Installing zsync is quite easy. There are several ways to accomplish this.

In Kubuntu, it is as easy as opening a Konsole window and typing zsync. This is the output from that : --

paul@ubuntu:~$ zsync

The program 'zsync' is currently not installed.  You can install it by typing:

sudo apt-get install zsync

bash: zsync: command not found

paul@ubuntu:~$ sudo apt-get install zsync

[sudo] password for paul:

Reading package lists... Done

Building dependency tree

Reading state information... Done

The following NEW packages will be installed:

  zsync

0 upgraded, 1 newly installed, 0 to remove and 125 not upgraded.

Need to get 101kB of archives.

After this operation, 221kB of additional disk space will be used.

Get:1 http://nz.archive.ubuntu.com hardy/universe zsync 0.5-1ubuntu3 [101kB]

Fetched 101kB in 1s (60.0kB/s)

Selecting previously deselected package zsync.

(Reading database ... 92558 files and directories currently installed.)

Unpacking zsync (from .../zsync_0.5-1ubuntu3_i386.deb) ...

Setting up zsync (0.5-1ubuntu3) ...

paul@ubuntu:~$

It may be possible to install it using Synaptic.

Start Synaptic and put zsync in the search bar. Select it to mark it for installation, apply all changes

As a last resourt, you can download the source files from http://zsync.moria.org.uk/downloads

The current latest release is : --

Download zsync-0.5.tar.bz2

Download that and extract it to any folder.

Then locate a Konsole window in that folder and do the following commands :

./configure           [or perhaps sh  ./configure  ]

When the output ends, type

make

When the output ends, type  [optionally]

make check

Finally, when this has run, type

make install

See more about all this on my zsync-INSTALL page.