# Varnish Installation

This section covers installation prerequisites, a step-by-step installation procedure, how and where to get help, and how to report bugs.

- Prerequisites
- Installing Varnish
  - Installing on Debian/Ubuntu
  - Installing on FreeBSD
  - Installing on OpenBSD
  - Installing on RedHat or CentOS
- Compiling Varnish from source
  - Compiling Varnish from source
- Other pre-built Varnish packages
- Getting help
  - IRC Channel
  - Mailing Lists
  - Trouble Tickets
  - Commercial Support
- Reporting bugs
  - Varnish crashes
  - Varnish goes on vacation
  - Varnish does something wrong
- Platform specific notes
  - On Linux, use tmpfs for the workdir
  - workdir can not be mounted `noexec`
  - Lift locked memory limits
  - Transparent Hugepage on Linux
  - OpenVZ
  - TCP keep-alive configuration