For CentOS 8 run the following as root:
cd /etc/yum.repos.d/
wget https://download.opensuse.org/repositories/isv:ownCloud:desktop:client-2.5.4/CentOS_8/isv:ownCloud:desktop:client-2.5.4.repo
yum install ocqt5121-filesystem
For CentOS 7 run the following as root:
cd /etc/yum.repos.d/
wget https://download.opensuse.org/repositories/isv:ownCloud:desktop:client-2.5.4/CentOS_7/isv:ownCloud:desktop:client-2.5.4.repo
yum install ocqt5121-filesystem
For CentOS 6 run the following as root:
cd /etc/yum.repos.d/
wget https://download.opensuse.org/repositories/isv:ownCloud:desktop:client-2.5.4/CentOS_6/isv:ownCloud:desktop:client-2.5.4.repo
yum install ocqt5121-filesystem