1.配置yum源
[root@localhost yum.repos.d]# uname -r
3.10.0-693.el7.x86_64
[root@localhost yum.repos.d]# cat /etc/redhat-release
CentOS Linux release 7.5.1804 (Core)
wget -O /etc/yum.repos.d/copr-pkerling-seafile.repo https://copr.fedorainfracloud.org/coprs/pkerling/seafile/repo/epel-7/pkerling-seafile-epel-7.repo
2.直接安装
yum install seafile
报错了，系统已安装qt5的版本高了，来源是base源，但是我的本地源local（安装的光盘）有符合版本要求的QT5
Error: Package: qt5-qtdeclarative-5.6.2-1.el7.x86_64 (local)
Requires: qt5-qtbase(x86-64) = 5.6.2
Installed: qt5-qtbase-5.9.2-3.el7.x86_64 (@base)
qt5-qtbase(x86-64) = 5.9.2-3.el7
Available: qt5-qtbase-5.6.2-1.el7.x86_64 (local)
qt5-qtbase(x86-64) = 5.6.2-1.el7
3.把base源移入备份文件夹，刷新缓存
mv CentOS-Base.repo bak20180514/
yum clean all
yum repolist
4.删除高版本的QT5
rpm -e qt5-qtbase-5.9.2-3.el7.x86_64
一堆依赖包报错，实践证明了用rpm删不行，只好用yum删
error: Failed dependencies:
libQt5Core.so.5()(64bit) is needed by (installed) qt5-qtbase-gui-5.9.2-3.el7.x86_64
libQt5Core.so.5()(64bit) is needed by (installed) qt5-qtxmlpatterns-5.9.2-1.el7.x86_64
libQt5Core.so.5(Qt_5)(64bit) is needed by (installed) qt5-qtbase-gui-5.9.2-3.el7.x86_64
libQt5Core.so.5(Qt_5)(64bit) is needed by (installed) qt5-qtxmlpatterns-5.9.2-1.el7.x86_64
libQt5Core.so.5(Qt_5.9)(64bit) is needed by (installed) qt5-qtbase-gui-5.9.2-3.el7.x86_64
libQt5Core.so.5(Qt_5.9)(64bit) is needed by (installed) qt5-qtxmlpatterns-5.9.2-1.el7.x86_64
libQt5Core.so.5(Qt_5_PRIVATE_API)(64bit) is needed by (installed) qt5-qtbase-gui-5.9.2-3.el7.x86_64
libQt5Core.so.5(Qt_5_PRIVATE_API)(64bit) is needed by (installed) qt5-qtxmlpatterns-5.9.2-1.el7.x86_64
libQt5DBus.so.5()(64bit) is needed by (installed) qt5-qtbase-gui-5.9.2-3.el7.x86_64
libQt5DBus.so.5(Qt_5)(64bit) is needed by (installed) qt5-qtbase-gui-5.9.2-3.el7.x86_64
libQt5EglFSDeviceIntegration.so.5()(64bit) is needed by (installed) qt5-qtbase-gui-5.9.2-3.el7.x86_64
libQt5Network.so.5()(64bit) is needed by (installed) qt5-qtbase-gui-5.9.2-3.el7.x86_64
libQt5Network.so.5()(64bit) is needed by (installed) qt5-qtxmlpatterns-5.9.2-1.el7.x86_64
libQt5Network.so.5(Qt_5)(64bit) is needed by (installed) qt5-qtbase-gui-5.9.2-3.el7.x86_64
libQt5Network.so.5(Qt_5)(64bit) is needed by (installed) qt5-qtxmlpatterns-5.9.2-1.el7.x86_64
qt5-qtbase = 5.9.2-3.el7 is needed by (installed) qt5-qtbase-common-5.9.2-3.el7.noarch
qt5-qtbase(x86-64) = 5.9.2-3.el7 is needed by (installed) qt5-qtbase-gui-5.9.2-3.el7.x86_64
qt5-qtbase(x86-64) = 5.9.2 is needed by (installed) qt5-qtxmlpatterns-5.9.2-1.el7.x86_64
yum删除QT5
yum -y remove qt5-qtbase
rpm -ql qt5-qtbase
rpm -qa qt5-qtbase
5.安装5.6.2.版本的QT5，
yum list qt5-qtbase-5.6.2-1.el7.x86_64
yum -y install qt5-qtbase.x86_64
yum install seafile-client-qt（安装图形界面，测试的时候命令行界面用不了）