INS-40406 The installer detects no existing Oracle Grid Infrastructure software on the system

Recently I tiried to upgrade a simple 11.2 Grind Infrastructure installation to 11.2.0.4 with the Upgrade Option from the Oracle Universal Installer. During the Upgrade i get the following error: INS-40406 The installer detects no existing Oracle Grid Infrastructure software on the system. CAUSE: The installer was unable to detect any existing Oracle Clusterware or…

yum update fails with Python Error – ImportError: No Module Named CElementTree

You are trying to update Oracle Enterprise Linux and get a error similar like this. [root@server2 ~]# yum update Loaded plugins: security Traceback (most recent call last):   File „/usr/bin/yum“, line 29, in <module>     yummain.user_main(sys.argv[1:], exit_code=True)   File „/usr/share/yum-cli/yummain.py“, line 285, in user_main     errcode = main(args)   File „/usr/share/yum-cli/yummain.py“, line 136, in main…