New in CentOS 7.1-1511 64-bit: Since release 1503 (abrt>= 2.1.11-19.el7.centos.0.1) CentOS-7 can report bugs directly to bugs.centos.org. You can find information about that feature at this page; sudo is now capable of verifying command checksums; A Kerberos https proxy is now available for identity management Lewis dot structure covalent bonds worksheet pdf