Varnish is an HTTP accelerator designed for content-heavy dynamic web sites. In contrast to other HTTP accelerators, many of which began life as client-side proxies or origin servers, Varnish was designed from the ground up as an HTTP accelerator.
Use following command:
[root@localhost siwan]# su
[root@localhost siwan]# yum install varnish
ncurses are needed for textual “graphical” configuration.
[root@localhost siwan]# yum install ncurses-devel
Edit the setting of varnish
[root@localhost siwan]# vim /etc/varnish/default.vcl
Start the varnish.
[root@localhost varnish]# /etc/init.d/varnish start
on startup set varnish on
[root@localhost varnish]# /sbin/chkconfig varnish on