Hello, Anytime when I issue rpm command, there will be a warning massage "warning: only V3 signatures can be verified, skipping V4 signature". For example, [root at hadoop-datanode44 ~]# rpm -qa | grep -i post postgresql-server-8.3.8-1PGDG.rhel4 warning: only V3 signatures can be verified, skipping V4 signature postgresql-8.3.8-1PGDG.rhel4 postgresql-pgpool-II-2.3.1-1 postgresql-libs-8.3.8-1PGDG.rhel4 postgresql-devel-8.3.8-1PGDG.rhel4 What does this message mean? Thanks. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos/attachments/20100414/3c7f1ff9/attachment-0003.html>