Getting errors when I update and upgrade In (Ubantu 18.10)

Hello,

I have used apt-get update && apt-get upgrade command to update and upgrade In Ubantu 18.10)

I am getting below errors.

E: Could not get lock /var/lib/dpkg/lock-frontend - open (11: Resource temporarily unavailable) E: Unable to acquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), is another process using it?"

Would you please let me know possible way to fix this issue.

Thanks