I have CentOS 7 installed on my virtualbox. I havent run or power on this virtual machine for a while and now I want to install some packages on it. But, I got the following error message on Terminal when I run yum command
[root@localhost fitri]# yum install plank
Loaded plugins: fastestmirror, langpacks
Exiting on user cancel
I tried to install another package but got the same error.