yum-utils 详解 yum-utils是yum的工具包集合,由不同的作者开发,使yum使用起来更加方便和强大.包括:debuginfo-install,find-repos-of-install, needs-restarting, package-cleanup, repoclosure, epodiff, repo-graph, repomanage, repoquery, repo-rss, reposync,: repotrack, show-installed, show-cha