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yum -y install epel-release
yum -y install varnish  
systemctl start varnish
systemctl enable varnish
cd /etc/varnish
vim default.vcl
vim varnish.params
systemctl restart varnish
 semanage port -a -t http_port_t -p tcp 5001
 semanage port -m -t http_port_t -p tcp 5001