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Yes, 7-Zip is free software. You can use it on any computer. You don't need to register or pay for 7-Zip.
-The current version of 7-Zip can't execute some operations with .7z archives that have been -created with the "solid" option switched on. You can disable solid mode with -ms=off switch -in command line
- -Support for ACE archives could be implemented in 7-Zip, if the source code -of that format was available, and the license allowed it. The Unace.dll -library from the authors of the ACE program is not -compatible with the plugin interface of 7-Zip (Unace.dll works with files, but -7-Zip only allows plugins to work with abstract streams). For this reason 7-Zip can't use -Unace.dll without a complex wrapper.
+You must run 7-Zip File Manager in administrator mode. +Right-click the icon of 7-Zip File Manager, and then click Run as administrator. +Then you can change file associations and some other options.
-You're probably using a *.* wildcard. 7-Zip doesn't use the operating system's wildcard mask parser, -and consequently treats *.* as any file that has an extension. -To process all files you must use the * wildcard instead or omit the wildcard altogether.
+Now there one main version of 7-Zip:
+Latest beta versions can fix some bugs of previous versions. +So they can be more stable in some cases. +In general it's safe to use latest beta version.
+ +These operations didn't work only in old versions of 7-Zip. +Latest 7-Zip supports any operations with "solid" archives.
In 99% of these cases it means that the archive contains incorrect headers. @@ -81,8 +94,46 @@ just ignore errors.
Instead try to find the program that was used to create the archive and inform the developers of that program that their software is not ZIP-compatible. -There are also some ZIP archives that were encoded with methods unsupported by 7-Zip. -Some of these unsupported methods: PPMd (WinZip), WAVPack (WinZip), pkAES (PkZip).
+There are also some ZIP archives that were encoded with methods unsupported by 7-Zip, +for example, WAVPack (WinZip).
+ +7-Zip doesn't know folder path of drop target. +Only Windows Explorer knows exact drop target. +And Windows Explorer needs files (drag source) as decompressed files on disk. +So 7-Zip extracts files from archive to temp folder and then +7-Zip notifies Windows Explorer about paths of these temp files. +Then Windows Explorer copies these files to drop target folder.
+ +To avoid temp file usage, you can use Extract command of 7-Zip or +drag-and-drop from 7-Zip to 7-Zip.
+ +You're probably using a *.* wildcard. 7-Zip doesn't use the operating system's wildcard mask parser, +and consequently treats *.* as any file that has an extension. +To process all files you must use the * wildcard instead or omit the wildcard altogether.
+ +In most cases you don't need -r switch. +7-Zip can compress subfolders even without -r switch.
+Example 1:
+7z.exe a c:\a.7z "C:\Program Files"+
compresses "C:\Program Files" completely, including all subfolders.
+Example 2:
+7z.exe a -r c:\a.7z "C:\Program Files"+
searches and compresses "Program Files" in all subfolders of C:\ (for example, in "C:\WINDOWS").
+If you need to compress only files with some extension, you can use -r switch: +7z a -r c:\a.zip c:\dir\*.txt+
compresses all *.txt files from folder c:\dir\ and all it's subfolders.
+ +7-Zip stores only relative paths of files (without drive letter prefix). +You can change current folder to folder that is common for +all files that you want to compress and then you can use relative paths:
++ cd /D C:\dir1\ + 7z.exe a c:\a.7z file1.txt dir2\file2.txt +
32-bit Windows allocates only 2 GB of virtual space per one application. @@ -93,10 +144,11 @@ So you can use any dictionary in Windows x64, if you have required amount of phy
Use the "/S" parameter to do a silent installation and the "/D=dir" parameter +
For exe installer: Use the "/S" parameter to do a silent installation and the "/D=dir" parameter to specify the "output directory". These options are case-sensitive. 7-Zip uses the NSIS installer by Nullsoft.
+For msi installer: Use the /q INSTALLDIR="C:\Program Files\7-Zip" parameters.
One way is to use the 7za.dll (available from sf.net for download). The 7za.dll +
One way is to use the 7z.dll or 7za.dll (available from sf.net for download). The 7za.dll works via COM interfaces. It, however, doesn't use standard COM interfaces for -creating objects. You can find a small example in the source code. A full example is +creating objects. You can find a small example in "CPP\7zip\UI\Client7z" folder +in the source code. A full example is 7-Zip itself, since 7-Zip works via this dll also. There are other applications that use 7za.dll such as WinRAR, PowerArchiver and others.
@@ -146,5 +199,9 @@ that DLL. That is the idea of free software. Read more here: You can also read about the LZMA SDK, which is available under a more liberal license. -Copyright (C) 2008 Igor Pavlov.
-