Something is wrong with your RHEL/CentOS state.
Can you check these 💯
- Did the
wget work ? Try using curl -O So the instructions look like
cd /etc/yum.repos.d
curl -O http://trisul.org/download/trisulfull.repo
yum group list
Check DNS is working from your box
If nothing works, just download the RPMs and install using rpm -Uvh
Trisul support