Originally Posted by jishin

7-zip is a good choice.

To install on n900,

Step 1: activate Extras-testing

Application manager --> Application catalogs --> New
Catalog name: maemo.org extras-testing
Web address: http://repository.maemo.org/extras-testing
Distribution: fremantle
Components: free non-free


Step 2 : Open x terminal

Step 3 : 'sudo gainroot'

Step 4: 'apt-get update'

Step 5: 'apt-get install p7zip-full'

now 7-zip is installed into the n900


To extract files, open the terminal and type '7z e test.zip'

check following link to find complete command line options of 7z - http://dotnetperls.com/7-zip-examples