Thanks for the help. I think my OS is 32-bit.
I tried what mentioned in the post, but still failed. BTW, I found a file named adobe-linux-i386.repo under /etc/yum.repos.d. The content is
[adobe-linux-i386]
name=Adobe Systems Incorporated
baseurl=http://linuxdownload.adobe.com/linux/i386/
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-adobe-linux
Any idea what is this for and is something wrong?
Thanks!