Changing Passwords for SYS and SYSTEM on Linux/UNIX
We are 11.2.0.3 GI and RAC on rhel5. A co-worker was planning to change passwords for SYS and he found an odd statement in MOS article "How to Change SYS and SYSTEM Passwords [ID 1051982.6]".
"Note that any OS user who is a member of the osdba group (usually 'dba') can run 'sqlplus / as sysdba'. Because of this it is necessary to change the password of the OS users who are members of this group. "
This was news to me. I have changed passwords for SYS and SYSTEM many times before and have never modified the OS user's (oracle) password at the same time. Access as sysdba was not impaired.