/usr/bin/xauth: file /home/oracle/.Xauthority does not exist

In My Case :
IF ERROR on LOGIN :
/usr/bin/xauth:  file /home/oracle/.Xauthority does not exist

Check The /etc/passwd

oinstall:x:1001:1001::/home/oinstall:/bin/sh
oracle:x:1002:1001::/home/oracle:/bin/sh

REPLACE /bin/sh with /bin/bash
oinstall:x:1001:1001::/home/oinstall:/bin/bash
oracle:x:1002:1001::/home/oracle:/bin/bash