DokuWiki » Infrastructure » Operating System » CentOS 7

h1. Install unison

h2. Requirements

To install unison you will need the following:

* a installed and supported operating system (e.g. CentOS 7.x)

* root-access

* [[repo_epel|EPEL]]

* access to [[http://www.seas.upenn.edu]]

* a fast internet connection

h2. Preliminary note

most of this is taken from 

* [[https://www.digitalocean.com/community/questions/install-unison-in-centos-7]]

you may consult the official homepage

* [[http://www.cis.upenn.edu/~bcpierce/unison]]

h2. Install

As of 2017-01-13 unison 2.40 is in EPEL

<pre><code class="bash">

yum install unison240

</code></pre>

As of 2015-01-12 unison isn't listed in any CentOS-7 repository we build it from source

<pre><code class="bash">

yum install ocaml ocaml-camlp4-devel ctags ctags-etags

cd ~

wget http://www.seas.upenn.edu/~bcpierce/unison//download/releases/stable/unison-2.48.3.tar.gz

tar xvfz unison-2.48.3.tar.gz

cd unison-2.48.3

make

sudo cp -v unison /usr/bin

cd ~

rm -fr unison*

</code></pre>

h2. 4 Usage

Basic usage:

<pre><code class="bash">

unison /mnt/dat /media/ext_HDD

</code></pre>

if there is some Microsoft-Filesystem involved you maybe won't sync the file-permissions

<pre><code class="bash">

unison /mnt/dat /media/ext_HDD -perms 0

</code></pre>