Please explain "untar" to a complete idiot

[EllaGuru1966]

I am running CMS Made Simple 1.2.4 , mySQL version 5.0.91-community (formerly 4.1.22) and php . 5.2.14 (formerly 4.4.5). I know you do not support that version which is why I am attempting to upgrade
to CMSMS 1.9.2.

I have spent an hour goggling the phrase "untar" and while there are instructions, no one explains where you are meant to type the "command". Also I would like to do this on a mac and most insctructions mention windows and "right clicking" which Macs do not have. And finally, my CMSMS site is in a subdomain of another site. I presume this means then that my "ROOT" folder is not public)_html, but the subdomain folder?

PLease explain to a complete idiot what this means (from the upgrade.txt file):

2. Untar the source package to document root dir or your webserver
- cd DOCUMENT_ROOT
- tar xvfz cmsmadesimple-VERSION.tar.gz
OR
- cd DOCUMENT_ROOT
- tar xvfz cmsmadesimple-diff-<prev_version>-<version>.tar.gz
** Validate that the prev_version number matches your current version **

Thanks

[RonnyK]

untar is the unix command for unpacking. Tools like 7zip can do both unzip/untar, so you can use that for 'untarring' as well

Mac I dont know, so I cant tell what is to be done there, on windows I always use 7zip for unpacking of zips/tar.gz etc...

Ronny

[EllaGuru1966]

It just means unpack? Is that different than what it does automatically?

I downloaded cmsmadesimple-1.9.2-full.tar.gz. I clicked on it and a big folder called cmsmadesimple-1.9.2-full appeared, with all the folders inside etc.

I have backed up all my files, so now I just continue with UPDGRADE.txt instructions. Is that correct?

Thanks