7-Zip

Pros:
* GNU license so freeware. Winzip is not that free anymore.

* Can do password protection which Windows Vista and 7 can’t.

* Supports formats other than zip such as TAR and GZIP.

Download and Install

* Download 7-Zip from its download page. Install.

* Add install directory to the PATH environment variable for convenience.

Use

Help

* Open ‘7-Zip Help’ from the Start menu to see help file.

* Or on a dos command window, type ‘7z -h’ to view the command line help.

Examples

* Zip up all files in the current directory (*),
including all subdirectories (-r),
into a zip file type (-tzip).
Name the zip file as my.zip (a my.zip)
and use ‘secret’ as the password (-psecret).

7z a my.zip -tzip -r -psecret *
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