnecessariasmvn dependency:analyze...[WARNING] Unused declared dependencies found:[WARNING] commons-logging:commons-logging:jar:1.1.1:compile[WARNING] commons-io:commons-io:jar:2.1:compile10)Exibe as dependencias que estao duplicadas no projeto.dependency:analyze-duplicate...[INFO] List of duplicate dependencies defined in in your pom.xml:o commons-io:commons-io:jarConsideracoes FinaisEmbora tais comandos possam informar que plugins ou dependencias estejam desatualizados vale sempre a pena pensar duas vezes antes de aplicar atualizacoes que possam gerar efeitos colaterais. Atualizacoes devem ser seguidas de muitos testes. Testes devem abranger todas as areas envolvidas do projeto. O tempo necessario para aplicar tais atualizacoes e/ou possiveis correcoes devem ser contemplados.