Hi.

The message colordiff: command not found means just that. It may be on your system, but you have not included its location into your PATH variable -- a set of locations in which the shell looks for commands. Another reason might be that it is not installed on your system. Try running the command:

Code:

which colordiff

which on my main system produces:

Code:

/usr/bin/colordiff

On a system to which I have access to, for example:

Code:

which colordiff

produces:
because, although it is available for that system, I have not installed it from the repository. On that system:

Code:

yum info colordiff

produces:

Code:

Loaded plugins: fastestmirror, refresh-packagekit, security
Loading mirror speeds from cached hostfile
 * base: mirrors.gigenet.com
 * centosplus: mirrors.cmich.edu
 * contrib: mirror.ubiquityservers.com
 * epel: ftp.osuosl.org
 * extras: mirror.us.leaseweb.net
 * updates: ftp.osuosl.org
Available Packages
Name        : colordiff
Arch        : noarch
Version     : 1.0.9
Release     : 3.el6
Size        : 23 k
Repo        : epel
Summary     : Color terminal highlighter for diff files
URL         : http://colordiff.sourceforge.net/
License     : GPLv2+
Description : Colordiff is a wrapper for diff and produces the same output but
            : with pretty syntax highlighting.  Color schemes can be customized.

You have not mentioned what system you are working on, so I cannot help farther for this issue. In the worst case, the command may not be available at all for your hardware/software platform, or you may need to ask the system administrator (SA) to install it. For many Linux systems, it you are the SA, then you may be able to install it. Noting that it had been available on sourceforge, it may be able to be installed in your personal files, and used from there.

As I mentioned earlier, the ansifilter is not strictly necessary unless you intend to use the colored results other than on the terminal.

If all this is too much to take in or too much work for this task, then the other previous solutions may be a better use of your time.

I have found something which does illustrate character-level differences (insertions, deletions, replacements), but not in color. An advantage is that it is a shell script, so you would probably be able to use it easily, but no color is involved (although an enterprising person might be able to add color).

Best wishes ... cheers, drl

( Edit 1: correct minor typos )