Today, I try to login to my Oracle Linux VM with my oracle account. It was working properly before reboot. However, somehow when I login , the system log me off immediately.
I suspect it maybe something with my .bash_profile which could cause the error. Luckily, I have another account which I can use to login. After I login and found the error message in the .xsession-errors
I was right about the .bash_profile. After fixing it, I can successfully login with my oracle account.