What is the meaning of the "4:", "2:", "30:" and "1:" prefixes for the following entries in yum.log? Most entries in yum.log don't have them. grep "Installed: [0-9]*:" /var/log/yum.log May 07 16:45:53 Installed: 4:perl-5.8.8-27.el5.i386 May 07 16:58:21 Installed: 2:xinetd-2.3.14-10.el5.i386 May 07 17:03:43 Installed: 30:bind-libs-9.3.6-4.P1.el5_4.2.i386 May 07 17:03:43 Installed: 30:bind-utils-9.3.6-4.P1.el5_4.2.i386 May 07 17:12:28 Installed: 1:telnet-0.17-39.el5.i386