IS better to use 7zip because is one of the best file compressors:
Is GPL'd (rar is shareware), both speeds and compression ratio performances are very similar,
7zip is more compatible with various OS.
including the oldies.
The problem comes when you try to compress *.avi files. 'avi' and 'mpeg' formats are them-selves compressed, in other words, they are compressed packages. So one file compressed 7z or rar will be almost every time the same size of the uncompressed file if not more.
For video files try Matroska (.mkv) Is wonderful, GPL'd, have better audio and video resolution, and much better compression (audio .ogg).
Try to convert your video files to matroska
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Originally Posted by SteveA The p7zip package for Linux includes the '7za' utility
You can create an archive from the current directory as:
7za a -r archivename .
and extract as:
7za x archivename.7z
These can be handled by 7zip on Windows.
There are many compression/decompression utilities under Linux. The "tar" with compression variants are very popular, but requires a corresponding WIndows utility (winzip works on some, don't know about 7zip).
tar -czvf archive.tgz .
tar -xzvf archive.tgz |
Almost forgotten: Newest p7zip versions have seemingly better performance than recent versions.
In Wind**s there are very many compressors which can handle 7z files: Powerarchiver, winzip or winrar, etc. See the 7zip home page...