Thursday, September 27, 2007

Decompressing 7-zip ( 7z ) archive files

7-zip is toted to have a higher compression ratio than the regular zip archives. The 7-zip compressed files usually have a .7z extension , but lets check with 'file' command to find what kind of file it is. $ file archive.7z archive.7z: 7-zip archive data, version 0.2 ( For this tutorial I created a 7-zip compressed archive (archive.7z) with few blank files beforehand.) Alright now lets find out what packages in GNU/Debian Sid provide tools to handle 7-zip files. $apt-cache search 7-zip advancecomp - collection of recompression utilities krusader - twin-panel (commander-style) file manager for KDE (and other desktops) lzma - Default and general compression method of 7z format in 7-Zip program p7zip - 7zr file archiver with high compression ratio p7zip-full - 7z and 7za file archivers with high compression ratio p7zip-rar - non-free rar module for p7zip Hmm, Lets go with "p7zip" package and install it. $ apt-get install p7zip The "p7zip" package provides /usr/bin/7zr program which I here use to list (l) and extract (x) our archive file. Listing with "l" parameter shows the contents of the archive. $ 7zr l archive.7z 7-Zip (A) 4.55 beta Copyright (c) 1999-2007 Igor Pavlov 2007-09-05 p7zip Version 4.55 (locale=C,Utf16=off,HugeFiles=on,1 CPU) Listing archive: archive.7z Solid = - Blocks = 0 Date Time Attr Size Compressed Name ------------------- ----- ------------ ------------ ------------------------ 2007-09-27 16:18:37 ....A 0 0 bar1 2007-09-27 16:18:58 ....A 0 0 bar2 2007-09-27 16:18:58 ....A 0 0 bar3 2007-09-27 16:18:58 ....A 0 0 bar4 ------------------- ----- ------------ ------------ ------------------------ 0 0 4 files, 0 folders Lets extract the files in the archive with "x" option. This uncompress the files to the current directory. $ 7zr x archive.7z 7-Zip (A) 4.55 beta Copyright (c) 1999-2007 Igor Pavlov 2007-09-05 p7zip Version 4.55 (locale=C,Utf16=off,HugeFiles=on,1 CPU) Processing archive: archive.7z Extracting bar1 Extracting bar2 Extracting bar3 Extracting bar4 Everything is Ok Total: Folders: 0 Files: 4 Size: 0 Compressed: 130


  1. hey pls can u tell me how to open a 72 file easy pls coz i dont understand nothing that u said upthere pls tell me

  2. sorry i mean 7z pls tell me

    1. Just download 7zip, the archive program is free, however if you have win-zip, or just about any other zip archive program it will open a 7zip file. The beauty of 7zip, not including the fact that it is free, is that, generally, it's compression ratio is greater than many and is, therefore, more efficient

  3. Thanks a lot for this article as it helped me extract file with 7z in ubuntu 9.04. Please continue this good work




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