Install Unison Centos 7

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In this tutorial we will show you how to install OpenCart on CentOS 7 with LAMP stack. How To Install Unison on Ubuntu 16.04 LTS. I have recently installed CentOS 7 (Minimal Install without GUI) and now I want to install a GUI environment in it. How can I install Desktop.

File Synchronization is the process of mirroring, files and data in two or more locations in accordance with certain protocols. Files and Data are the most valuable thing in this era of Information Technology. By File Synchronization, we ensure that one or more copies of our priceless data is always available in case of disaster of any kind or when we need to work in many locations.

A good File Synchronizer is supposed to have below listed Features:

  1. Cryptographic synchronisation, as a security Implementation.
  2. A good ratio data compression.
  3. A Perfect algorithm implementation to check data duplication.
  4. Keep track of file source change.
  5. Scheduled Synchronisation.

One such tool is Unison. Here in this article we will be discussing “Unison” in details, along with its features, functionality and a lot more.

What is Unison?

Unison is a cross platform file synchronization application which is useful in synchronizing data between two or more locations be it computers or storage device.

Features of Unison

  1. Released under General Public License (GPL)
  2. Open Source and Cross Platform Available for (Linux, Unix, BSD, Windows, Mac)
  3. Make available same version of file across different machine, regardless of last modified location.
  4. Cross Platform Synchronization possible i.e., a Windows machine can be synchronized over a *nix Server.
  5. Communicate over standard Protocol TCP/IP i.e., possible between any two machines over internet regardless of Geographical Location.
  6. Smart Management – Show conflict when a file has been modified on both source and show it to the user.
  7. Secured SSH Connection – An encrypted data transfer.
  8. rsync algorithm is deployed here, only the modified part is transferred and overwritten. Hence. it’s fast in execution and Maintenance.
  9. Robust in nature
  10. Written in “Objective Caml” programming Language.
  11. Matured and Stable, no active development required.
  12. It is a user-level program ie., Application don’t need superuser privileged.
  13. It is known for its clear and precise specification.

Installation of Unison in Linux

The current stable release (Unison-2.40.102) can be downloaded from the link below:

Alternatively, we can also download and Install “Unison”, if it is available in repo using apt or yum command as shown below.

On Debian/Ubuntu/Linux Mint

Open terminal using “Ctr+Alt+T” and run the following command on the terminal.

On RHEL/CentOS/Fedora

First, enable EPEL repository and then install using the following command.

NOTE: The above command will Install Unison without GUI. If you need to Install Unison with GUI support, install ‘unison-gtk‘ package (Only available for Debian based distros) using the below command.

How to Use Unison

Unison is used to synchronize a set of files in a directory tree to another location with similar structure, which may be a local host or remote host.

Local File Synchronization

Let’s create 5 files under your Desktop and then synchronize it to a folder called ‘desk-back‘ in your home directory.

Now run the ‘unison‘ command to synchronize your Desktop files to under ‘desk-back‘ in your home directory.

Sample Output

Now check the location /home/server/desk-back, if the synchronization process was successful?

Remote File Synchronization

For remote file synchronization, you must have same version of Unison installed on both local and remote server. Run the following command to verify that the local unison can start and connect to the remote unison server.

Sample Output

The above results, indicates that the remote server is connected successfully, now sync the files using below command.

Executing GUI Unison

The first step is to set profile which requires you to set basic information as name of a profile and what you want to synchronize, source and Destination location, etc. Download running man episode 171-172 subtitle indonesia.

To start Unison GUI, run the following command on the terminal.

Enter Profile Description

Select Sync Directories

New Profile Created

Unison Sync Message

Once profile is created and source as well as destination is entered, we are welcomed with the below window.

Just select all the files and click on OK. The files will start synchronising from both the directions, based upon last update time stamp.


Unison is a wonderful tool which makes it possible to have custom synchronisation either way (Bidirectional), available in GUI as well as command Line Utility. Unison provides what it promises. This tool is very easy to use and requires no extra effort. As a tester I was very much impressed with this application. It has a whole lot of features which can be implemented as required. For more information read unison-manual.

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